Genetic Diversity of Potato Leafroll Virus (Polerovirus <i>PLRV</i>) Is Shaped by Variant Displacements and Selective Pressures Imposed by Aphid and Tuber Transmission Routes.

ABSTRACT: Potato leafroll virus (PLRV, species Polerovirus PLRV) is a major pathogen affecting potatoes worldwide. Since 2018, PLRV incidence has increased in Scottish potato crops. Deep sequencing of PLRV in Scottish potato plants revealed the prevalence of a novel PLRV type which became predominant in 2023, displacing the phylogenetically distinct variants that have been present in the region since at least 1989. Analysis of the infection dynamics of the cDNA clone-derived PLRV isolates in potato plants indicated that the novel PLRV may accumulate to higher levels compared to the historic one. Analysis of the genetic diversity of PLRV in early and late field generations (FGs) of seed potatoes showed a significantly reduced genetic diversity of the PLRV structural genes in the early FGs comp

SUBMITTER: Cowan GH 

PROVIDER: S-EPMC12568242 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature