Open AccessThe genome of A frican yam ( D ioscorea cayenensis‐rotundata complex) hosts endogenous sequences from four distinct badnavirus species
Author(s) -
Umber Marie,
Filloux Denis,
Muller Emmanuelle,
Laboureau Nathalie,
Galzi Serge,
Roumagnac Philippe,
IskraCaruana MarieLine,
Pavis Claudie,
Teycheney PierreYves,
Seal Susan E.
Publication year - 2014
Publication title -
molecular plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.945
H-Index - 103
eISSN - 1364-3703
pISSN - 1464-6722
DOI - 10.1111/mpp.12137
Subject(s) - biology , genome , endogeny , phylogenetic tree , genetics , phylogenetics , gene , endocrinology
Summary Several endogenous viral elements ( EVE s) have been identified in plant genomes, including endogenous pararetroviruses ( EPRV s). Here, we report the first characterization of EPRV sequences in the genome of A frican yam of the D ioscorea cayenensis‐rotundata complex. We propose that these sequences should be termed ‘endogenous D ioscorea bacilliform viruses' ( eDBV s). Molecular characterization of eDBV s shows that they constitute sequences originating from various parts of badnavirus genomes, resulting in a mosaic structure that is typical of most EPRV s characterized to date. Using complementary molecular approaches, we show that eDBV s belong to at least four distinct B adnavirus species, indicating multiple, independent, endogenization events. Phylogenetic analyses of eDBV s support and enrich the current taxonomy of yam badnaviruses and lead to the characterization of a new B adnavirus species in yam. The impact of eDBV s on diagnosis, yam germplasm conservation and movement, and breeding is discussed.