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Fine-mapping a fibre strength QTL QFS-D11-1 on cotton chromosome 21 using introgressed lines

文献类型： 外文期刊

作者： Su, Chengfu 1 ; Wang, Wei 2 ; Qiu, Xinmian 3 ; Yang, Liu 1 ; Li, Song 1 ; Wang, Meixing 3 ; Pan, Qunbin 2 ;

作者机构： 1.Liupanshui Normal Coll, Dept Life Sci, Liupanshui 553004, Guizhou, Peoples R China

2.Agr Sci Inst Coastal Reg Jiangsu, Yancheng 224002, Jiangsu, Peoples R China

3.Zhejiang Acad Agr Sci, Inst Crop & Nucl Technol Utilizat, Hangzhou 310021, Zhejiang, Peoples R China

关键词： cotton (Gossypium hirsutum);fine-mapping;fibre strength;introgressed lines

期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）

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收录情况： SCI

摘要： An initial F-2 mapping population of 223 plants of the cross between TM-1 (Gossypium hirsutum L.)xH102 (Gossypium barbadense L.) was used to map QTLs controlling fibre strength in cotton. A genetic linkage map with 408 SSR markers was constructed with a total length of 3872.6cM. Multiple-QTL model of the software MapQTL version 5.0 was used to map QTLs related to fibre strength of the F-2:3 population. QTL QFS-D11-1 conferring fibre strength was mapped between NAU2950 and NAU4855 on chromosome 21 (Chr. 21) which explained 23.4% of phenotypic variation. Introgressed lines (ILs), that is, IL-D11-1, IL-D11-2 and IL-D11-3 were obtained through marker-assisted backcrossing in TM-1 background. An F-2 population of 758 plants derived from cross IL-D11-2xTM-1 was used for fine-mapping QTL QFS-D11-1. QFS-D11-1 was mapped between markers NAU2110 and NAU2950, adjacent to its initial interval NAU2950-NAU4855 with phenotypic variation explaining 35.8%. QFS-D11-1 was further mapped to 0.6cM from the flanking marker NAU2950. The results will give a basis for marker-assisted selection of QFS-D11-1 in cotton breeding and to lay the foundation for cloning QFS-D11-1.

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