用计算机模拟的方法,比较 NC I、NCⅡ和 DIA 3种交配设计在不同遗传组成的群体中估计遗传力、显性比的可靠性;研究了等位基因频率、显性比,遗传力和近交系数对估计遗传参数的影响.结果表明:1.总体上说3种设计以 NCⅡ设计估计参数最好,DIA 设计次之,NCI 设计最差.2.群体的遗传组成成分对各种设计估计遗传参数有显著影响.3.在任何情况下,3种交配设计估计遗传力比估计显性比较为可靠;NCI 设计估计显性比的可靠性最低. The reliability of heritability and dominant ratio in three populations of NC I, NCⅡ and DIA was compared by computer simulation. The allele frequency, dominant ratio, heritability, The results showed that: 1. Overall, the three design parameters were the best in terms of NC Ⅱ design design, followed by DIA design and the worst in NCI design.2.The genetic composition of the population estimated various design parameters Genetic parameters had significant effects.3.In any case, the estimated heritability of three kinds of mating designs was more reliable than the estimated ones; the reliability of NCI design was the lowest.