Genome-wide association mapping of resistance to eyespot disease (Pseudocercosporella herpotrichoides) in European winter wheat (Triticum aestivum L.) and fine-mapping of Pch1.

Genome-wide association mapping of resistance to eyespot disease (Pseudocercosporella herpotrichoides) in European winter wheat (Triticum aestivum L.) and fine-mapping of Pch1. Theor Appl Genet. 2016 Nov 19; Authors: Zanke CD, Rodemann B, Ling J, Muqaddasi QH, Plieske J, Polley A, Kollers S, Ebmeyer E, Korzun V, Argillier O, Stiewe G, Zschäckel T, Ganal MW, Röder MS Abstract KEY MESSAGE: Genotypes with recombination events in the Triticum ventricosum introgression on chromosome 7D allowed to fine-map resistance gene Pch1, the main source of eyespot resistance in European winter wheat cultivars. Eyespot (also called Strawbreaker) is a common and serious fungal disease of winter wheat caused by the necrotrophic fungi Oculimacula yallundae and Oculimacula acuformis (former name Pseudocercosporella herpotrichoides). A genome-wide association study (GWAS) for eyespot was performed with 732 microsatellite markers (SSR) and 7761 mapped SNP markers derived from the 90 K iSELECT wheat array using a panel of 168 European winter wheat varieties as well as three spring wheat varieties and phenotypic evaluation of eyespot in field tests in three environments. Best linear unbiased estimations (BLUEs) were calculated across all trials and ranged from 1.20 (most resistant) to 5.73 (most susceptible) with an average value of 4.24 and a heritability of H (2) = 0.91. A total of 108 SSR and 235 SNP marker-trait associations (MTAs) were identified...
Source: TAG. Theoretical and Applied Genetics - Category: Genetics & Stem Cells Authors: Tags: Theor Appl Genet Source Type: research