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以高抗赤星病烟草品种净叶黄(JYH)、Beinhart1000-1(Beinhart)和感病品种NC82为材料分别构建了2个杂交组合的P1、P2、F1、F2四世代群体,成熟期赤星病菌人工接种鉴定后,采用主基因+多基因混合遗传模型对JYH和Beinhart两个材料进行抗性分析,结果表明,两者的赤星病抗性均受两对加性-完全显性主基因+加性-显性多基因控制。组合1的加性效应以第1对主基因为主,且多基因的加性效应大于显性效应;组合2的两对主基因负向加性效应相等,且多基因的显性效应大于加性效应;2个组合F2群体主基因遗传率分别为64.72%和63.88%,表明赤星病的抗性遗传以主基因效应为主,并且受环境影响较大。
Two populations of F1, P2, F1 and F2 were constructed from JYH, Beinhart1000-1 (Beinhart) and NC82 (susceptible cultivar NC82), respectively. After artificial inoculation, the resistance genes of JYH and Beinhart were analyzed by using mixed gene model of major gene plus polygene. The results showed that the resistance of two plants to the disease were affected by two pairs of additive - dominant dominant genes + Sex - dominant polygenic control. The additive effect of combination 1 is dominated by the first pair of major genes, and the additive effect of multiple genes is greater than the dominant effect; the negative additive effects of two pairs of major genes of combination 2 are equal, and the dominant effect of multiple genes is greater than The main heritability of two F2 populations was 64.72% and 63.88%, respectively, indicating that the inheritance of resistance to brown spot disease was dominated by major gene effect and was greatly influenced by the environment.