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Genetic structure and molecular variability of potato virus M populations

Fatemeh Tabasinejad, Behrooz Jafarpour, Mohammad Zakiaghl

    Archives of Virology
    |March 25, 2014
    PubMed

    Insights

    Genetic diversity in potato virus M (PVM) reveals two distinct evolutionary lineages and 16 genotype groups. Analysis indicates strong purifying selection on the coat protein gene, crucial for understanding PVM evolution and management.

    Area of Science:

    • Plant Virology
    • Molecular Evolution
    • Genetics

    Background:

    • Potato virus M (PVM) is a significant pathogen affecting potato crops globally.
    • Understanding PVM genetic diversity is crucial for developing effective disease management strategies.

    Purpose of the Study:

    • To investigate the genetic diversity of PVM isolates from Iran.
    • To determine the evolutionary lineages and genetic variability of the PVM coat protein (CP) gene.

    Main Methods:

    • Sequencing of the complete coat protein gene from 30 Iranian PVM isolates.
    • Phylogenetic analysis incorporating GenBank data.
    • Analysis of synonymous-to-nonsynonymous ratios to assess selection pressures.

    Main Results:

    • Identified two divergent evolutionary lineages (PVM-o and PVM-d) irrespective of isolate origin.
    • Revealed 16 distinct genotype groups within the PVM population.
    • Demonstrated strong purifying selection acting on the CP gene across different genotype groups and clades.

    Conclusions:

    • The PVM population exhibits significant genetic diversity with distinct evolutionary pathways.
    • Purifying selection plays a key role in maintaining the integrity of the PVM CP gene.
    • Findings provide insights into PVM evolution and inform strategies for disease control.

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