Indian Society of Genetics & Plant Breeding

Important

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

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
QTL
2A.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

info_circle

Download PDF