Development of a genome-wide 200K SNP array and its application for high-density genetic mapping and origin analysis of Camellia sinensis.

Tea is one of the most popular drinks in the world. It is a self-incompatible plant species, and self-incompatibility greatly contributes to its high genetic diversity. Cultivated tea plants mainly include Camellia sinensis var. assamica (CSA) and Camellia sinensis var. sinensis (CSS). The former is characterized by large leaves, cold sensitive phenotype, an arborous or semiarborous habit, whereas CSS has smaller leaves, cold tolerance and a shrub or semishrub growth habit.