Part 1 An overview of crop improvement: Understanding plant adaptation to achieve systematic applied crop improvement - a fundamental challenge, M. Cooper, D.E. Byth; Research approaches for variable rainfed systems - thinking globally, acting locally, K.S. Fischer. Part 2 Analysis of genotype by environment interactions: Analysis of multi-environment trials - an historical perspective I.H. DeLacy et al; Multienvironment testing by the international network for genetic evaluation of rice (INGER), S.W. et al; Status report of the international multi-environment trials of the ICRISAT mandate crops, G. Alagarswamy et al;The CIMMYT wheat program's international multi-environment trials, P.N. Fox; Relationships among analytical methods for analysis of genotype adaptation in multi-environment trials, M. Cooper et al; A comparison between pattern analysis conducted on environment standardised data and AMMI models for the analysis of data from multi-environment trials, C.G. McLaren; Experimental design for the conduct of multi-environment trials, K.E. Basford et al; Analysis and interpretation of data from the crop variety testing program in western Australia, R.F. Gilmour et al; Retrospective analysis of historical data from multi-environment trials I: theoretical development, I.H. DeLacy et al; Retrospective analysis of historical data from multi-environment trials II: case studies, I.H. DeLacy et al; Three-mode analytical methods for the analysis of data from multi-environment trials, K.E. Basford et al; Selection for grain quality traits in early generation barley breeding trials using the method of residual maximum likelihood (REML), R.F. Gilmour et al; The international wheat information system, P.N. Fox. Part 3 Interpretation of genotype by environment interactions: Physiological basis of genotype by environment interactions, F.R. Bidinger et al; A physiological approach for the understanding of genotype by environment interactions - a case study on improvement of drought adaptation in groundnut, G.C. Wright et al; Characterising environmental challenges using models, R.C. Muchow et al; Using environmental characterisation and village surveys to identify breeding strategies for pearl millet, E.J. van Oosterom et al; Using simulation models to relate physiological traits to the performance of rice genotypes, P.K. Aggarwal et al; Integrating physiological understanding and plant breeding via crop modelling and optimisation, G.L. Hammer et al; Comparing simulation and experimental approaches to analyzing genotype by environmental interactions for yield in rainfed lowland rice, S.A. Henderson et al. (Part contents).