Fine mapping a QTL qCTB7 for cold tolerance at the booting stage on rice chromosome 7 using a near-isogenic line

文献类型： 外文期刊

第一作者： Zhou, Lei

作者： Zhou, Lei;Zheng, Weiwei;Tang, Bo;Zhang, Hongliang;Li, Jinjie;Li, Zichao;Zhou, Lei;Zheng, Weiwei;Tang, Bo;Zhang, Hongliang;Li, Jinjie;Li, Zichao;Zeng, Yawen;Yang, Shuming

作者机构：

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2010 年 121 卷 5 期

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收录情况： SCI

摘要： Low temperature at the booting stage is a serious abiotic stress in rice, and cold tolerance is a complex trait controlled by many quantitative trait loci (QTL). A QTL for cold tolerance at the booting stage in cold-tolerant near-isogenic rice line ZL1929-4 was analyzed. A total of 647 simple sequence repeat (SSR) markers distributed across 12 chromosomes were used to survey for polymorphisms between ZL1929-4 and the cold-sensitive japonica cultivar Towada, and nine were polymorphic. Single marker analysis revealed that markers on chromosome 7 were associated with cold tolerance. By interval mapping using an F(2) population from ZL1929-4 x Towada, a QTL for cold tolerance was detected on the long arm of chromosome 7. The QTL explained 9 and 21% of the phenotypic variances in the F(2) and F(3) generations, respectively. Recombinant plants were screened for two flanking markers, RM182 and RM1132, in an F(2) population with 2,810 plants. Two-step substitution mapping suggested that the QTL was located in a 92-kb interval between markers RI02905 and RM21862. This interval was present in BAC clone AP003804. We designated the QTL as qCTB7 (quantitative trait locus for cold tolerance at the booting stage on chromosome 7), and identified 12 putative candidate genes.

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