Precision Phenotyping Reveals Novel Loci for Quantitative Resistance to Septoria Tritici Blotch.

ABSTRACT: Accurate, high-throughput phenotyping for quantitative traits is a limiting factor for progress in plant breeding. We developed an automated image analysis to measure quantitative resistance to septoria tritici blotch (STB), a globally important wheat disease, enabling identification of small chromosome intervals containing plausible candidate genes for STB resistance. 335 winter wheat cultivars were included in a replicated field experiment that experienced natural epidemic development by a highly diverse but fungicide-resistant pathogen population. More than 5.4 million automatically generated phenotypes were associated with 13,648 SNP markers to perform the GWAS. We identified 26 chromosome intervals explaining 1.9-10.6% of the variance associated with four independent resistance traits

SUBMITTER: Yates S 

PROVIDER: S-EPMC7706307 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature