中国水稻科学2017，Vol.31Issue(3)：257-264,8.DOI:10.16819/j.1001-7216.2017.6172
稻米垩白性状对高温耐性的QTL分析
Identifying QTLs for Thermo-tolerance of Grain Chalkiness Trait in Rice
摘要
Abstract
[Objective]The molecular markers linked to high temperature tolerance of rice appearance quality were screened for the purpose of providing an important foundation of improvement for rice grain quality. [Method]The quantitative trait loci (QTLs) for heat tolerance of grain chalkiness trait were identified using the recombinant inbred lines(RILs) derived from a cross between the heat tolerant rice line 996 and the heat sensitive line 4628. The heat tolerance indexes of chalky grain rate, chalkiness size and chalkiness degree were used as the heat-tolerance indicators.[Result]24 QTLs for heat tolerance of grain chalky traits were detected in two years by using composite interval mapping analysis including eight for heat tolerance of chalky grain rate(HTCGR), twelve for heat tolerance of chalkiness size and fourteen for heat tolerance of chalkiness degree(HTCD). Two HTCGR QTLs on chromosome 6 and two HTCD QTLs on chromosome 7 could be detected repeatedly in two years. The two HTCD sites coincided with two HTCGR sites on chromosome 7 detected in 2015. Moreover, anyone of the four pleiotropic QTLs had impacts on the chalky grain rate, chalkiness size and chalkiness degree. [Conclusion]The QTL controlling the heat tolerance index of chalkiness degree qHTCGR6.1 and the QTL controlling the heat tolerance of chalkiness degree qHTCD7.1 might be new findings..关键词
稻米/垩白性状/高温耐性/数量性状基因座位Key words
rice/chalkiness trait/thermo-tolerance/quantitative trait locus分类
农业科技引用本文复制引用
张桂莲,廖斌,唐文帮,陈立云,肖应辉..稻米垩白性状对高温耐性的QTL分析[J].中国水稻科学,2017,31(3):257-264,8.基金项目
国家自然科学基金资助项目(30900874) （30900874）
湖南省自然科学基金资助项目(11JJ3026) （11JJ3026）
湖南省科技计划博士后专项(2012RS4037) （2012RS4037）
湖南省教育厅重点项目(17A100) （17A100）
作物学开放基金资助项目(ZWKF201504). （ZWKF201504）
