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Related Experiment Videos

Sequence comparison and classification of beet luteovirus isolates

J R de Miranda1, M Stevens, E de Bruyne

  • 1John Innes Centre, Colney, Norwich, U.K.

Archives of Virology
|January 1, 1995
PubMed
Summary

Three distinct sequence groups of beet western yellows virus (BWYV) and beet mild yellowing virus (BMYV) were identified. These groups correlate with host specificity and geographic origin, suggesting a need for revised nomenclature.

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Area of Science:

  • Plant virology
  • Molecular biology
  • Genomics

Background:

  • Beet western yellows virus (BWYV) and beet mild yellowing virus (BMYV) are significant pathogens affecting sugar beet and oilseed rape.
  • Understanding their genetic diversity is crucial for disease management and control strategies.

Purpose of the Study:

  • To investigate the genetic diversity and sequence variability of BWYV and BMYV isolates.
  • To differentiate between BWYV and BMYV based on molecular and host range characteristics.
  • To propose a revised nomenclature based on distinct genetic groups.

Main Methods:

  • Partial nucleotide sequencing of 38 BWYV and BMYV isolates from diverse geographic locations (Europe, Iran, USA).
  • Comparative analysis of distinct genome regions, including intergenic regions, polymerase, and coat protein genes.

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  • Host range assessment (sugar beet and oilseed rape) for isolate transmission.

    • Main Results:

    • Three distinct sequence groups were identified among the analyzed isolates.
    • Group 1 isolates infect both sugar beet and oilseed rape, characterized by two single base pair changes.
    • Group 2 isolates are primarily oilseed rape-specific, with distinct intergenic regions.
    • Group 3 isolates are mostly beet-specific from Southern Europe/Iran, showing significant divergence and relatedness to other luteoviruses.

    Conclusions:

    • The identified genetic groups correlate with host specificity and geographic origin.
    • A proposal is made to use BWYV for groups 1 and 2 (BWYV-1, BWYV-2) and BMYV for the distinct group 3 isolates.
    • This revised nomenclature reflects the genetic distinctiveness and aids in understanding virus epidemiology.