Efficacy of qFL-chr1, a Quantitative Trait Locus for Fiber Length in Cotton (Gossypium spp.)

文献类型： 外文期刊

第一作者： Shen, Xinlian

作者： Shen, Xinlian;Singh, Rippy;Lubbers, Edward L.;Chee, Peng W.;Shen, Xinlian;Cao, Zhibin;Xu, Peng;Smith, C. Wayne;Paterson, Andrew H.

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关键词： genetic markers;crop improvement;fiber length;genome composition

期刊名称：CROP SCIENCE （ 影响因子：2.319； 五年影响因子：2.631 ）

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年卷期：

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收录情况： SCI

摘要： In an earlier advanced-backcross quantitative trait locus (QTL) analysis of an interspecifi c Gossypium hirsutum L. x Gossypium barbadense L. population, 28 fiber length QTLs were identified including qFL-chr1 on chromosome 1 of the A-subgenome. The G. barbadense allele at this QTL contributed to longer fibers and explained up to 24% of the phenotypic variance. To substantiate the association of this genomic region with fiber length, three BC3F2 plants heterozygous for the genetic markers that delineate the qFL-chr1 QTL were selected to construct three independent populations of near-isogenic intro-gression lines (NIILs). The efficacy of qFL-chr1 was evaluated among 140 NIILs grown in 2 yr. The results support the positive effect of qFL-chr1 on fiber length. A single NIIL, R01-40-08, had about 94.3% of recurrent genome composition and significantly longer fiber than the recurrent parent when grown in Nanjing, China. Therefore, in addition to confirming the efficacy of qFL-chr1 to enhance fiber length, this work provides a valuable genetic resource for the improvement of cotton.

分类号： S5

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