Genetic Mapping of Loci for Resistance to Stem Rust in a Tetraploid Wheat Collection.

ABSTRACT: Stem rust, caused by Puccinia graminis f. sp. tritici (Pgt), is a major biotic constraint to wheat production worldwide. Disease resistant cultivars are a sustainable means for the efficient control of this disease. To identify quantitative trait loci (QTLs) conferring resistance to stem rust at the seedling stage, an association mapping panel consisting of 230 tetraploid wheat accessions were evaluated for reaction to five Pgt races under greenhouse conditions. A high level of phenotypic variation was observed in the panel in response to all of the races, allowing for genome-wide association mapping of resistance QTLs in wild, landrace, and cultivated tetraploid wheats. Twenty-two resistance QTLs were identified, which were characterized by at least two marker-trait associations. Most of

SUBMITTER: Saccomanno A 

PROVIDER: S-EPMC6321032 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature