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GrainGenes Reference Report: TAG-109-1632

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Reference	TAG-109-1632
Title	Environment characterisation for the interpretation of environmental effect and genotype x environment interaction
Journal	Theoretical and Applied Genetics
Year	2004
Volume	109
Pages	1632-1640
Author	Lacaze X Roumet P
Abstract	Increasing attention is being paid to environment characterisation as a means of identifying the environmental factors determining grain protein content (GPC) in durum wheat. New insights in crop physiology and agronomy have led to the development of crop simulation models. Those models can reconstruct plant development for past cropping seasons. One major advantage of these models is that they can also indicate the intensity of limiting factors affecting plants during particular developmental stages. The main environmental factors determining GPC in durum wheat can be investigated by introducing the intensity of limiting factors into genotype x environment (G x E) models. In our case, limiting factors corresponding to water deficit and nitrogen availability were calculated for the development period between booting and heading. These variables were then introduced into a clustering model. This model is an extension of factorial regression applied to discrete environment and genotypic variables. This procedure effectively described the environment main effect: around 30.9% of the sum of squares of the environment main effect was accounted for, using less than 33% of the degrees of freedom. It also partially accounted for G x E interaction. Our methodology, coupling the use of crop simulation and G x E analysis models, is of potential value for improving our understanding of the main development stages and identification of environmental limiting factors for the development of GPC
External Databases	Pubmed: 15372155
Keyword	[ Hide all but 1 of 32 ] agronomy chemical composition crop growth stage development developmental stages environment environmental factors extension genome genotype genotype environment interaction grain grain protein growth period heading identification limiting factors methodology models nitrogen nutrient availability physiology plant composition plant development plants protein protein content seasons simulation models water deficit water stress wheat

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