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以计算机模拟的方法研究了方差协方差分析法计算的遗传相关系数的抽样分布,以及环境相关和遗传力对抽样分布的影响.遗传力和环境相关对遗传相关系数的绝对值大小和抽样分布有很大的影响。遗传力较高,环境相关较小时,遗传相关系数的分布特征与简单相关系数相似.有关性状的遗传力较低时,遗传相关系数的绝对值趋于增大,有时会出现大于1的异常情况,其分布也比简单相关系数更易出现非正态性.由于遗传力对遗传相关系数抽样标准误的影响,即使自由度相同,遗传相关系数在绝对值上仍无可比性,因此,遗传相关的通径分析是不合理的.
The sample distribution of genetic correlation coefficient calculated by variance covariance analysis and the influence of environment-related and heritability on sampling distribution were studied by computer simulation method.The absolute value and sampling distribution of genetic correlation and genetic correlation to genetic correlation coefficient Great impact. When the heritability is high and the environment is relatively small, the distribution characteristics of genetic correlation coefficient are similar to the simple correlation coefficient.When the heritability of the trait is low, the absolute value of the genetic correlation coefficient tends to increase, sometimes more than 1 anomaly , The distribution is also more prone to non-normal than the simple correlation coefficient.Because the heritability of the genetic correlation coefficient sampling standard error, even if the same degree of freedom, the genetic correlation coefficient in absolute value is still not comparable, so the genetic correlation Path analysis is not reasonable.