肉牛雜交組合篩選及牦牛瘦素受體基因多態(tài)性分析.pdf

1、甘肅農(nóng)業(yè)大學碩士學位論文肉牛雜交組合篩選及牦牛瘦素受體基因多態(tài)性分析姓名：閆偉申請學位級別：碩士專業(yè)：動物遺傳育種與繁殖指導教師：羅玉柱胡江20100601甘肅農(nóng)業(yè)大學2010屆碩一l：學位論文SummaryScreeningofcrOSScombinationistheimportantlinkforutilizationofheterosisThispaperdepandsonQinchuanandearlywinsgoodbeef

2、cattle’recourseintheareaofeastinordertoscreenbeefcrossesforproductionconditioninlocalareasandprovidetechnicalsupportfortheproductiveapplicationFeedingexperimentswerecarriedoutin26beefcattles(8)at10monthdividedinto5groups

3、includinglizagroup(LimousindQinchuan早F1)，Xizagroup(Simmentaic；IxQinchuan早F1)，Nanzagroup(NandewendxQinchuan早F1)，Qinehuan毋F1andQinza(Qinchuan艿xLoculcattle早F1)，and26beefcattleat24monthwereslaughted，thengrowthandslaughterper

4、formancewereanalysisandcomparisonTheresultsindicatedthatdailybodyweightgainofLizaXizaNanzaQinchuanandQinzaWasO88、091、077、073andO87kgrespectivelywhichofXizaWasthehightestandQinchuanwasthelowest，butnodifferencein5groups(P0

5、05)BodyheightandlengthandleghipofLizacattleat24monthweresignificanthigherthanXizaandQinchuanrespectivelyandheartgirthofNanzacattleWaSlowerthanQinzasignificantly(P005)DressingpercentageandneatpercentageofLizawerethehighes

6、t，buthotCarCasSweight，Eyemuscleareadressingpercentageandneatpercentagehadnodifferenceindifferentgroups(P005)RatioofbonetomeatofQinzagroupWassignificantlowerthanbothofLizaandNanzagroup，orcarcassmeatyieldrateofQinchuanWass