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通过对4个新育成的籼型雄性不育系的生育特性与柱头活力进行系统观察,结果表明:4个新育成的不育系农艺性状优良、育性稳定,套袋无自交结实情况。其中412A柱头外露率最高达89.20%,558A、698A柱头外露率与对照Ⅱ-32A相当,也都高于83%。412A的柱头活力保持时间最长且柱头活力下降较慢。通过观察研究认为,4个新不育系其各项育种指标较为完善,主要农艺性状优于Ⅱ-32A,具有一定的应用价值。
Through the systematic observation on the fertility and stigma activity of four new indica CMS lines, the results showed that the four new CMS lines were excellent in agronomic traits, stable in fertility and without selfing. Among them, the stigma exsertion rate of 412A was up to 89.20%, and the stigma exsertion rates of 558A and 698A were similar to those of the control Ⅱ-32A, all higher than 83%. 412A stigma maintained the longest vitality and stigma decreased slowly. According to the observation and research, the four new CMS lines have perfect breeding indexes and the main agronomic traits are better than Ⅱ-32A, which has certain application value.