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Related Experiment Videos

Supergenes in polymorphic land snails. I. Partula taeniata.

J Murray, B Clarke

    Heredity
    |October 1, 1976
    PubMed
    Summary

    Shell color in Partula taeniata snails is controlled by multiple gene loci, including those for basic color, pink modification, lip color, spire color, and shell banding. These genes form a supergene, with self-fertilization occurring mainly early in life.

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    Area of Science:

    • Genetics
    • Molluscan biology
    • Evolutionary biology

    Background:

    • Shell color and pattern are key traits in Partula snails.
    • Understanding the genetic basis of these traits is crucial for evolutionary studies.

    Purpose of the Study:

    • To elucidate the genetic control of shell coloration and banding in Partula taeniata.
    • To investigate the inheritance patterns and potential linkage of color and banding loci.

    Main Methods:

    • Classical Mendelian genetics analysis.
    • Observation of inheritance patterns across generations.
    • Analysis of shell color, lip color, spire color, and banding phenotypes.

    Main Results:

    • Shell color is controlled by at least two loci (C and P), with multiple alleles influencing yellow, brown, and pink hues.
    • Lip color (L locus) and spire color (S locus) are inherited independently.
    • Shell banding is controlled by two loci (B1 and B2), with specific alleles determining frenata, zonata, and lyra patterns.
    • All studied loci exhibit strong linkage, suggesting a supergene.
    • Self-fertilization occurs, primarily early in reproductive life.

    Conclusions:

    • Partula taeniata shell coloration and banding are complex traits governed by a tightly linked set of genes (supergene).
    • The genetic architecture supports the evolution of diverse shell phenotypes within the species.
    • Self-fertilization plays a role in reproduction, with potential implications for genetic diversity.

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