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

Authors

• Maria Munoz-Amatriain, Colorado State University
• Javier Hernandez, Oregon State University
• Dustin Herb, Oregon State University
• P Stephen Baenziger, University of Nebraska - LincolnFollow
• Anne Marie Bochard, Limagrain Europe
• Flavio Capettini, Alberta Agriculture and Forestry
• Ana Casas, Aula Dei Experimental Station
• Alfonso Cuesta-Marcos, Bayer-Crop Science
• Claus Einfeldt, Saatzucht Ackermann GmbH &Co.
• Scott Fisk, Oregon State University
• Amelie Genty, Centre de Bois Henry
• Laura Helgerson, Oregon State University
• Markus Herz, Institute for Crop Science
• Gongshe Hu, United States Department of Agriculture-Agricultural Research Service
• Ernesto Igartua, Aula Dei Experimental Station
• Ildiko Karsai, Center for Agricultural Research
• Toshiki Nakamura, Division of Field Crops and Horticulture Research Tohoku Agricultural Research Center National Agriculture and Food Research Organization (NARO)
• Kazuhiro Sato, Okayam University
• Kevin Smith, University of Minnesota
• Eric Stockinger, The Ohio State University
• William Thomas, The James Hutton Institute
• Patrick Hayes, Oregon State University

Document Type

Article

Date of this Version

11-9-2020

Citation

Muñoz-Amatriaín M, Hernandez J, Herb D, Baenziger PS, Bochard AM, Capettini F, Casas A, Cuesta-Marcos A, Einfeldt C, Fisk S, Genty A, Helgerson L, Herz M, Hu G, Igartua E, Karsai I, Nakamura T, Sato K, Smith K, Stockinger E, Thomas W and Hayes P (2020) Perspectives on Low Temperature Tolerance and Vernalization Sensitivity in Barley: Prospects for Facultative Growth Habit. Front. Plant Sci. 11:585927. doi: 10.3389/fpls.2020.585927

Comments

OPEN ACCESS

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.