水稻籼粳杂交落粒性的遗传分析和基因定位  

Genetic analysis and mapping the shattering habit in rice ( Oryza Sativa L.)

作　　者：李仕贵[1] 马玉清[1] 何平[2] 黎汉云[1] 陈英[2] 周开达[1] 朱立煌[2] 

机构地区：[1]四川农业大学水稻研究所,中国温江611130 [2]中国科学院遗传研究所,中国北京100101

出　　处：《西南农业学报》1999年第S2期77-80,共4页Southwest China Journal of Agricultural Sciences

摘　　要：利用籼稻窄叶青8号和粳稻京系17的杂交F1、F2 以及衍生的DH系和回交群体, 对水稻籼粳杂交的落粒性进行遗传分析, 结果表明, 难脱粒对易落粒为显性,易落粒植株受两对隐性基因控制。应用DH系已构建的分子图谱将这两对落粒性基因定位于第1染色体的G270-RG541和第11染色体的G320-RZ638之间,分别定名为sh-4和sh-5; 该两对基因与经典遗传图谱上已定位的sh-2和sh-1位于相同的染色体, 但其遗传效应相反, 只有双隐性基因型(sh-4sh-4sh-5sh-5) 的植株才表现易落粒。Zhaiyeqing 8(ZYQ8) is a easy shattering indica cultivar,while Jingxi 17(JX17) is a difficult threshing japonica variety.In this study,genetic analysis for shattering habit was carried out in F1,F2 plants,and a doubled haploid (DH) population derived from the inter subspecific cross between ZYQ8 and JX17.The results showed that a easy shattering trait was controlled by two recessive genes.Based on a molecular linkage map of the DH population,the two genes were mapped on chromosomes 1 and 11;and just the same chromosomes as sh 1 and sh 2,but genetic effects was different.

关 键 词：水稻 籼粳杂交 落粒性 基因定位 

分 类 号：S511.2[农业科学—作物学]