Genetic linkage map construction for fibre quality traits in intraspecific upland cotton (Gossypium hirsutum L.)

    Ravichandran, M and Debashis, R and Subramanyam, K and Govindaraj, M (2019) Genetic linkage map construction for fibre quality traits in intraspecific upland cotton (Gossypium hirsutum L.). EurAsian Journal of BioSciences, 13 (1). pp. 127-134.

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    Abstract

    The quantitative traits such as fibre length, fibre strength, fineness, uniformity, color and elongation are considered as important fibre quality traits fetches high market price for cotton, thus identification of quantitative trait loci (QTL) for fibre quality traits in cotton (G.hirsutum) would be beneficial for cotton fibre yield and quality improvement . Hence the main objective of this study was to identify QTLs for fibre quality traits using an intraspecific mapping population derived from a cross between JKC737 (G.hirsutum) and JKC725 (G.hirsutum) comprising 180 F6 – RILs. Population study was carried out for 3867 primer pairs using two parental genotypes (JKC737 & JKC725) of a mapping population developed for fibre quality related traits; only 174 SSR were polymorphic. Owing to a low level of polymorphism between the parental genotypes and a high degree of segregation distortion in recombinant inbred lines, genotypic data of only 120 polymorphic SSR on the mapping population consisting of 180 RIL could be used for construction of a linkage map; 120 SSR loci were mapped on eighteen different linkage groups that covered a total genetic distance of 2883.8cM. Hopefully this map will be enriched with more SSR loci in future and will prove useful for identification of quantitative trait loci/genes for molecular breeding involving improvement of fibre strength and other related traits in cotton.

    Item Type: Article
    Divisions: Research Program : Asia
    CRP: UNSPECIFIED
    Uncontrolled Keywords: QTLs, fibre quality traits, genetic linkage map, marker assisted selection, RIL, polymorphic primers
    Subjects: Others
    Depositing User: Mr Ramesh K
    Date Deposited: 17 Sep 2019 04:55
    Last Modified: 17 Sep 2019 04:55
    URI: http://oar.icrisat.org/id/eprint/11309
    Official URL:
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: UNSPECIFIED
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