ISSN:
1435-0653
Keywords:
AMMI, Additive Main Effect and Multiplicative Interaction Effect CHU, Corn Heat Units E, environment main effect G, genotypic main effect GE, genotype × environment interaction GGE, G plus GE GGL, G plus GL GL, genotype × location interaction L, location main effect MET, multiple environment trials OCCC, Ontario Cereal Crops Committee OWWP, Ontario winter wheat performance trials PC, principal component(s) SREG, sites regression SVD, singular value decomposition
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Triticum aestivum L.) performance trials, the GGE biplots clearly identified yearly winning genotypes and their winning niches. Collective analysis of the yearly biplots suggests two winter wheat mega-environments in Ontario: a minor mega-environment (eastern Ontario) and a major one (southern and western Ontario), the latter being traditionally divided into three subareas. There were frequent crossover GE interactions within the major mega-environment but the location groupings were variable across years. It therefore could not be further divided into meaningful subareas. It was revealed that in most years PC1 represents a proportional cultivar response across locations, which leads to noncrossover GE interactions, while PC2 represents a disproportional cultivar response across locations, which is responsible for any crossover GE interactions. Consequently, genotypes with large PC1 scores tend to give higher average yield, and locations with large PC1 scores and near-zero PC2 scores facilitates identification of such genotypes.
Type of Medium:
Electronic Resource
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