QTL mapping of drought tolerance at germination stage in wheat using the 50 K SNP array

Abstract Drought is a major concern among abiotic stresses in wheat ( Triticum aestivum L.) production. Breeding resistant cultivars are the most effective means to manage drought stress. F 6 recombinant inbred lines (RIL) derived from cross of Berkut/Worrakatta were used identify quantitative trait loci (QTL) for tolerance at germination stage under treatment PEG6000 using 50 K single nucleotide polymorphism (SNP) array. Twenty-eight linkage groups constructed, covering length 2220.26 cM. Eighteen QTL detected based on coefficients and D-value, explaining 2.7–6.5% phenotypic variances, which 15 likely be novel. Three QTL, QGR.xjau-5AS , QCL.xjau-5AS QD.xjau-5AS GR, CL respectively, physical positions 11.70–20.61 Mb between markers AX-111258240 AX-94458300 chromosome 5AS accounted 3.4–4.8% variances. QGP.xjau-5DL QSH.xjau-5DL QD.xjau-5DL GP, SH flanked by AX-94524442 AX-110998507 560.42–567.39 5DL, accounting 4.4–6.5% In addition, candidate genes TraesCS5A02G022100 TraesCS5B02G014200 TraesCS5D02G563900 predicted. Based transcriptional expression data, results showed that level TaGATAs-5A TaUbox-5B TaGSTP-5D changed with increase time stress tolerant sensitive varieties. These interesting targets mining improvement wheat.