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采用可以估算不同发育时期基因累加效应和特定发育时期净遗传效应的遗传模型和统计分析方法,研究油菜角果成熟过程中其重量的发育遗传规律.结果表明,控制不同发育时期油菜角果重量表现的基因累加效应以加性效应为主,仅在第22d时其显性效应大于加性效应.条件分析的结果表明,控制角果重量的基因在角果多数发育时期中均有新的表达,且其表达方式有所不同,其中角果重量的净遗传效应表达量以开花后第16～22d最大.角果重量在不同发育时刻具有较高的狭义遗传率,低世代选择可以取得良好的育种效果.亲本遗传效应分析表明,双20-4、中R-888和Tower3个亲本有利于增加杂种后代的角果重量,其中以中R-888最优.杂种优势分析表明,角果发育的前中期(16～29d)群体平均优势明显大于其他发育时期.
Genetic models and statistical analysis methods that can estimate gene accumulation effects at different developmental stages and net genetic effects at specific developmental stages were used to study the developmental genetic rules of their weight in the ripening process of rape cotyledons.The results showed that controlling the weight of rape cedar at different developmental stages The additive effect was the main additive effect of gene, the dominant effect was greater than the additive effect only at the 22nd day.The results of conditional analysis showed that the genes controlling the weight of pod had new expression in most developmental stages of pod, The expression of net genetic effects of pod weight was the largest at 16-22 days after flowering.The pod weight had a higher narrow heritability at different developmental stages and the lower generation selection could achieve good breeding The results showed that the double crosses 20-4, middle R-888 and Tower 3 parents were beneficial to increase the pod weight of the hybrid offspring, among which the optimum R-888.Analysis of heterosis showed that before the development of pod Mid-term (16 ~ 29d) population average advantage was significantly greater than other developmental stages.