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Type: Journal article
Title: Quantifying wheat sensitivities to environmental constraints to dissect genotype x environment interactions in the field
Author: Parent, B.
Bonneau, J.
Maphosa, L.
Kovalchuk, O.
Langridge, P.
Fleury, D.L.
Citation: Plant Physiology, 2017; 174(3):1669-1682
Publisher: American Society of Plant Biologists
Issue Date: 2017
ISSN: 0032-0889
Statement of
Boris Parent, Julien Bonneau, Lance Maphosa, Alex Kovalchuk, Peter Langridge, and Delphine Fleury
Abstract: Yield is subject to strong genotype-by-environment (G x E) interactions in the field, especially under abiotic constraints such as soil water deficit (drought [D]) and high temperature (heat [H]). Since environmental conditions show strong fluctuations during the whole crop cycle, geneticists usually do not consider environmental measures as quantitative variables but rather as factors in multienvironment analyses. Based on 11 experiments in a field platform with contrasting temperature and soil water deficit, we determined the periods of sensitivity to drought and heat constraints in wheat (Triticum aestivum) and determined the average sensitivities for major yield components. G x E interactions were separated into their underlying components, constitutive genotypic effect (G), G x D, G x H, and G x H x D, and were analyzed for two genotypes, highlighting contrasting responses to heat and drought constraints. We then tested the constitutive and responsive behaviors of two strong quantitative trait loci (QTLs) associated previously with yield components. This analysis confirmed the constitutive effect of the chromosome 1B QTL and explained the G x E interaction of the chromosome 3B QTL by a benefit of one allele when temperature rises. In addition to the method itself, which can be applied to other data sets and populations, this study will support the cloning of a major yield QTL on chromosome 3B that is highly dependent on environmental conditions and for which the climatic interaction is now quantified.
Keywords: Triticum
Quantitative Trait Loci
Gene-Environment Interaction
Rights: © 2017 American Society of Plant Biologists. All Rights Reserved.
DOI: 10.1104/pp.17.00372
Grant ID: ARC
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