花椰菜熟期性状的遗传效应及其与环境互作分析

Analysis in genetic effects and genotype×environment interactions for maturity traits of cauliflower (Brassica oleracea var.botrytis L.)

以6个花椰菜亲本进行不完全双列杂交,对亲本和F1的营养生长期、结球期和成熟期三个熟期性状,采用加性—显性及与环境互作的遗传模型进行遗传分析。遗传方差分量的比率估算表明,各熟期性状除受制于遗传效应外,还会明显受到各遗传效应与环境互作效应的影响。其中,营养生长期和成熟期的表现主要以遗传效应为主,而结球期以遗传效应与环境互作效应为主。遗传效应的预测值表明,采用P1和P2较易获得早熟后代。

An incomplete diallel crossing experiment with six cauliflower inbred lines and their F_1 generation was conducted to evaluate the genetic effects of vegetative stage, heading stage, and maturity stage by using the additive-dominance model of genetic effects and genotype×environment interaction effects.The estimation of the proportions of genetic variance components to phenotypic variances indicated that all the maturity traits were significantly affected by genotype×environment interaction effects as well as by genetic effects. Both vegetative and maturity stages were mainly controlled by genetic effects, while heading stage was affected by genotype×environment interaction effects.The prediction of genetic effect value showed that the early-maturity progenies could be more likely segregated through selecting P_1 and P_2.