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估测遗传参数,主要是估计性状的育种值方差和育种值间的协方差。应用半同胞间的协方差估计四分之一的育种值方差,则是当前我国用于估计遗传力的一种切实可行的方法。而半同胞间的协方差则是用公畜间的方差估计的,因此,把公畜作为影响数量性状的一个因素进行分析,所求出的公畜间的方差,可用于估测遗传参数。现将福州北郊约克猪繁殖性状参数的估测结果及多因素方差求法在估测中的应用报道如下:
Estimating genetic parameters is mainly the estimation of covariance between the breeding values and the breeding values of the traits. Applying the semi-sibling covariance to estimate the one-fourth of the breeding value variance is a practical method for estimating heritability in our country. However, the covariance between half-sibs is estimated by using the variance between offspring. Therefore, using the male as a factor affecting the quantitative trait, the variance between the fowls can be used to estimate the genetic parameters. Fuzhou is now the northern suburbs of York pig reproductive traits and multi-factorial estimation of variance estimation method in the estimation of the application reported as follows: