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

文献类型： 外文期刊

作者： Shen, Xinlian 1 ; Cao, Zhibin 2 ; Singh, Rippy 1 ; Lubbers, Edward L. 1 ; Xu, Peng 2 ; Smith, C. Wayne 3 ; Paterson, A 1 ;

作者机构： 1.Univ Georgia, Mol Cotton Breeding Lab, Tifton, GA 31793 USA

2.Jiangsu Acad Agr Sci, Inst Agrobiotechnol, Nanjing 210014, Peoples R China

3.Texas A&M Univ, Dept Soil & Crop Sci, College Stn, TX 77843 USA

4.Univ Georgia, Plant Genome Mapping Lab, Athens, GA 30602 USA

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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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.

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