First report of Begonia flower breaking virus infecting Begonia bowerae in China.
Begonia spp. is one of the most economically important potted plants worldwide. In the summer of 2009, foliar symptoms of swelling or deformation were observed on ∼10% of 3000 Begonia plants (Begonia bowerae cv. Tiger) in Kunming, Yunnan, China. Total RNA was extracted from symptomatic leaf samples of six plants. Based on reverse transcription-PCR assays and BLAST analysis of the nucleotide sequences, the causal agent was identified as Begonia flower breaking virus (BFBV). This is thought to be the first report of BFBV in China, and B. bowerae is a new host of the virus.