84 research outputs found
High genetic homogeneity points to a single introduction event responsible for invasion of Cotton leaf curl Multan virus and its associated betasatellite into China
Infection of Urtica incisa with chili leaf curl virus and tomato leaf curl betasatellite in Oman
Recombinant goose circoviruses circulating in domesticated and wild geese in Poland
© 2018 by the authors. Licensee MDPI, Basel, Switzerland. Circoviruses are circular single-stranded DNA (ssDNA) viruses that infect a variety of animals, both domestic and wild. Circovirus infection in birds is associated with immunosuppression and this in turn predisposes the infected animals to secondary infections that can lead to mortality. Farmed geese (Anser anser) in many parts of the world are infected with circoviruses. The majority of the current genomic information for goose circoviruses (GoCVs) (n = 40) are from birds sampled in China and Taiwan, and only two genome sequences are available from Europe (Germany and Poland). In this study, we sampled 23 wild and 19 domestic geese from the Gopło Lake area in Poland. We determined the genomes of GoCV from 21 geese; 14 domestic Greylag geese (Anser anser), three wild Greylag geese (A. anser), three bean geese (A. fabalis), and one white fronted goose (A. albifrons). These genomes share 83–95% nucleotide pairwise identities with previously identified GoCV genomes, most are recombinants with exchanged fragment sizes up to 50% of the genome. Higher diversity levels can be seen within the genomes from domestic geese compared with those from wild geese. In the GoCV capsid protein (cp) and replication associated protein (rep) gene sequences we found that episodic positive selection appears to largely mirror those of beak and feather disease virus and pigeon circovirus. Analysis of the secondary structure of the ssDNA genome revealed a conserved stem-loop structure with the G-C rich stem having a high degree of negative selection on these nucleotides
Tomato leaf curl Kunene virus: a novel tomato-infecting monopartite begomovirus from Namibia
Complete genome sequence of a novel fish papillomavirus detected in farmed wels catfish (Silurus glanis)
Comparative analysis of common regions found in babuviruses and alphasatellite molecules
New strains of chickpea chlorotic dwarf virus discovered on diseased papaya and tomato plants in Burkina Faso
Tomato leaf curl Mahé virus: a novel tomato-infecting monopartite begomovirus from the Seychelles
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