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Identification of quantitative trait loci controlling soybean seed weight in recombinant inbred lines derived from PI 483463 ( Glycine soja ) × ‘Hutcheson’ ( G. max )
Author(s) -
Kulkarni Krishnanand P.,
Kim Minsu,
Shan J. Grover,
Lee JeongDong
Publication year - 2016
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12407
Subject(s) - quantitative trait locus , biology , inbred strain , family based qtl mapping , epistasis , genetics , genotype , allele , genetic linkage , gene , gene mapping , chromosome
The objective of this study was to identify quantitative trait loci (QTLs) controlling 100‐seed weight in soybean using 188 recombinant inbred lines ( RIL ) derived from a cross of PI 483463 and ‘Hutcheson’. The parents and RIL s were grown for 4 years (2010–2013), and mature, dry seeds were used for 100‐seed weight measurement. The variance components of genotype ( a ), environment ( e ) and a × e interactions for seed weight were highly significant. The QTL analysis identified 14 QTL s explaining 3.83–12.23% of the total phenotypic variation. One of the QTL s, qSW 17‐2, was found to be the stable QTL , being identified in all the environments with high phenotypic variation as compared to the other QTL s. Of the 14 QTL s, 10 QTL s showed colocalization with the seed weight QTL s identified in earlier reports, and four QTL s, qSW 5‐1, qSW 14‐1, qSW 15‐1 and qSW 15‐2, found to be the novel QTL s. A two‐dimensional genome scan revealed 11 pairs of epistatic QTL s across 11 chromosomes. The QTL s identified in this study may be useful in genetic improvement of soybean seed weight.