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Neutral effect of recombination on base composition in Drosophila

Published online by Cambridge University Press:  30 April 2003

GABRIEL MARAIS
Affiliation:
Laboratoire ‘Biométrie et Biologie Evolutive’, UMR 5558, Bâtiment Gregor Mendel, Université Claude Bernard – Lyon 1, 69622 Villeurbanne Cedex, France Present address: Institute of Cell, Animal and Population Biology, University of Edinburgh, Edinburgh EH9 3JT, UK.
DOMINIQUE MOUCHIROUD
Affiliation:
Laboratoire ‘Biométrie et Biologie Evolutive’, UMR 5558, Bâtiment Gregor Mendel, Université Claude Bernard – Lyon 1, 69622 Villeurbanne Cedex, France
LAURENT DURET
Affiliation:
Laboratoire ‘Biométrie et Biologie Evolutive’, UMR 5558, Bâtiment Gregor Mendel, Université Claude Bernard – Lyon 1, 69622 Villeurbanne Cedex, France
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Abstract

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Recombination is thought to have various evolutionary effects on genome evolution. In this study, we investigated the relationship between the base composition and recombination rate in the Drosophila melanogaster genome. Because of a current debate about the accuracy of the estimates of recombination rate in Drosophila, we used eight different measures of recombination rate from recent work. We confirmed that the G+C content of large introns and flanking regions is positively correlated with recombination rate, suggesting that recombination has a neutral effect on base composition in Drosophila. We also confirmed that this neutral effect of recombination is the main determinant of the correlation between synonymous codon usage bias and recombination rate in Drosophila.

Type
Research Article
Copyright
© 2003 Cambridge University Press