Perspectives on Low Temperature Tolerance and Vernalization Sensitivity in Barley: Prospects for Facultative Growth Habit

María Muñoz-Amatriaín, Javier Hernandez, Dustin Herb, P. Stephen Baenziger, Anne Marie Bochard, Flavio Capettini, Ana Casas, Alfonso Cuesta-Marcos, Claus Einfeldt, Scott Fisk, Amelie Genty, Laura Helgerson, Markus Herz, Gongshe Hu, Ernesto Igartua, Ildiko Karsai, Toshiki Nakamura, Kazuhiro Sato, Kevin Smith, Eric StockingerWilliam Thomas, Patrick Hayes

Research output: Contribution to journalArticlepeer-review

Abstract

One option to achieving greater resiliency for barley production in the face of climate change is to explore the potential of winter and facultative growth habits: for both types, low temperature tolerance (LTT) and vernalization sensitivity are key traits. Sensitivity to short-day photoperiod is a desirable attribute for facultative types. In order to broaden our understanding of the genetics of these phenotypes, we mapped quantitative trait loci (QTLs) and identified candidate genes using a genome-wide association studies (GWAS) panel composed of 882 barley accessions that was genotyped with the Illumina 9K single-nucleotide polymorphism (SNP) chip. Fifteen loci including 5 known and 10 novel QTL/genes were identified for LTT—assessed as winter survival in 10 field tests and mapped using a GWAS meta-analysis. FR-H1, FR-H2, and FR-H3 were major drivers of LTT, and candidate genes were identified for FR-H3. The principal determinants of vernalization sensitivity were VRN-H1, VRN-H2, and PPD-H1. VRN-H2 deletions conferred insensitive or intermediate sensitivity to vernalization. A subset of accessions with maximum LTT were identified as a resource for allele mining and further characterization. Facultative types comprised a small portion of the GWAS panel but may be useful for developing germplasm with this growth habit.

Original languageEnglish (US)
Article number585927
JournalFrontiers in Plant Science
Volume11
DOIs
StatePublished - Nov 9 2020

Bibliographical note

Funding Information:
Support was provided by the USDA-NIFA TCAP Project no. 2011-68002-30029.

Publisher Copyright:
© Copyright © 2020 Muñoz-Amatriaín, Hernandez, Herb, Baenziger, Bochard, Capettini, Casas, Cuesta-Marcos, Einfeldt, Fisk, Genty, Helgerson, Herz, Hu, Igartua, Karsai, Nakamura, Sato, Smith, Stockinger, Thomas and Hayes.

Keywords

  • GWAS
  • barley
  • facultative
  • low temperature tolerance
  • meta-analysis
  • multi-environments

PubMed: MeSH publication types

  • Journal Article

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