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Identification and Fine Mapping of qCTH4, a Quantitative Trait Loci Controlling the Chlorophyll Content from Tillering to Heading in Rice (Oryza sativa L.)

文献类型： 外文期刊

作者： Jiang, Shukun 1 ; Zhang, Xijuan 1 ; Zhang, Fengming 1 ; Xu, Zhengjin 2 ; Chen, Wenfu 2 ; Li, Yuhua 1 ;

作者机构： 1.NE Forestry Univ, Postdoctoral Res Stn, Heilongjiang Acad Agr Sci, Cultivat & Farming Res Inst, Harbin 150086, Peoples R China

2.Shenyang Agr Univ, Key Lab Crop Physiol Ecol Genet & Breeding, Minist Agr, Shenyang 110866, Peoples R China

关键词： chlorophyll content;fine mapping;growth stages;rice

期刊名称：JOURNAL OF HEREDITY （ 影响因子：2.645； 五年影响因子：3.069 ）

ISSN： 0022-1503

年卷期： 2012 年 103 卷 5 期

页码：

收录情况： SCI

摘要： The chlorophyll content is one of the most important traits selected by breeders, and it is controlled by quantitative trait loci (QTLs) derived from natural variations in rice. We analyzed the QTL controlling chlorophyll content by using 94 RILs derived from a cross between 2 japonica rice cultivars, Lijiangxintuanheigu (LTH) and Shennong265 (SN265). Twenty-two QTLs controlling chlorophyll content at tillering stage, heading stage, and maturity stage were detected, respectively. Among them, Rice cv. LTH had a positive allele only at 1 locus (qCTH4) on chromosome 4. Further analysis indicated that the genetic effect of qCTH4 was the net effects within the period from tillering to heading. The QTL qCTH4 controlling chlorophyll content from tillering to heading locates between RM255 and RM349 on chromosome 4 with a LOD score 19.41, and the QTL qCTH4 explains 61.42% of phenotypic variation. In order to eliminate the influence of other QTLs, 1 single residual heterozygous plant, RH-qCTH4, was selected based on the genotypes of 114 Simple Sequence Repeat (SSR) markers. Using the segregating population derived from RH-qCTH4 by self-crossing, this region was narrowed down to an interval between RM3276 and RM17494 in an approximately 771 kb target region. These results are useful for map-based cloning of qCTH4 and for marker-assisted selection of high photosynthetic efficiency variety.

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