| QTLs Analysis of Cold Tolerance During Early Growth Period for Rice |
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| 作者姓名： | HAN Long-zhi QIAO Yong-li CAO Gui-lan ZHANG Yuan-yuan AN Yong-ping YE Jong-doo KOH Hee-jong |
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| 作者单位： | 1.Institute of Crop Germplasm Resources, Chinese Academy of Agricultural Sciences, Beijing 100081, China;2.School of Plant Science, College of Agriculture and Life Science, Seoul National University, Seoul 151-742, Korea;3.Crop Research Institute, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750105, China;4.National Institute of Crop Science, Rural Development Administration, Suwon 441-857, Korea |
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| 摘 要： | The quantitative trait loci (QTLs) for cold tolerance during early growth period were identified using a F2:3 population (including 200 individuals and lines derived from a cross between indica rice and japonica rice ‘Milyang 23/Jileng 1’) with microsatellite markers. The cold tolerance at the seedling and tillering stages, and the growth ability of seedling under low temperature conditions were evaluated. All of the traits associated with cold tolerance at early growth stages appeared a continuous distribution near to normal in F3 lines, these were inherited as quantitative traits controlled by polygenes. Three QTLs on chromosomes 1, 5 and 9, which associated with cold tolerance at the seedling stage were detected. Among them, qCTS1 accounted for 15.5% of observed phenotypic variation; Five QTLs on chromosomes 2, 3, 7, 9 and 11, associated with cold tolerance at the tillering stage were found, which explained lower percentage of observed phenotypic variation; Four QTLs on chromosomes 1, 2, 11 and 12, which associated with the growth ability of seedling under low temperature conditions were found, among them, qGAS2 and qGAS12 explained 26.6 and 42.9% of observed phenotypic variation, respectively, which were major genes.
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| 关 键 词： | rice early growth period cold tolerance quantitative trait locus |
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