经离子束诱变处理的新广亲和系,影响其产量的主要因素是有效穗数、每穗实粒数和千粒重,三者对产量具有均等的贡献。亲子代性状之间相关分析表明:通过选用千粒重大,每穗实粒数多、株高较矮、全生育期适中的亲本,能达到改善杂优组合的目的。遗传力高的较为稳定的性状,诱变后变异幅度不大,育种上最好选择杂合体进行离子束诱变处理。 The main factors affecting the yield of new broad-compatibility lines treated by ion beam mutagenesis are effective spikes, grains per spike and 1000-grain weight, all of which have equal contribution to yield. Correlation analysis between parent-offspring traits showed that the purpose of improving heterosis combinations could be achieved through the selection of a thousand-grain-size kernel with more grains per panicle, shorter plant height, and a full-term parent. High heritability of the more stable traits, mutagenesis range of variation, the breeding of the best choice of hybrids for ion beam mutagenesis.