Fine mapping of a major quantitative trait locus, qFLL6.2, controlling flag leaf length and yield traits in rice (Oryza sativa L.)

文献类型： 外文期刊

第一作者： Shen, Bo

作者： Shen, Bo;Yu, Wei-Dong;Zhu, Yu-Jun;Fan, Ye-Yang;Zhuang, Jie-Yun;Shen, Bo;Yu, Wei-Dong;Zhu, Yu-Jun;Fan, Ye-Yang;Zhuang, Jie-Yun;Shen, Bo;Yu, Wei-Dong

作者机构：

关键词： Fine mapping;Flag leaf length;Quantitative trait locus;Residual heterozygote;Rice (Oryza sativa L.)

期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）

ISSN： 0014-2336

年卷期： 2012 年 184 卷 1 期

页码：

收录情况： SCI

摘要： Fine mapping of a quantitative trait locus, qFLL6.2, controlling flag leaf length (FLL) and yield traits in rice was conducted using four sets of near isogenic lines (NILs) that were developed from a common residual heterozygote at F-7 generation of the indica rice cross Zhenshan 97/Milyang 46. Each of the NIL sets consisted of 40 lines that are S-1 progenies of ten maternal homozygotes, ten paternal homozygotes, and 20 heterozygotes differing in a portion of the 1.19-Mb interval RM3414-RM6917 on the short arm of rice chromosome 6. Analysis of phenotypic differences among the three genotypic groups in each NIL set delimited qFLL6.2 to a 62.1-kb region flanked by simple sequence repeat marker RM3414 and sequence-tagged site marker Si2944. This QTL explained 52.73% of the phenotypic variance, and the Zhenshan 97 allele increased FLL by 2.40 cm. Based on data collected from homozygous lines of three of the NIL sets, qFLL6.2 was shown to have major effects on all the three yield traits analyzed, including the number of spikelets per panicle, the number of filled grains per panicle, and grain weight per panicle. A comparison of the different groups revealed that the effect of qFLL6.2 was highly consistent across different genetic backgrounds and environments, providing a good candidate for map-based cloning and investigating the source-sink relationship in rice.

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