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家蚕各数量性状的遗传力大小是互不相同的。以过氧化氢酶、茧宽、茧长、茧层率、茧层量有较高的遗传力,全茧量、蛹重、五龄期经过,全龄期经过的遗传力较低。雌雄之间的遗传力大小亦各有不同,多数性状是雌大于雄。性状间的相关程度;遗传相关一般高于表现型相关,且两者的相关趋势一致。全茧量与蛹重、茧层量、茧长,茧层量与茧层率有较强的正相关。预期遗传进度以茧层量、产卵数较高,茧宽和茧层率居中,蛹重、全茧量和茧长较低。遗传力、遗传相关系数系非恒定值,因不同杂交组合,不同环境条件和不同计算方法而有差异。
The heritability of each quantitative trait of silkworm is different from each other. With catalase, cocoon width, cocoon length, cocoon layer rate, cocoon layer has a higher hereditary power, the amount of cocoon, pupal weight, after the age of five, all through the lower heritability. Heritability between the size of herd also vary, most traits are female than male. The correlation between traits; The genetic correlation is generally higher than that of the phenotype, and the correlation trends of the two are the same. The amount of cocoon and pupa weight, the amount of cocoon layer, cocoon length, cocoon layer and cocoon layer rate have a strong positive correlation. The expected genetic progress in the cocoon layer, the higher number of eggs, cocoon width and cocoon shell rate, pupal weight, cocoon volume and cocoon length lower. Heritability and genetic correlation coefficients are non-constant due to different hybridization combinations, different environmental conditions and different calculation methods.