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Related Experiment Video

Updated: Jun 24, 2026

High and Low Throughput Screens with Root-knot Nematodes Meloidogyne spp.
11:46

High and Low Throughput Screens with Root-knot Nematodes Meloidogyne spp.

Published on: March 12, 2012

Races of the Barley Root-Knot Nematode, Meloidogyne naasi. II. Developmental Rates.

R E Michell, R B Malek, D P Taylor

    Journal of Nematology
    |March 26, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Newly identified Meloidogyne naasi races show varied development on crops. Race 5 exhibits a distinct, faster life cycle on sorghum and barley compared to other races.

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    Published on: October 28, 2021

    Area of Science:

    • Plant Nematology
    • Crop Science
    • Agricultural Entomology

    Background:

    • Meloidogyne naasi, a root-knot nematode, impacts cereal crops globally.
    • Understanding nematode race-specific virulence is crucial for effective crop management.
    • Previous research has not fully characterized the developmental biology of newly identified M. naasi races.

    Purpose of the Study:

    • To compare the developmental rates of five newly designated races of Meloidogyne naasi.
    • To determine host suitability and reproductive success of each race on barley, oat, and sorghum.
    • To identify potential differences in life cycle duration among the M. naasi races.

    Main Methods:

    • Controlled greenhouse experiments were conducted to assess nematode development.
    • Five distinct races of Meloidogyne naasi were inoculated onto susceptible cultivars of barley, oat, and sorghum.
    • Developmental rates and reproductive success were quantified for each race-host combination.

    Main Results:

    • Races 1-4 of Meloidogyne naasi developed and reproduced on barley and oat but were non-pathogenic on sorghum.
    • Race 5 demonstrated successful development and reproduction on sorghum, with limited success on oat.
    • Race 5 exhibited significantly faster development rates on barley and sorghum compared to Races 1-4 on barley, indicating a shorter life cycle.

    Conclusions:

    • Meloidogyne naasi populations exhibit significant intraspecific variation in host range and developmental rates.
    • Race 5 represents a distinct pathotype with a potentially shorter life cycle, posing a unique threat to sorghum and barley.
    • These findings necessitate tailored crop resistance strategies for different M. naasi races to mitigate agricultural losses.