Molecular characterization of a new begomovirus infecting a leguminous weed Rhynchosia minima in India

Abstract

A begomovirus associated with yellow mosaic disease in Rhynchosia minima, a common weed was cloned and sequenced. The virus has a bipartite genome, of which DNA-A is 2727 nucleotide length, and DNA-B 2679 nucleotides, and has a typical Old World bipartite begomovirus genome organization. Sequence comparison to all other begomovirus sequences available in the database shows the virus isolated from R. minima to be distinct. Maximum identity of 84% was seen with an isolate of Velvet bean severe mosaic virus-(India: Lucknow:2009) VBSMV-(IN:Luc:09) (GeneBank Accession No. FN543425), while less than 73% identity was observed with any other legumovirus. The molecular data show that the virus identified here is a new species in the genus Begomovirus for which the name Rhynchosia yellow mosaic India virus is proposed.

Molecular identification of a Begomovirus associated with yellow vein net disease on Malva parviflora L. from india.

“…The occurrence begomovirus on weed plants have been reported from India like: Ageratum enation virus (AgEV) on Cleome gynandra [20], Crassocephalum crepidioides and Ageratum conyzoides [21]. A new begomovirus Rhynchosia yellow mosaic India virus associated with yellow mosaic disease in Rhynchosia minima [22]. Jatropha gossypifolia weed plants have been reported from the natural occurrence of Croton yellow vein mosaic virus and Croton yellow vein mosaic betasatellite from India [23] and a new begomovirus Jatropha yellow mosaic India virus also have been reported from J. gossypifolia [2].…”

First report on the association of a begomovirus with chrysanthemum indicum exhibiting yellowing of leaf vein disease characterized by molecular studies

“…With regard to the Indian context, numerous reports on begomovirus infection in weeds and crops are available (Chatterjee et al 2007;Das et al 2008;Ghosh et al 2007;Jyothsna et al 2011;Khan et al 2002) but there is much less information regarding begomovirus infections in ornamental plants (Marwal et al 2013b). This is because ornamentals are sometimes neglected or are not taken into consideration while carrying out survey and begomovirus studies.…”

Begomovirus associated with alternative host weeds: a critical appraisal

“…(Jyothsna et al 2011). During 2009, vein yellowing disease was observed on the weeds Crassocephalum crepidioides and Ageratum conyzoides.…”