5460不育系育性转变敏感期试验初报  

A Preliminary Report on the Sensitive Period of Pollen Fertility Alternation in Male Sterile 5460 Indica Rice

作　　者：蔡俊迈 肖承和[1] 周元昌[1] 李维明[2] 

机构地区：[1]福建农学院农学系 [2]福建农学院作物遗传育种研究所

出　　处：《福建农学院学报》1990年第4期373-379,共7页

基　　金：福建省教委科学基金资助课题

摘　　要：在人工气候室条件下,采用16h 长光照高温35℃,16h 长光照常温25℃,12h 短光照高温35℃,12h 短光照常温25℃的设计。研究了5460不育系在不同生长时期不同温光组合处理的花粉育性反应.结果表明:(1)5460不育系的育性转变敏感期是在减数分裂期,离抽穗前11d 左右.在育性转变敏感期间,当温度为35℃时,无论光照是12h 还是16h,其不育株率和花粉的不育度均达到100%;而温度为25℃时,无论光照长短,其花粉的育性正常,花粉可染色率80%以上,可育株率100%.(2)播种后至减数分裂期前,不但光照长短对花粉的育性未见有效应,而且在高温和常温下亦未发现对育性有影响.Experiments were carried out in the phytotron to examine the responses of the pollen fertility of male sterile line 5460 in different growing stages to various combinations of temperature and daylength. The results indicated that the sensitive period of pollen fertility in male sterile 5460 was located at the meiotic stage,about 11 days before heading.During the sensitive period,35℃,would cause 100 percent sterility of pollen of all the male sterile plants tested,irrespective of 12 h short daylength or the 16 h long daylength;while under the condision of 25℃,the pollen fertility of all the male sterile plants were restored to normal,re- gardless of daylength.

关 键 词：水稻 光敏核不育 敏感期 光照 

分 类 号：S511.103[农业科学—作物学]