水稻显性早熟基因Ef-cd的分离鉴定和早熟效应分析  

Isolation,Identification and Earliness Effect Analysis of Rice Dominant Earliness Gene Ef-cd

作　　者：邓晓建[1] 王平荣[1] 李秀兰[1] 董春林[1] 杨志荣[2] 

机构地区：[1]四川农业大学水稻研究所,成都611130 [2]四川大学生命科学学院,成都610064

出　　处：《中国农业科学》2005年第5期859-864,共6页Scientia Agricultura Sinica

基　　金：国家自然科学基金资助(30070469)

摘　　要：Ef-cd基因是位于水稻第3染色体短臂上的一个显性早熟基因。本研究以早籼核不育系6442S-7为Ef-cd基因的供体亲本,通过连续回交与自交以及分子标记辅助选择,分离了Ef-cd基因,分别构建了以迟熟籼稻品系明恢63、蜀恢881和蜀恢527为受体亲本(遗传背景)的近等基因系,并在此基础上探明Ef-cd基因在纯合及杂合状态下一般可使水稻提早抽穗11～14d。Ef-cd基因对促进水稻早熟与高产的有机结合,快速、高效培育出早熟超高产新品种具有重要意义。Ef-cd gene is a dominant earliness gene located on the short arm of rice chromosome 3. In this paper, through continuous backcross, self-pollination and molecular marker assisted selection, individual Ef-cd gene was isolated and nearly isogenic early-maturing lines were constructed by using a genic male-sterile and early-maturing indica line 6442S-7 as donor, and late-maturing indica lines Minghui 63 (MH 63), Shuhui 881 (SH 881) and Shuhui 527 (SH 527) as recipients (genetic background), respectively. Further, it was found out that Ef-cd gene could generally advance rice to head 11-14 days earlier. So, it is considered that Ef-cd gene has an important role in rapid developing early-maturing and super high-yielding rice varieties.

关 键 词：水稻 显性早熟基因 Ef-cd 分离 鉴定 早熟效应 生育期 

分 类 号：S511[农业科学—作物学]