%0 Journal Article
%T PurelineselectionofJinyangⅢstraininlate-featheringLeghorn
%A 赵德燕
%A 李温
%A 田水仙
%A 段栋梁
%A 吴忻
%J 华北农学报
%P 130-134
%D 1993
%R 10.7668/hbnxb.1993.S2.023
%X JinyangⅢstrainoflate-featheringLeghornchickenhasbeensuccessivelyselectedwithcomprehensiveindexfor7generationsbyfamilybreedingmethodofmass-firstandclosing-late.Ascomparedwiththecontrol,theselectionresultisaverage7daysearlieratfirstlayingforeverygeneration,morethan13ofeggnumberatageof300daysandhigherthan0.63%forsur-vivalrateinlayingperiod.Mainlayingperformancesareasfollows:ageatfirstlaying156±10.4days;eggnumberatageof300days99±26.O;eggnumberandeggweightat72weeksofage226±38.8and58.2±4.6grespectively.Throughcrossbreedingselection,aseriesofwhite-shellau-tosexingchickenhasbeendeveloped.Morethan5.1millioncommercialsex-identifiedchickenhavebeenreleasedaswell.
%K chicken
%K JinyangwhiteLeghorn
%K latefeathering
%K selection
%U http://www.hbnxb.net/CN/abstract/abstract6475.shtml