中国农业科学（英文版）2004，Vol.3Issue(11)：801-806,6.
Molecular Mapping of QTLs for Cold Tolerance at the Budburst Period in Rice
Molecular Mapping of QTLs for Cold Tolerance at the Budburst Period in Rice
摘要
Abstract
The quantitative trait loci (QTLs) for cold tolerance at the budburst period (CTBP) was identified using a F2:3 population including 200 lines derived from a cross of indica and japonica Milyang23/Jilengl. A molecular linkage map of 97 SSR markers was constructed using interval mapping and covered a total length of 1 357.3 cM with an average distance of 13.99cM, between adjacent markers in rice genome. The CTBP of F3 lines was evaluated at 5℃, and the survival seedling rate after treating under low temperature at the budburst period was used as cold tolerance index for CTBP. A continuous distribution near to normal for CTBP was observed in F3 lines, CTBP is a quantitative trait which was controlled by some genes. Three QTLs on chromosomes 2, 4 and 7 which are associated with CTBP were detected on location of RM6-RM240, RM273-RM303, RM214-RMll, respectively,which explained the range of the observed phenotypic variance from 11.5 to 20.5%. qCTBP4detected on RM273-RM303 of chromosome 4 explained 20.5% of the observed phenotypic variance. The effect of qCTBP4's allelic gene comes from Jileng 1.关键词
Rice/Cold tolerance at the budburst period (CTBP)/Microsatellite marker/QTLKey words
Rice/Cold tolerance at the budburst period (CTBP)/Microsatellite marker/QTL引用本文复制引用
QIAO Yong-li,HAN Long-zhi,AN Yong-ping,ZHANG Yuan-yuan,CAO Gui-lan,Koh Hee-jong..Molecular Mapping of QTLs for Cold Tolerance at the Budburst Period in Rice[J].中国农业科学（英文版）,2004,3(11):801-806,6.基金项目
This work was supported by the National Natural Science Foundation of China (30070421), the 10th Five-Year National Key Research Program (2001BA511B02) and Cooperative Research Between China and Korea (2002-2004). （30070421）
