Absence of repetitive DNA sequences associated with sex chromosomes in natural populations of the Trinidad guppy (Poecilia reticulata) |
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| Authors: | Kelly Hornaday Stephen Alexander Felix Breden |
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| Affiliation: | (1) GDivision of Biological Sciences, University of Missouri, 65211 Columbia, Missouri, USA;(2) Department of Biological Sciences, Simon Fraser University, V5A 1S6 Burnaby, B.C., Canada |
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| Abstract: | The genus Poecilia has been widely studied as a model for the evolution of sex chromosomes. In the course of molecular studies on population genetic structure and sexual selection in the Trinidad guppy, we examined our preparations for male-linked, repetitive DNA polymorphisms. We have not obtained any evidence of male-specific polymorphisms, in contrast to an earlier study. Our results have significant implications for theories on the evolution of sex chromosomes.Correspondence to: F. Breden |
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| Keywords: | Chromosomal sex determination Heterochromatin DNA fingerprinting Repeated DNA sequences |
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