Targeting sorghum improvement in drought-prone environments: Approaches and progress uri icon

abstract

  • Grain sorghum is grown in environments of highly variable water supply, both withinand between seasons. This variability, coupled with associated genotype-by-environment(GxE) interactions, results in unclear definition of both target environment(s) andtraits that may be used as selection criteria, causing slow progress in breeding fordrought resistance. This paper reviews new approaches to characterize environmentsin terms of the incidence of water deficits and to assess the value of traits for improvementof drought resistance. Sorghum simulation models are powerful tools to characterizetypes of environmental challenges and their frequency of occurrence at differentlocations. Models also are being used to assess hypotheses about trait action and theirvalue, and to develop optimal combinations of traits for different environmental challenges.Further research involving physiologists, agronomists, and plant breeders usingintegrated systems analysis will realize the potential of these approaches and improvethe efficiency of selection in drought-prone environments

publication date

  • 1996