对两个表现型稳定一致的辐射大突变体杂交后代及两个原品种的杂交后代进行了遗传变异规律和选种效果的研究。主要结果:1.大突变体杂交后代单株生产力等经济性状的广义遗传力、遗传进度都优干原品种的杂灭后代。 2.大突变体间杂交后代的选种效果优于原品种的杂交后代,大突变体间杂交中选株率占总中选株率的86.1%,比原品种间杂交的13.9%高72.2%,并已初步选出了有希望的品种(系)。 The genetic variation and selection effects of two progeny hybrids and two progenies were studied. The main results are as follows: 1. The broad heritability of hybrid offspring per plant productivity and other economic traits of the broad heritability, genetic progress are superior varieties of offspring offspring. The selection effect of hybrids between large mutants was better than that of original hybrids. The rate of selected plants among the hybrids among the large mutants accounted for 86.1% of the total selected plants, which was 72.2% higher than that of the original hybrids Has been initially selected promising varieties (lines).