Chinese Journal of Rice Science

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Identification of QTL Associated with Pre-Harvest Sprouting Traits in Rice

CHEN Hai-sheng , TAO Long-xing , WANG Xi , HUANG Xiao-lin , ZHUANG Jie-yun , ZHENG Kang-le
  

  • Received:1900-01-01 Revised:1900-01-01 Online:2006-05-10 Published:2006-05-10

水稻穗芽相关性状的QTL定位

陈海生;陶龙兴;王熹*;黄效林;庄杰云;郑康乐   

  1. 中国水稻研究所 水稻生物学国家重点实验室, 浙江 杭州 310006

Abstract: A recombinant inbred line(RIL) population including 305 lines, derived from a cross between indica rice(Oryza sativa L.) Zhong 156 and Gumei 2 was used to detect quantitative trait loci(QTLs) conferring pre-harvest sprouting. Three QTLs controlling panicle sprouting index (PSI) were detected on chromosomes 2, 9 and 11, three QTLs controlling pre- harvest sprouting speed (PDS) on chromosomes 1, 3 and 6, three QTLs for panicle sprouting rate by panicle (PSRp, percentage of panicles with 3 sprouting grains) on chromosomes 1, 9 and 10, and two QTLs conferring panicle sprouting rate by grain (PSRg, percentage of sprouting grains) on chromosomes 9 and 11, respectively. Meanwhile, nine pairs of epistatic loci affecting PSI, PDS, and PSRg were also detected (three pairs for each trait).

Key words: pre-harvest sprouting index, recombinant inbred line, quantitative trait locus, rice

摘要: 利用305个株系组成的源自籼稻品种中156和谷梅2号的重组自交系群体进行了水稻穗芽性状的QTL检测和遗传效应分析。以穗芽指数及相关指标作为穗芽性状的表型值,采用QTL Mapper 1.01统计软件进行QTL定位和上位性分析,共检测到控制穗芽指数的3个加性效应QTL,分别位于第2、9、11染色体上;控制穗芽速率的加性效应QTL 3个,分别位于第1、3、6染色体上;控制穗穗芽率的加性效应QTL 3个,分别位于第1、9、10染色体上;控制粒穗芽的加性效应QTL 2个,分别位于第9、11染色体上。还检测到3对影响穗芽指数的加性×加性上位性互作效应QTL;3对控制穗芽速率的上位性QTL和3对控制粒穗芽率的上位性QTL。

关键词: 穗芽指数, 重组自交系, 数量性状座位, 水稻