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tobamovirus
''Tobamovirus'' is a genus of viruses, in the family Virgaviridae. Plants, including tobacco, potato, tomato, and squash, serve as natural hosts. There are currently 35 species in this genus including the type species Tobacco mosaic virus. Diseases associated with this genus include: necrotic lesions on leaves.〔(【引用サイトリンク】url=http://viralzone.expasy.org/all_by_species/51.html )〕〔(【引用サイトリンク】title=Virus Taxonomy: 2014 Release )〕 The name ''Tobamovirus'' is an acronym, coming from the host and symptoms of the first virus discovered (Tobacco mosaic virus).
There are four informal subgroups within this genus; the brassicas, cucurbits, malvaceous and solanaceous infecting tobamoviruses. The main differences between these groups are genome sequence and range of host plants.
==Evolution==
These viruses are thought to have codiverged with their hosts from a common ancestor. There are at least 3 clades of virus: one infecting solanaceous species; a second infecting cucurbits and legumes and a third infecting the crucifers.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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