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Research article - Peer-reviewed, 2020

Genomic prediction and GWAS of yield, quality and disease-related traits in spring barley and winter wheat

Tsai, Hsin-Yuan; Janss, Luc L.; Andersen, Jeppe R.; Orabi, Jihad; Jensen, Jens D.; Jahoor, Ahmed; Jensen, Just


Genome-wide association study (GWAS) and genomic prediction (GP) are extensively employed to accelerate genetic gain and identify QTL in plant breeding. In this study, 1,317 spring barley and 1,325 winter wheat breeding lines from a commercial breeding program were genotyped with the Illumina 9K barley or 15K wheat SNP-chip, and phenotyped in multiple years and locations. For GWAS, in spring barley, a QTL on chr. 4H associated with powdery mildew and ramularia resistance were found. There were several SNPs on chr. 4H showing genome-wide significance with yield traits. In winter wheat, GWAS identified two SNPs on chr. 6A, and one SNP on chr. 1B, significantly associated with quality trait moisture, as well as one SNP located on chr. 5B associated with starch content in the seeds. The significant SNPs identified by multiple trait GWAS were generally the same as those found in single trait GWAS. GWAS including genotype-location information in the model identified significant SNPs in each tested location, which were not found previously when including all locations in the GWAS. For GP, in spring barley, GP using the Bayesian Power Lasso model had higher accuracy than ridge regression BLUP in powdery mildew and yield traits, whereas the prediction accuracies were similar using Bayesian Power Lasso model and rrBLUP for yield traits in winter wheat.

Published in

Scientific Reports
2020, volume: 10, number: 1, article number: 3347

Authors' information

Tsai, Hsin-Yuan
Aarhus University
Janss, Luc L.
Aarhus University
Andersen, Jeppe R.
Nord Seed
Orabi, Jihad
Nord Seed
Jensen, Jens D.
Nord Seed
Swedish University of Agricultural Sciences, Department of Plant Breeding
Nordic Seed A/S
Jensen, Just
Aarhus University

Associated SLU-program

SLU Network Plant Protection

UKÄ Subject classification

Agricultural Science

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