Identification of Hop stunt viroid infecting Citrus limon in China using small RNAs deep sequencing approach

Background The advent of next generation sequencing technology has allowed for significant advances in plant virus discovery, particularly for identification of covert viruses and previously undescribed viruses. The Citrus limon Burm. f. (C. limon) is a small evergreen tree native to Asia, and . China is the world’s top lemon-producing nation.