Genome-wide association study for crown rust (Puccinia coronata f. sp. avenae) and powdery mildew (Blumeria graminis f. sp. avenae) resistance in an oat (Avena sativa) collection of commercial varieties and landraces

Frontiers in Plant Science
Gracia Montilla-BascónElena Prats

Abstract

Diseases caused by crown rust (Puccinia coronata f. sp. avenae) and powdery mildew (Blumeria graminis f. sp. avenae) are among the most important constraints for the oat crop. Breeding for resistance is one of the most effective, economical, and environmentally friendly means to control these diseases. The purpose of this work was to identify elite alleles for rust and powdery mildew resistance in oat by association mapping to aid selection of resistant plants. To this aim, 177 oat accessions including white and red oat cultivars and landraces were evaluated for disease resistance and further genotyped with 31 simple sequence repeat and 15,000 Diversity Arrays Technology (DArT) markers to reveal association with disease resistance traits. After data curation, 1712 polymorphic markers were considered for association analysis. Principal component analysis and a Bayesian clustering approach were applied to infer population structure. Five different general and mixed linear models accounting for population structure and/or kinship corrections and two different statistical tests were carried out to reduce false positive. Five markers, two of them highly significant in all models tested were associated with rust resistance. No strong...Continue Reading

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Jun 20, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Giorgio TuminoMarinus J M Smulders
Aug 29, 2017·Molecular Plant Pathology·Eric S NazarenoMelania Figueroa
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Aug 4, 2021·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Simon RioElena Prats

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Methods Mentioned

BETA
genotyping
PCAs
PCA

Software Mentioned

QVALUE
STRUCTURE
PAST
BlastX
BLAST
SPSS
Diversity
R
TASSEL
BLASTN

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