摘要: The use of model or reference species has played a major role in furthering detailed understanding mechanisms and processes the plant kingdom over past 25 years. Species which have been adopted as models for dicotyledons monocotyledons include arabidopsis rice more recently brachy-podium,Such are diploids, few small chromosomes, well developed genetics, rapid life cycles, easily transformed extensive sets technical resources databases curated by international resource centres. study crop genomics today is deeply rooted earlier studies on species. Genomes share reasonable genetic synteny with key plants facilitates discovery genes association phenotypes. While some conserved across so can be revealed any species,others diverged during evolution studying only closely related species.Examples that others therefore need to understood described.