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Recombinations of mutant phages of Bacillus megatherium 899a

J S MURPHY

    The Journal of Experimental Medicine
    |December 1, 1953
    PubMed

    Insights

    Bacterial phage recombination was studied using mutant strains of Bacillus megatherium 899a phage. Recombination percentages were mathematically analyzed, revealing a single linkage group and low recombination rates (0.8-7.6%).

    Area of Science:

    • Microbiology
    • Molecular Biology
    • Genetics

    Background:

    • Lysogenic Bacillus megatherium 899a phage and its mutants were previously isolated.
    • Mutant phages exhibit characteristic plaque morphology, aiding identification.
    • Bacterial phage recombination is a key process in understanding viral genetics.

    Purpose of the Study:

    • To investigate recombination reactions among mutant phages of B. megatherium 899a.
    • To determine if phage recombination percentages follow genetic mapping principles.
    • To identify the number of linkage groups in these phage mutants.

    Main Methods:

    • Isolation and culturing of B. megatherium 899a phage mutants.
    • Infection of sensitive B. megatherium strains with different mutant phage pairs.
    • Analysis of recombination frequencies based on plaque morphology.
    • Electron microscopy to examine phage morphology.

    Main Results:

    • Recombination percentages were mathematically analyzed, similar to genetic crossover data.
    • A single linkage group was detected among the studied phage mutants.
    • Observed recombination percentages ranged from 0.8% to 7.6%.
    • Electron microscopy revealed no morphological differences between mutant strains.

    Conclusions:

    • The recombination data supports the concept of genetic mapping in B. megatherium phages.
    • The studied mutants belong to a single linkage group.
    • Phage recombination provides insights into viral genetic organization.
    Keywords:
    BACILLUSBACTERIOPHAGE

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