Abstract
Most breeding programmes have devoted a limited effort to investigation of genotype environment interactions and their possible implications, despite the apparently considerable importance of the issue, the frequently large investment by public and private institutions in multienvironment testing and the ever growing number of statistical methods proposed for this target. A substantial inversion of this trend can be expected to occur in so far as ordinary breeders are increasingly being sought as the main users of these methods, the analyses are finalized to answer practical, crucial questions concerning adaptation strategies and yield-stability targets and, most of all, the documented application of results of these analyses to breeding programmes provides increasing evidence of their contribution to the attainment of higher and more stable crop yields.