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Comparative histopathology of virulent and avirulent <i>Meloidogyne javanica</i> populations on susceptible and resistant tomato plants.

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<i>Oryza glumaepatula</i>, a New Source of Resistance to <i>Meloidogyne graminicola</i> and Histological Characterization of Its Defense Mechanisms.

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Molecular Characterization of Meloidogyne hispanica (Nematoda, Meloidogynidae) by Phylogenetic Analysis of Genes Within the rDNA in Meloidogyne spp.

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Development of Diagnostic SCAR Markers for Meloidogyne graminicola, M. oryzae, and M. salasi Associated with Irrigated Rice Fields in Americas.

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High and Low Throughput Screens with Root-knot Nematodes Meloidogyne spp.
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Molecular Techniques for Root-Knot Nematode Identification.

Regina M D G Carneiro1, Caio F B Souza2, Vanessa S Mattos2,3

  • 1Embrapa Recursos Genéticos e Biotecnologia, PqEB Parque de Estação Biológica, Brasília, DF, Brazil. regina.carneiro@embrapa.br.

Methods in Molecular Biology (Clifton, N.J.)
|March 1, 2024
PubMed
Summary

Accurate detection of root-knot nematodes (Meloidogyne spp.) is crucial for crop protection. A combined enzymatic and molecular method offers rapid and reliable diagnosis for routine analysis.

Keywords:
DiagnosisEsterase phenotypesMultiplex PCRPCRRKN molecular identificationSCAR markers

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Area of Science:

  • Agricultural Science
  • Nematology
  • Plant Pathology

Background:

  • Root-knot nematodes (Meloidogyne spp.) are major plant parasites causing significant global crop losses.
  • Effective control strategies rely on accurate and timely detection of these nematodes in plant roots and soil.
  • Traditional morphological and phylogenetic analyses are time-consuming and unsuitable for routine diagnostics.

Purpose of the Study:

  • To describe a rapid and accurate diagnostic method for Meloidogyne spp. populations.
  • To present a combined enzymatic and molecular technique for routine nematode analysis.
  • To highlight a method successfully employed for over 25 years in Brazil.

Main Methods:

  • Enzyme profiling, specifically isozyme esterase analysis.
  • Molecular marker techniques.
  • Integration of biochemical and molecular approaches for diagnosis.

Main Results:

  • The described method enables rapid and correct diagnosis of Meloidogyne spp.
  • This combined technique has been validated for over 25 years of routine use.
  • It provides an efficient alternative to time-consuming morphological analyses.

Conclusions:

  • A combined isozyme esterase profiling and molecular marker method is highly effective for routine identification of Meloidogyne spp.
  • This integrated approach facilitates timely and accurate diagnosis, supporting efficient nematode management.
  • The method's long-standing success in Brazil demonstrates its reliability and practicality.