GWAS for Fusarium Head Blight Related Traits in Winter Wheat (Triticum Aestivum L.) in an Artificially Warmed Treatment

Elisane W. Tessmann, David A. Van Sanford

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Global temperature increases will affect Fusarium head blight (FHB) levels in wheat (Triticum aestivum L.). A pressing question is whether current sources of resistance will be effective in a warmer environment. We evaluated phenotypic response to disease in 238 soft winter wheat breeding lines and cultivars grown in 2015–2016 and 2016–2017 under control and warmed (+3 C) conditions. Warming was achieved with heating cables buried 3 cm in the rhizosphere. We measured heading date, plant height, yield, FHB rating, Fusarium damaged kernels (FDK), deoxynivalenol (DON), leaf blotch rating, powdery mildew rating and leaf rust rating. There were significant (p < 0.01) differences among genotypes for all traits measured. Genome-wide association study (GWAS) identified 19 and 10 significant SNPs in the control and warmed treatments, respectively. FDK and DON levels were often significantly (p < 0.05) higher in warmed than in control when we contrasted alleles at important quantitative trait locus (QTL) such as Fhb1, Rht-B1 and D1 and all vernalization and photoperiod loci. Increased rhizosphere temperature resulted in a significantly (p < 0.01) earlier heading date (~3.5 days) both years of the study. Rank correlation between warmed and control treatments was moderate (r = 0.56). Though encouraging, it indicates that selection for performance under warming should be carried out in a warmed environment.

Original languageEnglish
Article number68
JournalAgronomy
Volume8
Issue number5
DOIs
StatePublished - 2018

Bibliographical note

Funding Information:
This work was funded by grants from USDA Triticeae Coordinate Agricultural Project, N 59-0206-4-002 and the U.S. Department of Agriculture, through the US Wheat and Barley Scab Initiative under Agreement No. 59-0206-9-054. We thank Kathleen Russell, John Connelley and Sandy Swanson for technical assistance.

Funding Information:
Acknowledgments: This work was funded by grants from USDA Triticeae Coordinate Agricultural Project, N 59-0206-4-002 and the U.S. Department of Agriculture, through the US Wheat and Barley Scab Initiative under Agreement No. 59-0206-9-054. We thank Kathleen Russell, John Connelley and Sandy Swanson for technical assistance.

Publisher Copyright:
2018 by the authors.

Keywords

  • Artificially warmed treatment
  • Deoxynivalenol
  • Fusarium damaged kernels
  • Fusarium head blight
  • GWAS
  • QTL
  • Soft red winter wheat

ASJC Scopus subject areas

  • Agronomy and Crop Science

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