Associations among Twenty Years of International Bread Wheat Yield Evaluation Environments

Understanding the way different environments differentiate cultivars for yield allows the plant breeder to optimize choice of parents, germplasm screening, yield testing, and resource use within the target region. To determine the associations among yield testing environments, wheat ( Triticum aestivum L.) yield data from 963 replicated trials sown across a 20‐yr period were analyzed by means of pattern analysis and the shifted multiplicative...