江苏省黑白花奶牛遗传参数分析

An Analysis of Genetic Parameters for Chinese Black and White Dairy Cattle in Jiangsu

对江苏省14个人中型牧场1978—1987年间备有54头公牛的2637头黑白花奶牛生产记录,按Harvey的LSMLMW程序进行分析,结果表明,该牛群体型虽较小,但具有较高泌乳性能。在研究各性状的遗传力中,除初生重、18月龄体高外,其它各性状的遗传力均较低。

In order to provide theory basis for cattle breeding in Jiangsu, data of 1978-1987 on 2637 Chinese black and white dairy cows sired by 54 bulls on 14 state farms were analyzed using Harvey's Model 2. It showed that the cows had smaller body measurements, but higher milk yields. Except for the birth weight and height at 18 months, the here-tabilities were low. The correlations among the main traits were also studied. Genetic correlations between body measurements and productive traits were almost negative(-0.13--0.8),but those between productive traits were almost, positive.