Klassen D J, Monardes H G, Jairath L, Cue R I, Hayes J F
Department of Animal Science Macdonald College, McGill University, Ste. Anne de Bellevue, PQ, Canada.
J Dairy Sci. 1992 Aug;75(8):2272-82. doi: 10.3168/jds.S0022-0302(92)77988-0.
Genetic and phenotypic correlations were estimated between 6 lifetime production and 28 linearized type traits using REML. The data set contained 34,322 cows, each with a record for all 34 traits. The analyses accounted for the fixed effects of herd, year-month, classifier, age at first calving, and stage of lactation. Heritabilities were low for lifetime traits and moderate for most type traits except stature, size, capacity, thurl width, and pin setting, which had high heritabilities. Most phenotypic correlations between lifetime production and type were in the range of .15 to .20 except for capacity, rump, and feet and legs, which were around .07. Genetic correlations were strong between lifetime production and angularity (.44 to .55) and dairy character (.53 to .56). Genetic correlations were low to moderate between life-time production and stature (.14 to .25), size (.07 to .18), texture (.19 to .26), style (.11 to .27), head (.15 to .23), pin setting (.10 to .16), rear udder (.19 to .25), and rear attachment (.10 to .22). The only notable negative genetic correlations were lifetime production with rear heel (-.16 to -.27), thurl width (-.18 to -.24), and fore udder (-.05 to -.11).
使用限制最大似然法（REML）估计了6个终生生产性状与28个线性化体型性状之间的遗传和表型相关性。数据集包含34322头奶牛，每头奶牛都有这34个性状的记录。分析考虑了牛群、年月、分级员、初产年龄和泌乳阶段的固定效应。终生性状的遗传力较低，除了体高、体尺、容量、髋宽和臀角定位等具有高遗传力的性状外，大多数体型性状的遗传力适中。终生生产性状与体型之间的大多数表型相关性在0.15至0.20之间，容量、尻部以及蹄腿的相关性约为0.07。终生生产与棱角性（0.44至0.55）和乳用特征（0.53至0.56）之间的遗传相关性很强。终生生产与体高（0.14至0.25）、体尺（0.07至0.18）、质地（0.19至0.26）、风格（0.11至0.27）、头部（0.15至0.23）、臀角定位（0.10至0.16）、乳房后部（0.19至0.25）和附着部后部（0.10至0.22）之间的遗传相关性为低到中等。唯一显著的负遗传相关性是终生生产与后蹄跟（-0.16至-0.27）、髋宽（-0.18至-0.24）和乳房前部（-0.05至-0.11）之间的相关性。
