棉花核不育系抗A_1育性转换不育株育性变化与温度的关系  

Relationship between fertility alteration of fertility-changing sterile plant of nucleus male sterile line Kang A_1 and temperature in cotton

作　　者：郝天峰[1] 何觉民[1] 郭宗学[1] 何仪[1] 

机构地区：[1]广东海洋大学农业生物技术研究所,广东湛江524088

出　　处：《广东农业科学》2007年第3期13-15,共3页Guangdong Agricultural Sciences

基　　金：广东省科技攻关项目(2005B26001083)

摘　　要：为了纯合棉花核不育系抗A1，使其不育株率由50％上升到10096，通过调节播种期，从不育株群体中发现了2株育性转换不育株，并对该育性转换不育株的育性变化与温度的关系进行了研究。结果表明，抗A1育性转换不育株属低温不育、高温可育类型，其育性转换临界温度在27～28℃之间，敏感时期为花前7～13天；在自交条件下，抗A1育性转换不育株的不育株率逐代提高，经过3代自交，其不育株率已达65％，有希望纯合。To get the homozygosis line of two- type nucleus male sterile line Kang A1 and enhance the sterile plant rate from 50% to 100%, the sowing date was adjusted and two fertility- changing sterile plants were found. Then the relationship between fertility alteration and temperature was studied. It was indicated that new temperature - sensitive male- sterile line cultivated from Kang A1 was sterile in low temperature and fertile in high temperature. The critical temperature of sterility transformation was 27-28℃and the sensitive time was 7- 13 days before blooming. The sterile plant rate of this nucleus sterile line was enhanced per - generation and it had reached 65 % affter 3 generation of self- bred. Therefore, it would be homozygous in Zhanjiang.

关 键 词：棉花核不育系 育性转换 温度 

分 类 号：S562[农业科学—作物学]