Founder events as determinants of within-island and among-island genetic structure of Daphnia metapopulations

Article Abstract:

Allozyme variation in rock pool metapopulation of two species of waterfleas (Daphnia) is studied with the aim to understand how these dynamics influence genetic differentiation. The genetic population structure in metapopulation is explained by strong drift during colonization, local inbreeding, which results in hybrid vigor and increased effective migration rates after subsequent immigration and effects selection through hitchhiking of neutral genes with linked loci under selection.

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Habitat size and the genetic structure of a cyclical parthenogen, Daphnia magna

Article Abstract:

The habitat size and genetic structure of a cyclical parthenogen, Daphnia magna is observed. It is seen that clonal and allelic diversity in populations from such small water bodies are lower than in populations from larger water bodies suggesting that genetic drift is a more prominent feature of populations inhabiting small water bodies than previously thought.

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X chromosome influences sperm length in the stalk-eyed fly Crytodiopsis dalmanni

Article Abstract:

A research is done to determine the chromosonal locations of quantitative trait loci (QTL) that affect the spermatocyst tail length in the stalk-eyed, Cyrtodiopsos dalmanni, by applying F2 progeny separating for an X-linked factor that causes sex-ratio meiotic drive.

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