Mapping of QTLs associated with cold tolerance during the vegetative stage in rice

被引:214
作者
Andaya, VC
Mackill, DJ
机构
[1] Int Rice Res Inst, Plant Breeding Genet & Biochem Div, Metro Manilla, Philippines
[2] Univ Calif Davis, Dept Agron & Range Sci, Davis, CA 95616 USA
关键词
abiotic stress; cold tolerance; QTL mapping; rice;
D O I
10.1093/jxb/erg243
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Low-temperature stress is an important factor affecting the growth and development of rice (Oryza sativa L.) in temperate and high-elevation areas. Cold stress may cause various seedling injuries, delayed heading and yield reduction due to spikelet sterility. In this study, 181 microsatellite marker loci were used to identify quantitative trait loci (QTLs) associated with cold tolerance at the vegetative stage in 191 recombinant inbred lines (RILs) derived from a cross of a cold-tolerant temperate japonica cultivar (M-202) with a cold-sensitive indica cultivar (IR50). Different temperature regimes were applied in growth chambers on 191 RILs. The temperature regimes imposed in the growth chamber simulated cold-stress injuries at the seedling and late vegetative stages. In this study a major QTL was identified on chromosome 12, designated as qCTS12a, that was closely associated with cold-induced necrosis and wilting tolerance, and accounted for 41% of the phenotypic variation. A number of QTLs with smaller effects were also detected on eight rice chromosomes.
引用
收藏
页码:2579 / 2585
页数:7
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