CAJ | 학술논문

为研究40周龄母鸡体尺性状的内在遗传机理,以绿壳蛋鸡黑羽纯系和白来航鸡为对象构建分离群体,测定亲本(P1、P2)、F1代和F2代母鸡40周龄的体尺,运用主基因+多基因混合遗传分析软件SEA-G4F2对分离群体40周龄体尺性状进行遗传分析。结果表明：母鸡40周龄的胫围、胫长、胸角和胸宽的最适模型均为E-1,即2对加性-显性-上位性主基因+加性-显性多基因混合遗传模型,其对应的主基因的遗传率分别为60.89%、61.24%、55.62%和59.43%；龙骨长和体斜长的最适模型均为E模型,即2对加性-显性-上位性主基因+加性-显性-上位性多基因混合遗传模型,主基因遗传率为16.52%和30.76%,龙骨长对应的多基因的遗传率为7.2%。6个体尺性状中除了龙骨长检测出多基因外,其他性状均未检测到多基因,各个性状的主基因的遗传效应均大于多基因的遗传效应。
위연구40주령모계체척성상적내재유전궤리,이록각단계흑우순계화백래항계위대상구건분리군체,측정친본(P1、P2)、F1대화F2대모계40주령적체척,운용주기인+다기인혼합유전분석연건SEA-G4F2대분리군체40주령체척성상진행유전분석。결과표명：모계40주령적경위、경장、흉각화흉관적최괄모형균위E-1,즉2대가성-현성-상위성주기인+가성-현성다기인혼합유전모형,기대응적주기인적유전솔분별위60.89%、61.24%、55.62%화59.43%；용골장화체사장적최괄모형균위E모형,즉2대가성-현성-상위성주기인+가성-현성-상위성다기인혼합유전모형,주기인유전솔위16.52%화30.76%,용골장대응적다기인적유전솔위7.2%。6개체척성상중제료용골장검측출다기인외,기타성상균미검측도다기인,각개성상적주기인적유전효응균대우다기인적유전효응。
Black-feathered line of green-shelled laying hens( P1 ) , while leghorn chickens( P2 ) , and the 40-week-old hens of the segregating populations( F1 , F2 ) were measured for the body sizes traits to study the inheritance of body size using major gene plus polygene mixed model. Model E-1 , a two-pair additive-dominance-epistatic major gene plus additive-dominance polygene mixed genetic model fitted the best for shank girth, shank length, chest angle and chest width of hens at 40-week-old, with the heritabilities of major gene being 60. 89%, 61. 24%, 55. 62% and 59. 43%, respectively. The best model for keel length and body slanting length was model E, a two-pair additive-dominance-epistatic majorgene plus additive-dominance-epistatic polygene mixed genetic model, with the heritabilities of major gene being 16. 52% and 30. 76%, and the heritability of polygene for keel length being 7. 2%. The poly-gene heritablity in six body size traits was not detected except for keel length, and the genetic efficiency of major genes is greater than polygenes.