摘要
水稻品种的抽穗期是重要农艺性状之一,鉴定和定位抽穗期基因,分析其遗传效应对改良水稻抽穗期至关重要。在水稻品种Nipponbare中发现一个早抽穗植株,经过多代自交获得稳定的早抽穗突变株,突变体ehd(t)比Nipponbare早抽穗15 d。遗传分析表明,该突变受1对显性核基因控制,暂命名为EHD(t)。通过2个F2定位群体,利用微卫星标记将EHD(t)定位于第8号染色体RM223和RM584之间,其遗传距离分别为5.2 cM和6.1 cM。
Rice heading date is an important agronomic trait.Mapping heading date gene is important for rice improvement.A rice（Oryza sativa L.）mutant with a early heading date,designated as edh（t）,was found from a japonica rice variety Nipponbare.This early heading date mutant phenotype was stably expressed through successive five self-crossed generations,and its heading date was earlier 15 days than that in wild-type.Genetic analysis showed that the phenotype of edh（t）was controlled by a single dominant nuclear gene,temporarily designated as EHD（t）.By means of molecular marker technique,the EHD（t） gene was mapped to an interval between two SSR markers RM223 and RM584 on chromosome 8 with two F2 segregating population,with genetic distances of 5.2 cM and 6.1 cM to each marker respectively.This is the basis for marker-assisted selection and map-based coloning this EHD（t） gene.
出处
《华北农学报》
CSCD
北大核心
2011年第6期55-58,共4页
Acta Agriculturae Boreali-Sinica
基金
河南省科技攻关资助项目(102102310318)
河南省教育厅资助项目(2010A210021)
关键词
水稻
早抽穗基因
遗传分析
基因定位
Rice
Early heading date gene
Genetic analysis
Molecular mapping
