Genetic Variability and Host Adaption of Cymbidium Mosaic Virus
Cymbidium mosaic virus(CymMV)is a highly destructive plant pathogen that inflicts significant losses on orchid production.This study investigates the genetic variability and adaptive evolution of CymMV.The coat protein(CP)gene of 16 CymMV isolates from Dendrobium nobile was sequenced and analyzed alongside published CP sequences of 52 CymMV isolates from various host plants in China.Analysis reveals a substantial genetic diversity within the CP gene,with an overall nucleotide diversity of 0.039 and a haplotype diversity of 0.992.AMOVA tests demonstrate that the molecular variation among individuals accounts for 71.72％of the total variation of CymMV.Population structure analysis classifies CymMV into two distinct clusters.Cluster 1 exclusively consists of CymMV isolates from Cymbidium ensifolium,while Cluster 2 encompasses CymMV isolates from multiple host species,yet isolates from the same host species tend to form subclusters.Furthermore,a robust association between the phylogeny and host species of CymMV is revealed through phylogeny-trait association analysis.Overall,the findings of this study indicate that the genetic variation of CymMV is specific to its host species,suggesting that its evolution is primarily driven by selection pressures imposed by its hosts.
Cymbidium mosaic viruscoat protein genegenetic diversitydiscriminant analysis of principal componentsadaptive evolution
NETL
NSTL
万方数据
维普
