SapBase (Sapinaceae Genomic DataBase): a central portal for functional and comparative genomics of Sapindaceae species

Sapindaceae is a family of flowering plants, also known as the soapberry family, comprising 141 genera and about 1900 species (Pedro et al., 2010). Most of them are distributed in tropical and subtropical regions, including trees, shrubs, also woody or herbaceous vines. Some are dioecious, while others are monoecious. Many Sapindaceae species possess great economic value; some furnish delicious fruits, like lychee ( Litchi chinensis ), longan ( Dimocarpus longan ), rambutan ( Nephelium lappaceum ); and ackee ( Blighia sapida ) - the national fruit of Jamaica; some produce abundance secondary metabolites, like saponin from soapberry ( Sapindus mukorossi ), and seed oil from yellowhorn ( Xanthoceras sorbifolium ); some yield valuable timber including maple ( Acer spp .) and buckeye ( Aesculus glabra ); and some are of great herbal medicinal value, like balloon-vine ( Cardiospermum halicacabum ). In the last decade, with the rocketing of next generation sequencing (NGS) and genomic technologies, the full genome sequences of several Sapindaceae plants have been resolved (Lin et al., 2017; Liang et al., 2019; Yang et al., 2019; Zhang et al., 2021; Hu et al., 2022; Xue et al., 2022). Among them, our recent publication of the lychee genome attracted broad attention (Edger, 2022; Hu et al., 2022; Lyu, 2022). Now the post-genome era arrives for Sapindaceae, however, there is no public genomic database available for any Sapindaceae species, let alone an integrative database for the whole Sapindaceae family. A unified data platform is in urgent need to collect, manage and share relevant data resources. Therefore, we integrated our home-brew NGS data with all publicly available data for seven Sapindaceae plants and constructed the Sap inaceae Genomic Data Base , named SapBase ( www.sapindaceae.com ), in order to provide genomic resources and an online powerful analytic platform for scientific research on Sapinaceae species and comparative studies with other plants.