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Genotype-by-management interactions for grain yield and grain protein concentration of wheat

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Cooper, M., Woodruff, D.R., Phillips, I.G., Basford, K.E. and Gilmour, A.R. (2001) Genotype-by-management interactions for grain yield and grain protein concentration of wheat. Field Crops Research, 69 (1). pp. 47-67. ISSN 0378-4290

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Article Link: https://doi.org/10.1016/S0378-4290(00)00131-3


The magnitude of genotype-by-management (G×M) interactions for grain yield and grain protein concentration was examined in a multi-environment trial (MET) involving a diverse set of 272 advanced breeding lines from the Queensland wheat breeding program. The MET was structured as a series of management-regimes imposed at 3 sites for 2 years. The management-regimes were generated at each site–year as separate trials in which planting time, N fertiliser application rate, cropping history, and irrigation were manipulated. Irrigation was used to simulate different rainfall regimes. From the combined analysis of variance, the G×M interaction variance components were found to be the largest source of G×E interaction variation for both grain yield (; 49% of total G×E) and grain protein concentration (0.445±0.020%2; 82% of total G×E 0.546±0.057%2), and in both cases this source of variation was larger than the genotypic variance component (grain yield and grain protein 0.203±0.026%2). The genotypic correlation between the traits varied considerably with management-regime, ranging from −0.98 to −0.31, with an estimate of 0.0 for one trial. Pattern analysis identified advanced breeding lines with improved grain yield and grain protein concentration relative to the cultivars Hartog, Sunco and Meteor. It is likely that a large component of the previously documented G×E interactions for grain yield of wheat in the northern grains region are in part a result of G×M interactions. The implications of the strong influence of G×M interactions for the conduct of wheat breeding METs in the northern region are discussed.

Item Type:Article
Subjects:Science > Botany > Genetics
Plant culture > Field crops > Wheat
Live Archive:09 Jan 2024 22:26
Last Modified:09 Jan 2024 22:26

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