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采用数量性状的加性-显性遗传模型、发育遗传模型分析了水稻谷粒重在不同发育时期的2季资料,估算水稻谷粒重某一发育时间(0→t)或某一特定发育时间段(t-1→t)的遗传效应。结果表明,早季谷粒发育动态主要受显性效应控制,在谷粒充实的第9～12天显性效应基因急剧增加,加性效应在谷粒充实的前期几乎不表达,后期虽有表达,但作用微小;晚季谷粒充实过程受加性和显性效应的交替影响,谷粒充实早期(第3～6天)以加性效应为主,中期(第9～15天)以显性效应为主,后期(第18～30天)以加性效应为主。早季谷粒充实的全过程,显性效应基因强烈表达,且发育全过程变化幅度较大;晚季加性和显性效应基因共同控制各粒充实,但以加性效应为主,总遗传效应变化幅度较早季小。加性效应基因和显性效应基因的交替作用有利于谷粒的灌浆结实。
Based on the additive-dominance genetic model of quantitative traits and the genetic model of development, the 2-season data of rice grain weight at different developmental stages were analyzed to estimate the grain weight of a certain developmental time (0 → t) or a specific developmental time Segment (t-1 → t) of the genetic effect. The results showed that the development of early grain maturity was mainly controlled by the dominant effect, and the dominant effect gene increased sharply on the 9th to 12th day of grain filling. The additive effect was hardly expressed in the early stage of grain filling, , But the effect was slight. The grain filling process in late season was affected by the alternation of additive and dominant effects. In the early stage of grain filling (days 3 to 6), the additive effect was the main effect. In the middle period (days 9-15) The main effect of sexual, late (18-30 days) with additive effect based. In the whole process of grain filling in early season, the dominant effect gene was strongly expressed and the whole process of development varied greatly. The late season additive and dominant effect genes co-controlled each grain filling, but with additive effect, the total genetic The effect of the magnitude of change in the earlier quarter is small. The alternation of additive effect gene and dominant effect gene is beneficial to grain filling and fruiting.