Genetic analysis revealed a quantitative trait loci (QTL2A.K) on short arm of chromosome 2A associated with yellow rust resistance in wheat (Triticum aestivum L.)

Published on Sep 25, 2020 02:08 AM

Yellow rust, caused by Puccinia striiformis, is one of the
most devastating diseases in wheat. A synthetic by elite
recombinant inbred line (RIL) population derived from a
cross, Botnol/Aegilops squarrosa (666)//Kachu was
evaluated for yellow rust resistance in two different
environments in Mexico. The population was subjected to
DArT-seq analysis for an in-depth genetic characterization.
A major effect rust resistance QTL (QTL2A.K) explaining up
to 45% phenotypic variance was found to be contributed
by Kachee, an elite line of International Maize and Wheat
Improvement Center (CIMMYT) Mexico. The QTL2A.K was
found to be contributed by a segment of 2NS Chromosome
of Triticum ventricosum translocated into the short arm of
bread wheat chromosome 2A (QTL2A.K). The position of
QTL2A.K was confirmed using T.ventricosum specific primer
VENTRIUP-LN2. Identified genomic regions are being
introgressed in to the popular but susceptible wheat
varieties through marker-assisted breeding for enhancing
yellow rust resistance.

Keywords: Wheat, rust, genotyping, Quantitative Trait Locus, Puccinia striiformis

Info

Year: 2020
Volume: 80
Issue: 3
Article DOI: 10.31742/IJGPB.80.3.1
Print ISSN: 0019-5200
Online ISSN: 0975-6906

Authors

Cynthia Ortiz, Prashant Vikram, S. Singh and Sukhwinder Singh

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