中粳型光敏感核不育31005S的育性研究  

Studies on the Fertility of 31005S -A Japonica HPGMR Line with Medium Growth Duration

作　　者：杨书化[1] 李泽炳[1] 万经猛[1] 靳德明[1] 毕春群 

机构地区：[1]华中农业大学农学系

出　　处：《杂交水稻》1991年第2期31-32,43,共3页Hybrid Rice

摘　　要：１９８９年７月下旬至８月上旬的异常低温对８ 月中旬前后抽穗的ＮＰＧＭＲ的育性产生了不同程度的影响。利用这种自然长日照低温条件，对同期抽穗的３１００５Ｓ、Ｗ７４１５Ｓ，农垦５８Ｓ等５个类型不育系的育性进行了鉴定。新育成的中粳型光放系３１００５Ｓ５３９株不育株率１００％，１４７株套袋自交小穗不育度达９９．９９％，花粉败育率为９９．０２％，与晚粳型的原始农垦５８Ｓ相当。因此初步认为３１００５Ｓ具有育性表达对低温反应不敏感的特点。由于其在短日照季节割蔸再生的自然结实率可达３３．１２％，表明其育性转换明显。The fertility of Hubei photoperiod sensitive genic male sterile lines in rice (HPGMR ) which headed in middle August was influenced differently by the abnormal lower temperature in central China in the midsummer of 1989. Under such an unusual climatic condition (long light duration and lower temperature ) the fertility of 5 HPGMR lines such as 31005S, Nongkeng 58S. etc. was identified.In the test the percentage of sterile plants among 539 plants of 31005S-a newly bred japonica HPGMR line with medium growth duration was 100%, the seed set fate of bagged heads in its 141 planets was less than 0.01 percent and the percentage of aborted pollens was 99.02% which was similar to that (99.01%) of the original Nongkeng 58S. Hence, it is considered that 31005S is insensitive to low temperature in expression of its sterility. The natural seed set rate of ratooning 31005S in the short day season may reach 33.12%, indicating that its fertility transformation is apparent.

关 键 词：杂交水稻 光敏感核不育 小穗育性 

分 类 号：S511.220.3[农业科学—作物学]