title: Comparisons of coat protein gene sequences show that East African isolates of Sweet potato feathery mottle virus form a genetically distinct group.
abstract: Sweet potato feathery mottle virus (SPFMV, genus Potyvirus) infects sweet potatoes (Ipomoea batatas) worldwide, but no sequence data on isolates from Africa are available. Coat protein (CP) gene sequences from eight East African isolates from Madagascar and different districts of Uganda (the second biggest sweet potato producer in the world) and two West African isolates from Nigeria and Niger were determined. They were compared by phylogenetic analysis with the previously reported sequences of ten SPFMV isolates from other continents. The East African SPFMV isolates formed a distinct cluster, whereas the other isolates were not clustered according to geographic origin. These data indicate that East African isolates of SPFMV form a genetically unique group.
authors.affiliation: Department of Plant Biology, Genetic Centre, Swedish University of Agricultural Sciences (SLU), Uppsala.
authors.forename: J F
authors.initials: JF
authors.lastname: Kreuze
authors.forename: R F
authors.initials: RF
authors.lastname: Karyeija
authors.forename: R W
authors.initials: RW
authors.lastname: Gibson
authors.forename: J P
authors.initials: JP
authors.lastname: Valkonen
mesh_terms: D000351:Africa, Eastern; D000595:Amino Acid Sequence; D002213:Capsid / Q000235:genetics*; D018076:DNA, Complementary; D005814:Genes, Viral; D008969:Molecular Sequence Data; D010802:Phylogeny; D010935:Plant Diseases / Q000821:virology; D017800:Potyvirus / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification*; D012367:RNA, Viral / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D019657:Solanaceae / Q000821:virology*
chemical_list: D018076:DNA, Complementary; D012367:RNA, Viral