Rice Gene Index: A Comprehensive Pan-Genome Database for Comparative and Functional Genomics of Asian Rice

Dear Editor, Asian rice(Oryza sativa)is the staple food for half the world and is a model crop that has been extensively studied.It contributes～20％of calories to the human diet(Stein et al.,2018).With the increase in global population and rapid changes in climate,rice breeders need to develop new and sustainable cultivars with higher yields,healthier grains,and reduced environmental footprints(Wing et al.,2018).