Genetic Variation and Possible Mechanisms Driving the Evolution of Worldwide Fig mosaic virus Isolates
Yükleniyor...
Tarih
2014
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Amer Phytopathological Soc
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Fig mosaic virus (FMV) is a multipartite negative-sense RNA virus infecting fig trees worldwide. FMV is transmitted by vegetative propagation and grafting of plant materials, and by the eriophyid mite Aceria ficus. In this work, the genetic variation and evolutionary mechanisms shaping FMV populations were characterized. Nucleotide sequences from four genomic regions (each within the genomic RNAs 1, 2, 3, and 4) from FMV isolates from different countries were determined and analyzed. FMV genetic variation was low, as is seen for many other plant viruses. Phylogenetic analysis showed some geographically distant FMV isolates which clustered together, suggesting long-distance migration. The extent of migration was limited, although varied, between countries, such that FMV populations of different countries were genetically differentiated. Analysis using several recombination algorithms suggests that genomes of some FMV isolates originated by reassortment of genomic RNAs from different genetically similar isolates. Comparison between nonsynonymous and synonymous substitutions showed selection acting on some amino acids; however, most evolved neutrally. This and neutrality tests together with the limited gene flow suggest that genetic drift plays an important role in shaping FMV populations.
Açıklama
Anahtar Kelimeler
Leaf-Curl-Virus, Sense Rna Virus, Population-Genetics, Plant-Virus, Dna, Recombination, Variability, Fitness, Protein, Multipartite
Kaynak
Phytopathology
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
104
Sayı
1
