Begomovirus: An Introduction
The genus Begomovirus belonging to the family Geminiviridae constitutes the largest group of plant-infecting DNA viruses affecting a wide range of dicotyledonous plants. The genus is one of the nine genera of the family Geminiviridae which have characteristic geminate (paired) particles (20 × 38 nm) consisting of two incomplete icosahedra (T = 1) containing a total of 110 coat protein subunits organized as 22 pentameric capsomers, encapsidating single-stranded circular DNA genome of 2.5–2.9 kb (Harrison et al. 1977; Stanley 1985). The members of the genus Begomovirus are transmitted by only one vector Bemisia tabaci and have either monopartite (DNA A) or bipartite (DNA A and DNA B) genome. The genus derives its name from the type member, bean golden mosaic virus (BGMV) that causes golden mosaic disease in bean in Central America.
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