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<title><![CDATA[sdxtmy999'职业博客]]></title>
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<modified>2009-10-01T03-23-10 CST</modified>
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<copyright>Copyright (c) 2005,  sdxtmy999</copyright>


<entry>
<title>杂交羊的改良技术>>山东畜牧合作社 </title>
<link rel="alternate" type="text/html" href="http://www.bokee.net/blogmodule/weblogcomment_viewEntry/3612881.html"/>
<issued>2009-08-14T12-23-48 CST</issued> 
<created>2009-08-14T12-23-48 CST</created>
<modified>2009-08-14T12-23-48Z</modified>
<id>tag:sdxtmy999.blogchina.com,2005://3612881</id>
<author>
<name>sdxtmy999</name>
<url>http://www.bokee.net/blogmodule/weblogcomment_index/sdxtmy999.html</url>
</author>
<dc:subject>牛羊饲养管理</dc:subject>
<content type="text/html" mode="escaped" xml:lang="zh_CN" xml:base="http://www.bokee.net"> 
<![CDATA[<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">杂交方法主要有导入杂交和级进杂交、经济杂交</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><strong style="mso-bidi-font-weight: normal"><font size="3"><span style="COLOR: blue; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">导入杂交</span><span style="COLOR: blue"><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></span></font></strong></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">当某些缺点在本品种内的选育无法提高时可采用导入杂交的方法</span><font face="Times New Roman"> </font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">。导入杂交应在生产方向一致的情况下进行。改良用的种与原品种母羊杂交一次后再进行</span><span lang="EN-US"><font face="Times New Roman">1-2</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">次回交，以获得含外血</span><span lang="EN-US"><font face="Times New Roman">1/4-1/8 </font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的后代，用以进行自群繁育。导入杂交在养羊业中广泛应用，其成败在很大程度上取决于改良用品</span><strong style="mso-bidi-font-weight: normal"><span lang="EN-US" style="COLOR: red"><a href="http://www.ny789.com/"><span lang="EN-US" style="COLOR: red; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">种公羊</span></span></a></span></strong><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">的选择和杂交中的选取配及羔羊的培育条件方面。在导入杂交时，选择品种的个体很重要。因此要选择经过后裔测验和体型外貌特征良好，配种能力强的公羊，还要为杂种羊创造一定的饲养管理条件，并进行细致的选配。此外，还要加强原品种的选育工作，以保证供应好的回交种羊。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><strong style="mso-bidi-font-weight: normal"><font size="3"><span style="COLOR: blue; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">级进杂交</span><span style="COLOR: blue"><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></span></font></strong></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">级进杂交也称吸收杂交，改进杂交。改良用的</span><strong style="mso-bidi-font-weight: normal"><span lang="EN-US" style="COLOR: red"><a href="http://www.ny789.com/"><span lang="EN-US" style="COLOR: red; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">种公羊</span></span></a></span></strong><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">与当地母羊杂交后，从第一代杂种开始，以后各代所产母羊，每代继续用原改良品种公羊选配，到</span><span lang="EN-US"><font face="Times New Roman">3-5</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">代杂种后代生产性能基本与改良品种相似。杂交后代基本上达到目标时，杂交应停止。符合要求的杂种公母羊可以横交。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><strong style="mso-bidi-font-weight: normal"><font size="3"><span style="COLOR: blue; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">经济杂交</span><span style="COLOR: blue"><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></span></font></strong></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">经济杂交是利用两个品种的一代杂种提供产品而不做种用。一代杂种具有杂种优势，所以生活力强，生长发育快，在肥羔肉生产中经济应用。经济杂交的优点在于，第一代的杂种公羔生长快，生产商品肉有重要意义，它的第一代杂种母羊不仅可以做为肉羊，也可以做为种用提高生产性能。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><strong style="mso-bidi-font-weight: normal"><font size="3"><span style="COLOR: blue; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">育种计划和记载</span><span style="COLOR: blue"><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></span></font></strong></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">育种工作必须有计划的进行。育种计划要结合环境和饲养管理条件和市场需要而制定。要制定育种目标、引种、繁育、生产性能的测定等方面。同时，在育种过程中有做好记载，它为育种提供可靠的依据。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp;&nbsp; </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">鑫泰畜牧专家教您怎样挑选优质牛羊，怎样饲养管理牛羊，凡在我场引种者免费传授公畜去势，人工授精，刨腹产手术，胚胎移植等技术</span><span lang="EN-US"><font face="Times New Roman">.......<o:p></o:p></font></span></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><strong style="mso-bidi-font-weight: normal"><span lang="EN-US" style="COLOR: fuchsia"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp;</font></span></span></strong><strong style="mso-bidi-font-weight: normal"><span style="COLOR: fuchsia; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">鑫泰牧业场长：牟志松</span><span lang="EN-US" style="COLOR: fuchsia"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp; </font></span></span></strong><strong style="mso-bidi-font-weight: normal"><span style="COLOR: fuchsia; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">欢迎新老客户前来参观、考察、引种！！</span><span lang="EN-US" style="COLOR: fuchsia"><o:p></o:p></span></strong></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><strong style="mso-bidi-font-weight: normal"><span style="COLOR: fuchsia; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">牛羊调拨热线：</span><span lang="EN-US" style="COLOR: fuchsia"><font face="Times New Roman">13228172353<span style="mso-spacerun: yes">&nbsp; </span></font></span></strong><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;</span>0537-2158089 <o:p></o:p></font></span></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp;</font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">专家在线：</span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>QQ</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</span><span lang="EN-US"><font face="Times New Roman">839593699 <o:p></o:p></font></span></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><a href="http://www.bokee.net/common/js/fckeditor/editor/E-mail：sdxtmy996@126.com%20"><font size="3"><font face="Times New Roman">E-mail</font><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">：</span></span><font face="Times New Roman">sdxtmy996@126.com </font></font></a><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp;</font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">鑫泰牧业网址</span><span lang="EN-US"><font face="Times New Roman">: </font><a href="http://www.ny789.com/"><font face="Times New Roman">Http://www.ny789.com</font></a><font face="Times New Roman"> <o:p></o:p></font></span></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">营业执照注册号：</span><span lang="EN-US"><font face="Times New Roman">370686na000153x<o:p></o:p></font></span></font></p>]]>
</content>
</entry>

<entry>
<title>纯种羊的繁育>>山东畜牧合作社</title>
<link rel="alternate" type="text/html" href="http://www.bokee.net/blogmodule/weblogcomment_viewEntry/3612878.html"/>
<issued>2009-08-14T12-22-50 CST</issued> 
<created>2009-08-14T12-22-50 CST</created>
<modified>2009-08-14T12-22-49Z</modified>
<id>tag:sdxtmy999.blogchina.com,2005://3612878</id>
<author>
<name>sdxtmy999</name>
<url>http://www.bokee.net/blogmodule/weblogcomment_index/sdxtmy999.html</url>
</author>
<dc:subject>Default Cloumn</dc:subject>
<content type="text/html" mode="escaped" xml:lang="zh_CN" xml:base="http://www.bokee.net"> 
<![CDATA[<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp;</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">羊的育种包括纯种繁育。纯种繁育和杂交都需要纯的</span><strong style="mso-bidi-font-weight: normal"><span lang="EN-US" style="COLOR: fuchsia"><a href="http://www.ny789.com/"><span lang="EN-US" style="COLOR: fuchsia; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">种羊</span></span></a></span></strong><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，有了好的种羊，才能繁育出品质优良的后代。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">应该加强培育，创造合理的饲养条件，保证正常发育，使遗传性得到发挥，才能选育出真正优秀的种羊。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一、<strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue">选种</span></strong></span><font face="Times New Roman"><strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue"> </span></strong><span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">在育种过程中，不断地培育出生产性能好的</span><strong style="mso-bidi-font-weight: normal"><span lang="EN-US" style="COLOR: fuchsia"><a href="http://www.ny789.com/"><span lang="EN-US" style="COLOR: fuchsia; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">种羊</span></span></a></span></strong><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">来扩大繁殖，才能达到提高经济效益的目的，因此选种是选育的前提和基础。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（一）<strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue">选种的根据</span></strong></span><strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue"><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></span></strong></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><strong style="mso-bidi-font-weight: normal"><span lang="EN-US" style="COLOR: blue"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></strong></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选种主要根据体型外貌、生产性能、后代品质、血统四个方面，对羊只进行个体鉴定的基础上进行。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、<strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue">体型外貌</span></strong></span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">体型外貌在纯种繁育中非常重要，凡是不符合本品种特征的羊不能做为选种的对象。另外体型对生产性能方面有直接的关系，也不能忽视。如果忽视体型，生产性能全靠实际的生产性能测定来完成，就需要时间，造成浪费。比如产肉性能、繁殖性能的某些方面，可以通过体型选择来解决。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">2</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、<strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue">生产性能</span></strong></span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">生产性能指体重、屠宰率、繁殖力、泌乳力，早熟性、产毛量、羔裘皮的品质等方面。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">羊的生产性能，可以通过遗传传给后代，因此选择生产性能好的种羊是选育的关键环节。但要在各个方面都优于其他品种是不可能的，应突出主要优点。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">3</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、<strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue">后裔</span></strong></span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><strong style="mso-bidi-font-weight: normal"><span lang="EN-US" style="COLOR: fuchsia"><a href="http://www.ny789.com/"><span lang="EN-US" style="COLOR: fuchsia; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US"><font size="3">种羊</font></span></span></a></span></strong><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">本身是不是具备了优良性能这是选种的前提条件，但这仅仅是一个方面，更重要的是它的优良性能是不是传给了后代。如果优良性能不能传给后代的种羊，不能继续做为种用。同时在选种过程中，要不断地选留那些性能好的后代做为后备种羊。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">4</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、<strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue">血统</span></strong></span><strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue"><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></span></strong></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">血统即系谱，是选择种羊的重要依据，它不仅提供了种羊亲代的有关生产性能的资料，而且记载着羊只的血统来源，对正确地选择种羊很有帮助。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（二）<strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue">选种的方法</span></strong></span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、<strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue">鉴定</span></strong></span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选种要在对羊只进行鉴定的基础上进行。羊的鉴定有个体鉴定和等级鉴定两种，都按鉴定的项目和等级标准准确地进行译定等级。个体鉴定要有按项目进行的逐项记载，等级鉴定则不做具体的个体记录，只写等级编号。进行个体鉴定的羊包括特级、一级公羊和其他各级种用公羊，准备出售的成年公羊和公羔，特级母羊和指定作后裔测验的母羊及其羔羊。除进行个体鉴定的以外都作等级鉴定。等级标准可根据育种目标的要求制定。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">羊的鉴定一般在体型外貌、生产性能达到充分表现，且有可能作出正确判断的时候进行。公羊一般在到了成年，母羊第一次产羔后对生产性能予以测定。为了培育优良羔羊，对初生、断奶，</span><span lang="EN-US"><font face="Times New Roman">6</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">月龄、周岁的时候都要进行鉴定，裘皮型的羔羊，在羔皮和裘皮品质最好时进行鉴定。后代的品质也要进行鉴定，主要通过各项生产性能测定来进行。对后代品质的鉴定，是选种的重要依据。凡是不符合要求的及时淘汰，合于标准的做为种用。除了对个对鉴定和后裔的测验之外，对种羊和后裔的适应性、抗病力等方面也要进行考察。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">2</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、<strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue">审查血统</span></strong></span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">通过审查血统，可以得出选择的种羊与祖先的血缘关系方面的结论。血统审查要求有详细记载，凡是自繁的种羊应做详细的记载。购买种羊时要向出售单位和个人，索取卡片资料，在缺少记载的情况下，只能根据羊的个体鉴定做为选种的依据，无法进行血统的审查。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">3</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、<strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue">选留后备种羊</span></strong></span><font face="Times New Roman"><strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue"> </span></strong><span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">为了选种工作顺利进行，选留好后备种羊是非常必要的。后备种羊的选留要从以下几个方面进行。一是要选窝（看祖先），从优良的公母羊交配后代中，全窝都发育良好的羔羊中选择。母羊需要第二胎以上的经产多羔羊。二是选个体，要选留初生重和生长各阶段增重快、体尺好、发情早的羔羊中选择。三是选后代，要看种羊所产后代的生产性能，是不是将交母代的优良性能传给了后代，凡是没有这方面的遗传，不能选留。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">后备母羊的数量，一般要达到需要数的</span><span lang="EN-US"><font face="Times New Roman">3-5</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">倍，后备公羊的数也要多于需要数，以防在育种过程中有不合格的羊不能种用而数量不足。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（三）<strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue">选种标准</span></strong></span><font face="Times New Roman"><strong style="mso-bidi-font-weight: normal"><span style="COLOR: blue"> </span></strong><span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">要根据育种目标，在体型外貌、生产性能、体尺体重、产肉、产羔率，泌乳量、早熟性、产毛性能、裘用性能上按标准选种。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp; </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选配</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选种是羊只品质的选择，选择的种羊又通过选配来巩固选种的效果，因此，选配是选种的继续，是育种工作中有机联系的重要方面。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（一）选配的原则</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、选配要与选种紧密的结合起来，选种要考虑选配的需要，为其提供必要的资料；选配要和选种配合，好使双亲有益性状固定下来，并传给后代。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">2</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、要用最好的公羊选配最好的母羊，但要求公羊的品质和生产性能，必须高于母羊，较差的母羊，也要尽可能与较好的公羊交配，使后代得到一定程度的改善，一般二、三级公羊不能作种用，不允许有相同缺点的公母羊进行选配。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">3</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、要扩大利用好的种公羊，最好经过后裔测验，在遗传性未经证实之前，选配可按羊体型外貌和生产性能进行。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">4</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、种羊的优劣要根据后代品质做出判断，因此要有详细和系统的记载。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（二）选配的方法</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、品质选配</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">同质选配，具有相同生产特性或优点的公母羊进行交配，目的在于巩固和提高共同的优点。同质选配能使后代保持和发展原有的特点，使用遗传性趋于稳定。但过分强调同质选配的优点，容易造成单方面的过度发育，使体质变弱，生活力降低。因此在繁育过程中的同质选配，可根据育种工作的实际需要而定。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">异质选配，选择具有不同优点的公母羊进行配种，或好的种公羊与具有某些缺点的母羊相配种，其目的在于使用权后代能结合双亲的优点，或克服母羊的某些缺点。这种选配方式的优缺点，在某种程度上与同质选配相反。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">2</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、品质选配的具体应用</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">个体选配，是在羊的个体鉴定的基础上进行的选配。它主要是根据个体鉴定，生产性能，血能和后代品质等情况决定交配双方。对那些完全符合育种方向，生产性能达到理想要求的优秀母羊。可以选择两个类型的公羊。一是同质选配，使其后代具有更理想和更稳定的优良品质；二是进行异质选配，以获得结合双亲不同优良品质的后代。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">等级选配，是根据每一个等级母羊的综合特征选择公羊，以求获得共同优点和共同缺点的改进。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">亲缘选配，是具有一定血缘关系的羊之间的选配。亲缘远配的作用在于遗传性稳定，这是优点，但亲缘选配容易引起后代的生活力降低，羔羊体质弱，体格变小，生产性能降低。亲缘交配，应采取下列措施，预防不良后果的产生，一是严格选择和淘汰。必须根据体质和外貌来选配，使壮而强壮的公母羊配种可以减轻不良后果。亲缘选配所产生的后代，要仔细鉴别，选留那些体质坚实和健壮的个体继续做种羊。凡体质弱，生活力低的个体应予以淘汰。二是血缘更新，是把亲缘选配的后代和没有血缘关系，并培育在不同条件下的同品种选配，可以获得生活力强和生产性能好的后代。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">三、纯种繁育</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（一）品系繁育</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">品系是品种内具有共同特点，彼此有亲缘关系的个体所组成的遗传性稳定的群体。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">1</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、建立基础群</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">建立基础群，一是按血缘关系组群，二是按性状组群。按血缘组群，先将羊群进行系谱分析，查清公羊后裔特点，选留优秀公羊后裔建立基础群，但其后裔中不具备该品系特点的不应留在基础群。这种组群方法在遗传力低的采用。按性状分群，是根据性状表现来建立基础群。这种方法不管血缘而按个体表现组群。按性状组群在羊群的遗传力高时采用。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><font face="Times New Roman">2</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">、建立品系</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">基础群建立之后，一般把基础群封闭起来，只在基础群内选择公母羊进行繁殖，逐代把不合格的个体淘汰，每代都按品系特点进行选择。最优秀的公羊尽量扩大利用率，质量较差的不配或少配。亲缘交配在品系形成中是不可缺少的，一般只作几代近交，以后转而采用远交，直到特点突出和遗传性稳定后纯种品系已经育成。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">（二）血液更新</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">血液更新是指导把具有一致遗传性和生产性能，但来源不相接近的同品系的种羊，引入另外一个羊群。由于酱的公母羊属于同一品系，仍是纯正种繁育。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">血液更新在下列情况下进行。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">一是在一个羊群中或羊场中，由于羊的数量较少而存在近交产生不良后果时。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">二是新引进的品种改变环境后，生产性能降低时。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><o:p><font face="Times New Roman" size="3">&nbsp;</font></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">三是羊群质量达到一定水平，生产性能及适应性等方面呈现停滞状态时。血液更新中，被引入的种羊在体质、生产性能、适应性等方面没有缺点。</span><font face="Times New Roman"> <span lang="EN-US"><o:p></o:p></span></font></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp; </font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">鑫泰畜牧专家教您</span><strong style="mso-bidi-font-weight: normal"><span lang="EN-US"><a href="http://www.ny789.com/"><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">怎样挑选优质牛羊</span></span></a></span></strong><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">，怎样饲养管理牛羊，凡在我场引种者免费传授公畜去势，人工授精，刨腹产手术，胚胎移植等技术</span><span lang="EN-US"><font face="Times New Roman">.......<o:p></o:p></font></span></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><font face="Times New Roman"><font size="3"><span style="mso-spacerun: yes">&nbsp;</span><strong style="mso-bidi-font-weight: normal"><span style="COLOR: fuchsia"><span style="mso-spacerun: yes">&nbsp;</span></span></strong></font></font></span><font size="3"><strong style="mso-bidi-font-weight: normal"><span style="COLOR: fuchsia; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">鑫泰牧业场长：牟志松</span><span lang="EN-US" style="COLOR: fuchsia"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp; </font></span></span></strong><strong style="mso-bidi-font-weight: normal"><span style="COLOR: fuchsia; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">欢迎新老客户前来参观、考察、引种！！</span><span lang="EN-US" style="COLOR: fuchsia"><o:p></o:p></span></strong></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><strong style="mso-bidi-font-weight: normal"><span style="COLOR: fuchsia; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">牛羊调拨热线：</span><span lang="EN-US" style="COLOR: fuchsia"><font face="Times New Roman">13228172353<span style="mso-spacerun: yes">&nbsp; </span></font></span></strong><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span>0537-2158089 <o:p></o:p></font></span></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp;</font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">专家在线：</span><span lang="EN-US"><font face="Times New Roman"><span style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </span>QQ</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">：</span><span lang="EN-US"><font face="Times New Roman">839593699 <o:p></o:p></font></span></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><span lang="EN-US"><a href="http://www.bokee.net/common/js/fckeditor/editor/E-mail：sdxtmy996@126.com%20"><font size="3"><font face="Times New Roman">E-mail</font><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'"><span lang="EN-US">：</span></span><font face="Times New Roman">sdxtmy996@126.com </font></font></a><o:p></o:p></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span lang="EN-US"><span style="mso-spacerun: yes"><font face="Times New Roman">&nbsp;</font></span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">鑫泰牧业网址</span><span lang="EN-US"><font face="Times New Roman">:</font><a href="http://www.ny789.com/"><font face="Times New Roman"> Http://www.ny789.com</font></a><font face="Times New Roman"> <o:p></o:p></font></span></font></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">营业执照注册号：</span><span lang="EN-US"><font face="Times New Roman">370686na000153x<o:p></o:p></font></span></font></p>]]>
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