Evaluation of methods for quantification of drought tolerance in wheat

Quantification of the drought tolerance of wheat (Triticum spp.) genotypes is of interest to physiologists investigating traits associated with adaptation to dry conditions and to breeders developing cultivars for dry areas. The objective of this research was to assess drought tolerance in terms of minimal depression of yield in dry compared with favorable environments (drought susceptiblity index, S) with a superiority measure (P) based on the sum across environments of the mean-squared differences between genotype yield and the maximum yield in each environment (...)