Van Vleck L D, Murphy P A
J Dairy Sci. 1983 Mar;66(3):634-7. doi: 10.3168/jds.S0022-0302(83)81836-0.
Multiple regression of genetic evaluations for milk yields of first lactations of 159 Holstein bulls on sire, dam, and maternal grandsire evaluations indicates that the weight for estimated transmitting ability of the dam calculated from the first record of the dam and first records of her herdmates is about as theoretically expected and is markedly superior both to estimated transmitting ability computed from the first record of the dam and all records of her herdmates and to estimated transmitting ability computed from all records of the dam and her herdmates. The latter two procedures gave similar results.
对159头荷斯坦公牛头胎产奶量的遗传评估进行多元回归分析，结果表明，根据母牛的首次记录及其同群母牛的首次记录计算出的母牛估计传递能力的权重，与理论预期大致相符，且明显优于根据母牛的首次记录及其同群母牛的所有记录计算出的估计传递能力，也优于根据母牛及其同群母牛的所有记录计算出的估计传递能力。后两种方法得出的结果相似。
