Indian Society of Genetics & Plant Breeding

Deploying inter-specific recombinant inbred lines to map QTLs for yield-related traits in soybean

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Quantitative trait loci (QTL) mapping and analyses were
conducted for yield and six yield-related traits in soybean
using 184 inter-specific recombinant inbred lines (RILs)
derived from a cross involving wild type (
Glycine soja Sieb.
& Zucc.) accession DC2008-1 and cultivated (
Glycine max
L. Merr.) variety DS9712. A Linkage map of 1639.55 cM length
was constructed with 167 SSR markers (65.65%
polymorphism) with an average marker interval of 9.82 cM.
Using three years phenotypic data 34 QTLs were mapped
for 7 traits using Inclusive Composite Interval Mapping
approach. The number of QTLs mapped for a trait varied
from year to year, however, QTLs for days-to-50% flowering
qDFF5), 100-seed weight (qHSW9-1, qHSW9-2 and
qHSW19) and yield (qYLD17) were mapped consistently
over the three years of testing. Identified QTLs were
validated through single marker analysis in 92 germplasm
lines. The study demonstrated the potential of wild type
soybean to harness QTLs for yield-related traits. The
identified QTLs could be utilized for genetic improvement
of soybean through molecular breeding.

Keywords: QTLs, RIL, soybean, SSR markers, yieldrelated traits


Year: 2019
Volume: 79
Issue: 4
Article DOI: 10.31742/IJGPB.79.4.7
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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