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Database: Genus Vigna

Genus Vigna consists of legume crops such as cowpea, mungbean, and azuki bean in addition to over 100 wild species. One of the most attractive features of the genus Vigna is the great adaptability of the wild species to severe environmental conditions including high salinity (-400mM NaCl), acid (-pH3) or alkaline (-pH10) soil, and drought (deprived of water for 1 month). By figuring out the mechanisms of how they adapt to such environments, it would be possible to generate novel crops tolerant to the stress conditions. Most Vigna species have diploid, relatively small (550Mb) genome, and are capable of interspecific crosses. This means that comparative genetics and genomics studies can be easily performed, making Vigna species the best material to understand environmental adaptation of higher plants.

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