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野败同型不育系“江农早 4号A” ,其保持系来源于“江农早 2号B”的姐妹系 ,经过 8年的选育 ,其株型与穗部性状得到明显改进 ,不育性稳定 ,配合力强 ,开花习性好 ,异交结实率高。用它配制的组合株型优良 ,抗性好 ,米质较优。分析了选育不育系的关键因素 ,提出了不育系选育标准并讨论了选育途径。
Wild-type homologous sterile line “Jiangnongzao 4 A”, its maintainer is derived from the “Jiangnongzao 2 B” sister system, after eight years of breeding, the plant type and ear traits have been significantly improved, Stable infertility, strong combining ability, good flowering habits and high rate of outcrossing. It is used to prepare the combination of excellent plant type, good resistance, better quality rice. The key factors of breeding CMS were analyzed, the breeding criteria of CMS was proposed and the breeding methods were discussed.