Section 1: An Overview of Crop Improvement 1: Plant Adaptation, Biodiversity, and Crop Improvement Strategies - Introductory Remarks 2: Understanding Plant Adaptation to Achieve Systematic Applied Crop Improvement - A Fundamental Challenge 3: Research Approaches for Variable Rainfed Systems - Thinking Globally, Acting Locally Section 2: Analysis of Genotype by Environment Interactions 4: Analysis of Multi-environment Trials - An Historical Perspective 5: Experimental Design and Analysis for Variety Trails 6: International Network for Genetic Evaluation of Rice (INGER) and its Modus Operandi for Multi-environment Testing 7: International Multi-environment Trials at the International Crop Research Institute for the Semi-Arid Tropics (ICRISAT) 8: The CIMMYT Wheat Program's International Multi-environment Trials 9: Analysis and Interpretation of Data from the Crop Variety Testing Program in Western Australia 10: Relationships Among Analytical Methods Used to Analyse Genotypic Adaptation in Multi-environment Trials 11: Methods of Data Standardisation Used in Pattern Analysis and ANMI Models for the Analysis of International Multi-environment Variety Trials 12: Retrospective Analysis of Historical Data Sets from Multi-environment Trials - Theoretical Development 13: Retrospective Analysis of Historical Data Sets from Multi-environment Trials - Case Studies 14: Three-mode Analytical Methods for Crop Improvement Programs 15: Selection for Grain Quality Traits in Early Generation Barley Breeding Trials using Residual Maximum Likelihood (REML) 16: The International Crop Information System (ICIS) - Connects Genebank to Breeder to Farmer's Field Section 3: Interpretation of Genotype by Environment Interactions 17: The Physiological Basis of Genotype by Environment Interaction in Crop Adaptation 18: Characterising Environmental Challenges Using Models 19: A Physiological Approach to the Understanding of Genotype by Environment Interactions - A Case Study on Improvement of Drought Adaptation in Groundnut 20: Integrating Genotype by Environment Interaction Analysis, Characterisation of Drought Patterns, and Farmer Preferences to Identify Adaptive Plant Traits for Pearl Millet 21: Using Simulation Models to Design New Plant Types and to Analyse Genotype by Environment Interactions in Rice 22: Integrating Physiological Understanding and Plant Breeding via Crop Modelling and Optimization 23: Comparing Simulation of Experimental Approaches to Analysing Genotype by Environment Interactions for Yield in Rainfed Lowland Rice Section 4: Integrated Approaches to Plant Improvement 24: Positive Interaction of Genotype by Environment Interactions in Relation to Sustainability and Biodiversity 25: A Strategy for Yield Improvement of Wheat which Accommodates Large Genotype by Environment Interactions 26: Pattern Analysis of Gains from Selection for Drought Tolerance in Tropical Maize Populations 27: Environmental Characterisation Based on Probe and Reference Genotypes 28: The Importance of Environmental Characterisation for Understanding Genotype by Environment Interactions 29: Using Simulation Models and Spatial Databases to Improve the Efficiency of Plant Breeding Programs Section 5: Synthesis of Strategies for Crop Improvement 30: Synthesis of Strategies for Crop Improvement