光温敏核不育系再生稻的育性变化研究  

Fertility alteration in ratoon plant of Indica photo-thermo sensitive genic male sterile line

作　　者：黄永相[1,2] 郭建夫[1] 张建中[1] 何觉民[1] 陈志强 

机构地区：[1]广东海洋大学农学院,广东湛江524088 [2]国家植物航天育种工程技术研究中心,广东广州510642

出　　处：《湖南农业大学学报（自然科学版）》2013年第1期13-16,共4页Journal of Hunan Agricultural University(Natural Sciences)

基　　金：广东省科技计划重大专项项目(2002A2010111;A2006010101)

摘　　要：以4个光温敏核不育系(培矮64S、GD1S、N9S和海3S)为供试材料,研究在自然条件下再生稻与头季稻的育性差异及其与光温因子的关系。结果表明:与头季稻相比,光温敏核不育系再生稻的不育期明显缩短,育性大幅度提高,各不育系间的再生稻育性恢复程度存在差异;在同一不育系中,创伤性(割蔸、拔穗)再生稻与生理性再生稻的育性变化差异不明显;再生稻的可育花粉率与光温因子多数呈极显著或显著负相关,其光温敏感性较头季稻增强;再生稻育性比头季稻提高的原因与其育性转换起点温度提高有关,4个不育系再生稻的育性转换起点温度比头季稻平均高2.8℃。In order to study the difference in fertility alteration between the main-crop and the ratoon plant of photothermo sensitive genic male sterile （P/TGMS） of rice and its correlation to photoperiod and temperature, four P/TGMS lines （Pei＇ai64S, GD1 S, N9S and Hai3S） were observed under natural conditions in Zhanjiang. The results showed that the ratoon plants of P/TGMS lines had shorter sterile periods but higher fertilities than that of the main-crop, and the degrees of fertility restoration of the ratoon plants among four P/TGMS lines were different. In the same P/TGMS line, however, no difference could be found between ratoon plants caused by trauma or physiological factors. Majority of the coefficients between the pollen fertility of the ratoon plants and the temperature and day length were negatively or significantly negatively related, suggesting that the ratoon plants were more sensitive to temperature and day length compared with its main-crop. The fertility alteration of the ratoon plants could be caused by the increased critical temperature of fertility alteration, and critical temperature of fertility alteration of the ratoon plants were in mean 2.8 ℃ higher than that of the main-crop in four P/TGMS lines.

关 键 词：水稻 光温敏核不育系 再生稻 育性 

分 类 号：S511.035[农业科学—作物学]