新质源粳稻不育系花粉败育特点及其潜在杂种优势(英文)  

Pollen Abortive Characters of New Cytoplasmic Male Sterile Lines and Their Potential Heterosis in Japonica Rice

作　　者：王石华[1] 张忠林[1] 谭学林[1] 文建成[1] 李伟华[1] 

机构地区：[1]云南农业大学稻作研究所,云南昆明650201

出　　处：《云南农业大学学报（自然科学版）》2009年第3期330-335,共6页Journal of Yunnan Agricultural University:Natural Science

基　　金：云南省"十一五"科技攻关项目(2006NG05);云南农业大学青年基金

摘　　要：目前,生产上应用的粳稻不育系细胞质遗传背景单一,开发新质源不育系显得尤为重要。花粉败育特点、不育的稳定性以及潜在的强杂种优势是不育系利用的前提条件。在不同温度条件下,调查了14份新质源不育系的花粉败育特点、育性稳定性和杂种优势。结果表明:9份不育系花粉的败育为典败和圆败,败育较彻底,但不能被滇一型或BT型恢复系恢复。另外5份不育系以染败为主均能被滇一型或BT型恢复系恢复,由南34、明恢63和NJ70507提供细胞质的3份不育系败育彻底,然而由D-7提供细胞质的2份不育系在高温下出现极少量的可育花粉。各杂交组合在同一性状上或同一杂交组合在不同性状上表现出的杂种优势有明显的差异。The exploitation of new cytoplasmic male sterile lines was especially important because the cytoplasm of CMS lines used commercially had narrow genetic background. The pollen abortive charac- ters, sterile stability and the strong potential heterosis are the prerequisites in commercially using a sterile line. Those characters of 14 new sources of cytoplasm male sterile lins under different tempera- ture were examined. The results showed that most pollen granules of 9 out of 14 CMS lines were mainly typical and spherical abortion and the pollen was aborted thoroughly, they could not be restored by re- storers of CMS-BT or CMS-Dianl. Most pollen granules of other 5 CMS lines were mainly stained abor- tion, and those CMS lines could be restored by restorers of above both types. In which three CMS lines with Nan34, Minghui63, and NJ70507 cytoplasm also were absolutely abortive; however, other two CMS lines with D-7 cytoplasm had very rare fertile pollen under high temperature. The heterosis and heterobehiosis for each character among combinations was different; also, in each combination for different characters was different.

关 键 词：新质源 粳稻 细胞质雄性不育系 败育特点 杂种优势 

分 类 号：S511.035.1[农业科学—作物学] S511.2