Genetic linkage map construction and identification of QTLs associated with agronomic traits in bambara groundnut (Vigna subterranea (L.) Verdc.) using DArTseq ‐based SNP markers

This study evaluated the effect of drought stress on yield-related and morphological traits in the F3 and F4 segregating populations of bambara groundnut derived from a controlled cross between drought tolerant genotype (S19-3, collected from Namibia) and presumed drought susceptible genotype (DodR, collected from Tanzania). The present genetic linkage map covered 1,040.92 cM (centimorgan) across 11 li nkage groups with an average interval distance of 5.23 cM among 234 DArTseq-based single nucleotide polymorphism (SNP) markers in the F2 segregating population from S19-3 × DodR. Significant and putative quantitative trait loci (QTLs) for yield-related and morphological traits under drought-stressed (DS) and well-watered (WW) conditions in the F3 and F4 segregating generations were identified. AbstractBambara groundnut [Vigna subterranea (L.) Verdc.] is an underutilised, protein-rich and self-pollinating legume that can withstand high temperature and drought stress and is mainly grown in semi-arid Africa. In order to dissect the complexity of drought resistance and to use genomic tools for yield enhancement of bambara groundnut in response to drought stress, yield-related and morphological traits under drought-stressed (DS) and well-watered (WW) conditions were evaluated in the F3 and F4 segregating generations derived from a cross between two genotypes selected from landraces S19-3 (originally from Namibia) and DodR (originally from Tanzania). Significant quantitative ...
Source: Food and Energy Security - Category: Food Science Authors: Tags: ORIGINAL ARTICLE Source Type: research