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- Title
Genome-wide associations for multiple pest resistances in a Northwestern United States elite spring wheat panel.
- Authors
Ando, Kaori; Rynearson, Sheri; Muleta, Kebede T.; Gedamu, Jhonatan; Girma, Bedada; Bosque-Pérez, Nilsa A.; Chen, Ming-Shun; Pumphrey, Mike O.
- Abstract
Northern areas of the western United States are one of the most productive wheat growing regions in the United States. Increasing productivity through breeding is hindered by several biotic stresses which slow and constrain targeted yield improvement. In order to understand genetic variation for stripe rust (Puccinia striiformis f. sp. tritici), Septoria tritici blotch (Mycosphaerella graminicola), and Hessian fly (Mayetiola destructor) in regional germplasm, a panel of 408 elite spring wheat lines was characterized and genotyped with an Illumina 9K wheat single nucleotide polymorphism (SNP) chip to enable genome-wide association study (GWAS) analyses. Significant marker-trait associations were identified for stripe rust (38 loci), Septoria tritici blotch (8) and Hessian fly (9) resistance. Many of the QTL corresponded with previously reported gene locations or QTL, but we also discovered new resistance loci for each trait. We validated one of the stripe rust resistance loci detected by GWAS in a bi-parental mapping population, which confirmed the detection of Yr15 in the panel. This study elucidated well-defined chromosome regions for multiple pest resistances in elite Northwest germplasm. Newly identified resistance loci, along with SNPs more tightly linked to previously reported genes or QTL will help future breeding and marker assisted selection efforts.
- Subjects
WHEAT disease &; pest resistance; WHEAT farming; WHEAT yields; STRIPE rust; WHEAT speckled leaf blotch; HESSIAN fly; SINGLE nucleotide polymorphisms
- Publication
PLoS ONE, 2018, Vol 13, Issue 2, p1
- ISSN
1932-6203
- Publication type
Article
- DOI
10.1371/journal.pone.0191305