利用R语言程序计算德国弗莱维赫改良牛群的近交和亲缘系数

Calculation of coefficients of relatedness and inbreeding for Germany-Fleckvie using R program

中文关键词: 德国弗莱维赫牛  亲缘系数  近交系数  R语言  系谱

英文关键词: Germany-Simmental（Fleckvieh cattle）,coefficient of relationship, coefficient of inbreeding, R program, genealogy

中文摘要:

      本试验目的是利用德国西门塔尔牛（弗莱维赫牛）与澳大利亚西门塔尔母牛品系间、及德国西门塔尔牛（弗莱维赫牛）与本地肉用母牛选种选配后，培育优秀种群；方法是通过个体牛只信息和编号、父母代和祖父母代信息和编号，采用近交系数和亲缘系数的计算公式，利用R语言编制程序计算47头德国西门塔尔牛牛（弗莱维赫牛）的后代母牛个体间亲缘系数和近交系数。结果是所有个体间均无近交，近交系数为0，群体亲缘系数值在0~0.5之间。本试验的牛群主要来自于自繁自育母牛场，做选配时，较好地控制了近交系数，但是，从亲缘系数来看，在群使用的种公牛较少，为防止近交，有必要提高使用种公牛家系的数量，每年都要计算近交系数和亲缘系数。

英文摘要:

      Abstract: The purpose of this experiment is to cultivate excellent populations through using the breeds of German Simmental (Fleckvieh cattle) and Australian Simmental cows, and the selection and mating of German Simmental ( Fleckvieh cattle) and local beef cows. the method is to use the R language programming program to calculate the number of 47 German Fleckvieh cattle The correlation coefficient and inbreeding coefficient among the offspring cows using individual cattle information and numbers, parental and grandparental generation information and numbers and adopting the calculation formula of inbreeding coefficient and kinship coefficient. The result is that there is no inbreeding among all individuals, and the coefficient of inbreeding is 0, and the value of the population kinship coefficient is between 0 and 0.5. The cattle herd in this experiment mainly come from self-breeding and self-bred cow farms. The inbreeding coefficient was well controlled during selection. However, from the perspective of the kinship coefficient, fewer breeding bulls were used in the herd. In order to prevent relative hybridization, it is necessary to increase the number of breeding bull families, and to calculate the coefficient of inbreeding and kinship every year. Keywords: Germany-Simmental（Fleckvieh cattle），coefficient of relationship, coefficient of inbreeding, R program, genealogy