Full-genome analyses of a Potato Virus Y (PVY) isolate infecting pepper (Capsicum annuum L.) in the Republic of South Africa

Virus Genes. 2014 Dec;49(3):466-76. doi: 10.1007/s11262-014-1121-5. Epub 2014 Oct 11.

Abstract

Potato Virus Y (PVY) is a pathogen of economic importance in pepper and other major crop species in the family Solanaceae. Three major PVY strain groups: O, C, and N, have been distinguished on the basis of genome sequencing. In this study, the first full-genome sequence of a PVY isolate (JVW-186) infecting pepper from the province of KwaZulu-Natal, Republic of South Africa is reported. The complete genome sequence of JVW-186 was assembled from overlapping RT-PCR clones using MEGA 5 software. Two ORFs were identified at position 186 and 2915 of the sequence encoding the viral polyprotein and the frameshift translated protein P3N-PIPO, respectively. RDP4 software confirmed three recombination breakpoints at position 343, 1365, and 9308 of the sequence. At each recombination event, a 1,021-bp fragment at the 5' end in the region of the P1/HC-Pro protein and a 392-bp fragment in the region of the coat protein shared a high sequence similarity of 91.8 and 98.89 % to the potato borne PVY(C) isolate PRI-509 and the PVY(O) isolate SASA-110, respectively. The non-recombinant fragment 1 (342-bp) clustered within the C clade of PVY isolates; however, the large 7,942-bp fragment 3 did not cluster within any of the clades. This suggests the possibility of a PVY isolate that has evolved due to the dynamics of selection pressure or the likelihood of an ancestral PVY strain.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Capsicum / virology*
  • Cluster Analysis
  • Genome, Viral*
  • Molecular Sequence Data
  • Open Reading Frames
  • Phylogeny
  • Polyproteins / genetics
  • Potyvirus / classification
  • Potyvirus / genetics*
  • Potyvirus / isolation & purification
  • RNA, Viral / genetics*
  • Recombination, Genetic
  • Sequence Analysis, DNA*
  • Sequence Homology, Amino Acid
  • South Africa
  • Viral Proteins / genetics

Substances

  • Polyproteins
  • RNA, Viral
  • Viral Proteins

Associated data

  • GENBANK/KF770835