Genotypexenvironment interactions and some considerations of their implications for wheat breeding in Australia

Basford, K. E. and Cooper, M. (1998) Genotypexenvironment interactions and some considerations of their implications for wheat breeding in Australia. Australian Journal of Agricultural Research, 49 2: 153-174. doi:10.1071/A97035


Author Basford, K. E.
Cooper, M.
Title Genotypexenvironment interactions and some considerations of their implications for wheat breeding in Australia
Journal name Australian Journal of Agricultural Research   Check publisher's open access policy
ISSN 0004-9409
Publication date 1998
Year available 1998
Sub-type Article (original research)
DOI 10.1071/A97035
Volume 49
Issue 2
Start page 153
End page 174
Total pages 22
Place of publication Collingwood, Victoria, Austalia
Publisher C S I R O Publishing
Language eng
Subject 070305 Crop and Pasture Improvement (Selection and Breeding)
Abstract Genotype£environment (G£E) interactions complicate selection for broad adaptation, while their nature and causes need to be understood to utilise and exploit them in selection for specific adaptation. This invited review combines an assessment of the literature with the experience we have gained from involvement in wheat breeding and associated research programs to assess (1) the implications of G£E interactions for wheat breeding in Australia, (2) the impact that research into GXE interactions has had on breeding strategy, and (3) the evidence for impact from this research effort on genetic improvement of crop adaptation. The role of analytical methodology in this process is considered and some important issues are discussed. There are su±cient examples drawn from wheat breeding in Australia to suggest that progress in dealing with G£E interactions can be made and several of these are presented. They show that impact in plant breeding follows from achieving an appropriate level of understanding of the environmental and genetic factors causing the interactions as well as an assessment of their importance in the target genotype{environment system. An accurate definition of the environmental factor(s) contributing to the GXE interactions has been particularly important in determining the relevance of observed differences in plant adaptation to the target population of environments. From the combination of biological and statistical studies, a more comprehensive understanding of G£E interactions has emerged and contributed to new concepts and procedures for dealing with them. Distinguishing between what are repeatable and non-repeatable interactions is a key step. Genuine cases of positive specific adaptation observed in multi-environment trials (METs) can be exploited by appropriately targeted selection strategies, while non-repeatable interactions are accommodated by selection for broad adaptation. The investigation of GXE interactions for grain yield of wheat in Australia has matured to the point where an understanding of some of their causes has enabled wheat breeders to exploit positive components of specific adaptation. The experience that has been gained in achieving these advances indicates the importance of establishing a MET system that is relevant to the target population of environments of the breeding program. The investment of adequate resources into effective design, conduct, analysis, and interpretation of METs remains critical to continued progress from selection in complex genotype{environment systems that present large GXE interactions. Wheat breeders who understand their genetic material and the target population of environments can then use the generated information base to achieve impact from their breeding programs.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Agriculture and Food Sciences
 
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Created: Fri, 02 Jul 2010, 16:07:35 EST by Ms Susana Macanawai on behalf of Faculty Of Nat Resources, Agric & Veterinary Sc