三系杂交粳稻新不育系鄂粳A的选育与应用研究

摘要

介绍了茶野型粳稻雄性不育系鄂粳A 的选育过程、特征特性及恢保关系。鄂粳 A不育性稳定，不育株率100%，不育度99.8%，花粉败育以典败为主，占98%以上，柱头外露率48.2%，异交结实率30%～50%，在武汉5月上旬至6月中旬播种，播始历期为78～90 d，属感温性粳稻类型，配合力较好，品质优良。%The Chaling wild abortive type (CL-type) cytoplasmic male sterile line, E-Jing A, was characterized by stable sterility with a sterile plant percentage of 100%, a pol en sterile degree of 98% with dominated typical abortive pol ens, and showed the characteristics of good outcrossing with a stigma exsertion rate of 48.2% and an outcrossing rate varied from 30% to 50%, good combining ability, and fine grain quality. E-Jing A was sensitive to temperature. Its duration from sowing to heading was 78-90 d when it was sown from mid May to early June at Wuhan. The breeding procedure of E-Jing A and its characteristics, relationship of restoring and maintaining were introduced.