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为了研究稻米蛋白质含量的遗传,以不同蛋白质含量的水稻品种进行了四个组合的正反交,测定其后代.F_2的蛋白质含量,呈近似常态分布的连续变异,它的平均值介于两亲之间而偏于某一方.F_2的方差与变异系数,全部组合都大于亲本,说明有可能获得大幅度变异的杂种群体.F_2群体的广义遗传力为39～78%.F_2与F_3上下代相关也是显著的(r=0.515;r=0.635).从这些结果得到稻米蛋白质含量是受多基因支配的启发.F_2的分布显示了有关遗传因子存在着优势效果.从遗传力与上下代相关情况看,早代选择是有效的.
In order to study the inheritance of protein content in rice, four combinations of reciprocal crosses between rice cultivars with different protein content were used to determine their progenies.The protein content of F2 was a continuous variation with approximate normal distribution with an average of two parents And the variance between F2 and F2 was greater than that of the parent, which indicated that it was possible to obtain a large variation of hybrid population.The general heritability of F2 population was 39-78% .F2 was related to F_3 Is also significant (r = 0.515; r = 0.635) .From these results, we can find that rice protein content is dominated by polygenes.F2 distribution shows the advantage of genetic factors.From the perspective of heritability and the previous generation Early selection is effective.