【摘要】 本文以南京市12头乳用种公牛（其中引进上海市6头、合肥市1头的冻精）为实例,应用公牛间有亲缘关系的BLUP法估计其育种值,电算求得参数(μ、h_i、g_i、S_jk),按育种值排列优劣名次,并与不加入公牛间亲缘关系的结果进行比较,发现两法间略有差异,其计算方法在矩阵对角线的公牛效应元素上加A^1-（即公牛间亲缘关系的逆阵）即可。研究结果认为在公牛间有亲缘关系时,以加入计算更为符合客观实际,可提高估计精确度。更多还原

【Abstract】 The breeding values of 12 dairy bull, were evaluated by BLUP method, and the parameters (μ, h_i, g_i, S_jk) were obtained by using computer. Comparing this evaluation with thnt of not using relationship matrix, there are some difference between them. In the calculation, A^1-should be added to the elements of bull, effect on the diagonal of matrix. The results show that bull evalution considering relationship between them conforms to reality, and is more accurate.更多还原