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The population genetics of maize dwarf mosaic virus in Spain

M A Achon1, A Larrañaga, N Alonso-Dueñas

  • 1Departamento de Producción Vegetal y Ciencia Forestal, Universidad de Lleida, Rovira Roure 191, 25198 Lleida, Spain. achon@pvcf.udl.es

Archives of Virology
|August 3, 2012
PubMed

Insights

Maize dwarf mosaic virus (MDMV) in Spain shows high genetic diversity and is spatially structured. Analysis revealed significant nucleotide diversity and negative selection pressures on the P1-HC region.

Area of Science:

  • Plant Virology
  • Population Genetics
  • Molecular Biology

Background:

  • Maize dwarf mosaic virus (MDMV) is a significant pathogen affecting maize crops.
  • Understanding the genetic diversity and population structure of MDMV is crucial for developing effective disease management strategies.

Purpose of the Study:

  • To investigate the population genetics of MDMV in Spain.
  • To analyze the genetic diversity, structure, and evolutionary pressures on the P1-HC region of MDMV.

Main Methods:

  • Restriction fragment length polymorphism (RFLP) analysis of 363 MDMV isolates.
  • Nucleotide sequence analysis of 112 MDMV isolates.
  • Phylogenetic analysis and selection pressure analysis of the P1-HC region.

Main Results:

  • The MDMV population in Spain comprised 69 haplotypes with high nucleotide sequence diversity (0.143).
  • The P1-HC region exhibited significant nucleotide diversity, with P1 showing higher diversity than HC.
  • Evidence of recombination was found in twelve sequences, and the P1-HC region was under strong negative selection.
  • The MDMV population displayed spatial structuring but lacked temporal or host-based structuring.
  • Phylogenetic analysis delineated the MDMV sequences into five distinct major groups.

Conclusions:

  • The Spanish MDMV population is genetically diverse and spatially structured.
  • Negative selection pressure plays a significant role in shaping the P1-HC region of MDMV.
  • Further research into MDMV evolution and epidemiology is warranted.

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