一个水稻双子房突变体的表型鉴定和遗传分析  

Phenotypic and Genetic Characterization of a Twin-ovary Mutant(TOR) in Rice

作　　者：文雯[1,2] 李双成[1,2] 王世全[1,2] 何体宏[1,2] 李平[1,2] 

机构地区：[1]四川农业大学水稻研究所,四川温江611130 [2]四川农业大学作物基因资源与遗传改良教育部重点实验室,四川雅安625014

出　　处：《中国水稻科学》2007年第3期253-258,共6页Chinese Journal of Rice Science

基　　金：国家863计划资助项目(2006AA10A103);长江学者和创新团队发展计划资助项目(IRT0453)

摘　　要：在籼稻保持系C2与绵香5B的杂交后代中发现了一个植株显著矮化的双子房突变体。该突变体花器官主要表现为:雄蕊数目减少,雌蕊增加,双子房,多柱头,胚囊畸形,有雄蕊雌蕊化现象。由于其高度不育,突变性状采用杂合体保存,经5代连续自交,均表现稳定遗传特性。同时,杂合株系呈典型的3∶1分离比例,表明该突变性状由单隐性基因控制,并将该突变体暂时命名为TOR。A rice floral mutant with twin-ovary and dwarf plant was isolated from the progenies of the combination of C2/ Mianxiang 5B. By anatomical observations, the mutant was characterized with the phenotypes of fewer stamens, more pistils and stigmaS, twin-ovary, malformed embryo sac, as well as stamen-originated pistils. Due to its exceeding sterility, the mutation was maintained by heterozygotes, and it was also inherited stably after five generations of self-pollination. The segregation ratio of wild type plants to mutant plants in the population degenerated from heterozygotes was 3 ： 1, indicating that the mutant is controlled by a single recessive gene, and designated tentatively as TOR.

关 键 词：水稻 双子房突变体 花器官 遗传分析 基因 

分 类 号：S511[农业科学—作物学]