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Related Experiment Videos

Generalized transduction in Rhizobium meliloti.

T Sik, J Horváth, S Chatterjee

    Molecular & General Genetics : MGG
    |January 1, 1980
    PubMed
    Summary

    Rhizobium meliloti phage 11 mediates generalized transduction, enabling gene transfer and mapping bacterial DNA. This study confirmed phage 11

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    Area of Science:

    • Microbiology
    • Bacteriology
    • Molecular Biology

    Background:

    • Phage 11 is a bacteriophage that infects Rhizobium meliloti.
    • Generalized transduction is a mechanism of horizontal gene transfer mediated by bacteriophages.

    Purpose of the Study:

    • To confirm and characterize the generalized transduction capabilities of Rhizobium meliloti phage 11.
    • To construct a partial genetic map of R. meliloti using phage 11-mediated cotransduction.

    Main Methods:

    • Generalized transduction experiments using phage 11.
    • Detection of transducing particles containing BUdR-labelled bacterial DNA.
    • Mapping of linked alleles via cotransduction.
    • Comparison of cotransductional linkage with conjugational linkage.

    Main Results:

    • Phage 11 demonstrated generalized transduction, transferring various single genetic markers.
    • Transduction frequencies varied depending on the specific marker.
    • A partial genetic map was constructed, identifying the relative positions of str, cml, pur-19, and leu-44 loci.
    • Cotransductional mapping data were compared with existing conjugation data.

    Conclusions:

    • Phage 11 is a reliable tool for generalized transduction in R. meliloti.
    • Cotransduction with phage 11 allows for the mapping of bacterial genes.
    • The study provides a foundational genetic map for R. meliloti, integrating different genetic mapping techniques.

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