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家蚕的许多经济指标都是微效多基因控制的数量性状。研究其基因效应,可以明了微效多基因的作用方式,为制定育种方案提供参考。但这方面国内的研究报道很少,国外只见大(?)(1964)、江口(1985、1986)等用双列杂交法作过一些研究。他们认为,全茧量、茧层量、解舒率、纤度、化蛹率、产卵数和孵化率有上位性效应存在;茧层率、茧丝长、出丝率、净度和五龄发育速度符合加性——显性模型。茧丝长、出丝率、净度和五龄发育速度的加性作用大于显性作用,全茧量和茧层量的显性作用大于加性作用。但有的文章在上位性效应存在的情况下,仍按加性——显
Many of the economic indicators of silkworms are quantitative traits controlled by micro-multi-gene. Studying its gene effect, we can understand the mode of action of the micro-multi-gene and provide a reference for formulating the breeding program. However, few studies have been reported in this area in China. Only a large number of foreign countries (1964) and Jiangkou (1985 and 1986) made some studies using the double-line hybridization method. They believe that there is an epistatic effect on the amount of cocoon, the amount of cocoon layer, unwinding rate, fineness, pupation rate, egg number and hatching rate. The cocoon shell rate, cocoon filament length, Development speed in line with additive - dominance model. The additive effect of cocoon length, outlet rate, clarity, and fifth-growth rate was greater than that of dominant effect, and the dominant effect of total cocoon amount and cocoon layer amount was greater than that of additive effect. However, some articles in the case of epistatic effects exist, still according to the additive - significant