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Title: Genome-wide association mapping of fusarium head blight resistance in spring wheat lines developed in Pacific Northwest and CIMMYT

Author
item WANG, RUI - University Of Idaho
item CHEN, JINALI - University Of Idaho
item ANDERSON, JAMES - University Of Minnesota
item ZHANG, JUNLI - University Of Minnesota
item ZHAO, WEIDONG - University Of Idaho
item WHEELER, JUSTIN - University Of Idaho
item KLASSEN, NATALIE - University Of Idaho
item See, Deven
item DONG, YANHONG - University Of Minnesota

Submitted to: Phytopathology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/11/2017
Publication Date: 10/16/2017
Citation: Wang, R., Chen, J., Anderson, J.A., Zhang, J., Zhao, W., Wheeler, J., Klassen, N., See, D.R., Dong, Y. 2017. Genome-wide association mapping of fusarium head blight resistance in spring wheat lines developed in Pacific Northwest and CIMMYT. Phytopathology. 107(12):1486-1495. https://doi.org/10.1094/PHYTO-02-17-0073-R.
DOI: https://doi.org/10.1094/PHYTO-02-17-0073-R

Interpretive Summary: Fusarium head blight is a destructive diseases of wheat in humid and semi-humid areas of the world. It has emerged in the Pacific Northwest (PNW) in recent years because of changing rotation practice. The objectives of the present study were to characterize and identify QTL associated with FHB resistance in spring wheat lines developed in PNW and International Maize and Wheat Improvement Center (CIMMYT). A total of 170 spring wheat lines were evaluated at Aberdeen, ID as well as Saint Paul and Crookston, Minnesota in 2015 and 2016. Based on two years’ data in greenhouse and field, 14 lines showing consistent resistance in multiple environments were identified. These lines are important resistance sources to develop FHB resistant cultivars for the PNW area. The 170 lines were genotyped using high-density Illumina 90K single nucleotide polymorphisms (SNPs) assay and ten other non-SNP markers. A genome-wide association analysis was conducted. Consistent significant SNP associations with multiple traits were found on chromosomes 2B, 4B, 5A, 5B, and 6A. The identified QTL are being validated in additional mapping studies and will be pyramided to local breeding lines to achieve higher level of FHB resistance in wheat.

Technical Abstract: Fusarium head blight is one of the destructive diseases of wheat in humid and semi-humid areas of the world. It has emerged in the Pacific Northwest (PNW) in recent years because of changing climate and rotation practice. The objectives of the present study were to characterize and identify QTL associated with FHB resistance in spring wheat lines developed in PNW and International Maize and Wheat Improvement Center (CIMMYT). A total of 170 spring wheat lines were evaluated at Aberdeen, ID as well as Saint Paul and Crookston, Minnesota in 2015 and 2016. Based on two years’ data in greenhouse and field, 14 lines showing consistent resistance in multiple environments were identified. These lines are important resistance sources to develop FHB resistant cultivars for the PNW area. The 170 lines were genotyped using high-density Illumina 90K single nucleotide polymorphisms (SNPs) assay and ten other non-SNP markers. A genome-wide association analysis was conducted with mixed model (Q+K). Consistent significant SNP associations with multiple traits were found on chromosomes 2B, 4B, 5A, 5B, and 6A. The identified QTL are being validated in additional mapping studies and will be pyramided to local breeding lines to achieve higher level of FHB resistance in wheat.