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Related Experiment Videos

Allozyme variation in bumble bees (Hymenoptera: Apidae).

R E Owen1, L J Mydynski, L Packer

  • 1Department of Chemical and Biological Sciences, Mount Royal College, Calgary, Alberta, Canada.

Biochemical Genetics
|October 1, 1992
PubMed
Summary

Allozyme variation in bumble bees (Bombus and Psithyrus) reveals significantly low genetic diversity, suggesting a very small effective population size for these important pollinators.

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Area of Science:

  • Ecology
  • Evolutionary Biology
  • Genetics

Background:

  • Bumble bees (Bombus and Psithyrus) are crucial pollinators facing ecological challenges.
  • Understanding their genetic diversity is vital for conservation efforts.
  • Previous studies on bumble bee genetic variation used limited genetic markers.

Purpose of the Study:

  • To assess allozyme variation across multiple loci in North American bumble bee species.
  • To compare genetic diversity levels between Bombus and Psithyrus genera.
  • To infer population dynamics based on observed genetic variation.

Main Methods:

  • Allozyme electrophoresis was used to analyze genetic variation.
  • An average of 37.3 loci were examined in queens of 16 Bombus and 2 Psithyrus species.

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  • Expected heterozygosity (H) was calculated and compared across species.

    • Main Results:

    • Mean expected heterozygosity (H) was low for both Bombus (0.008 ± 0.006) and Psithyrus (0.007 ± 0.007).
    • These levels are significantly lower than those observed in other Hymenoptera.
    • Genetic variation is comparable to previous bumble bee studies but based on more loci.

    Conclusions:

    • Observed low allozyme variation can be explained by neutral mutation and genetic drift.
    • This suggests a very small effective population size in bumble bee species.
    • Further research into population genetics is warranted for bumble bee conservation.