荷斯坦牛线性性状与产奶量的表型相关分析  

A Phenotype Correlation Type between Individual Linear Type Traits Functional Score and 305 d Corrected Milk Yield of a Holstein Herd

作　　者：夏婷[1] 苏鹏程[1] 王云[1] 王中华[1] 

机构地区：[1]山东农业大学动物科技学院,山东泰安271018

出　　处：《中国牛业科学》2010年第1期5-8,共4页China Cattle Science

基　　金：山东省奶牛良种工程项目资助

摘　　要：[目的]为了研究荷斯坦牛体型线性性状之间及线性性状与305 d产奶量之间的表型相关。[方法]选择40头第三胎健康荷斯坦泌乳牛,按9分制评分方法对15个体型性状进行评分,对功能分之间、功能分与305 d校正产奶量之间进行相关性回归分析。[结果]表明:305 d校正产奶量与臀宽、胸宽、体深、前房附着、整体评分、乳头长度之间成极显著正相关(P<0.01);经自变量的筛选,建立了305 d校正产奶量(Y)与胸宽(X2)、体深(X3)、臀宽(X6)、前房附着(X9)、后房高度(X10)、乳头位置(X14)之间的回归方程Y=-5529.945+59.456X2+3.024X3-3.069X6+70.173X9+19.834X10-8.892X14,R2=0.9231。[结论]依据上述六个性状可以预测荷斯坦奶牛的产奶量。[Objective]Data of linear type trait scores and 305 d milk yield records of 40 healthy Holstein cows was analyzed in the study. [Method]Functional type traits were scored according to system recommended by the Canadian Holstein association, and SAS software was used to establish the regression equation between 305d milk yield and the measured linear functional type traits. [Result]Results of correlation analysis indicated that there was significant difference between 305 d milk yield and rump width, chest width, body depth, udder attachment and teat length （ P 〈0.01）. A regression equation was established between 305d milk yield （Y） and chest width（X2）, body depth（X2）, rump width（X6）, fore udder attachment（X9）, rear udder height（X10）,teat placement （X14）, which was as follows. Y=-5529. 945＋59. 456 X2＋3. 024Xa-3. 069X6 ＋70. 173X9 ＋19. 834X10-8. 892X14 ,R2 =0. 9231. [Conclusion]The milk yield of Holstein cattle could be predicted by the above six traits.

关 键 词：奶牛 线性性状 305 d产奶量 相关分析 

分 类 号：S823.2[农业科学—畜牧学]