【摘要】 观察了113个育性稳定的滇1型细胞质雄性不育系(A)及其保持系(B)的花时特性,结果表明,不育系与保持系的单穗花期为5～10 d,大部分材料为6～7 d;不育细胞质对花时有影响,94%的不育系花时较其相应保持系晚,平均晚约40 min;根据不育系和保持系的花时早晚、花时相遇情况等将其分为4种类型。提出滇1型粳稻不育系优良花时性状的2个评价指标:一是不育系的始盛花时间不迟于14:00;二是不育系的理论有效相遇颖花率在70%以上。更多还原

【Abstract】 The flowering time traits of 113 japonica Dian 1 type CMS(CMS-D1) lines and their maintainer lines were surveyed.The results showed that the flowering period of a single panicle varied from 5 to 10 days among the tested CMS-D1 lines and their maintainer lines but from 6 to 7 days for most of them.It was found that the male sterile cytoplasm of Dian 1 type had a distinct effect on flowering time.94% of the CMS-D1 lines had a later initial blooming time than their corresponding maintainer lines,with an average of delayed initial blooming time at about 40 minutes.Based on the blooming time and flowering synchronization,the CMS-D1 lines were grouped into four types.Furthermore,two indices were proposed for evaluation of desirable flowering time traits of CMS-D1 lines.One was the initial full blooming time no later than 14: 00 and the other was the theoretical rate of effectively synchronized spikelets over 70%.更多还原