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Title of Journal: Genetica

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Abbravation: Genetica

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Springer Netherlands

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1573-6857

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Evolution of the male genitalia morphological var

Authors: Carlos A C Andrade R D Vieira G Ananina Louis B Klaczko
Publish Date: 2008/02/29
Volume: 135, Issue: 1, Pages: 13-23
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Abstract

To investigate the size and shape of the aedeagus of Drosophila mediopunctata we used basic statistics and geometric morphometrics We estimated the level of phenotypic variation natural and laboratory heritability as well as the phenotypic correlations between aedeagus and wing measures The wing was used as an indicator for both body size and shape Positive significant correlation was obtained for centroid size of aedeagus and wing for field parents and their offspring reared in the laboratory Many positive significant phenotypic correlations were found among linear measures of both organs The phenotypic correlations were few for aedeagus and wing shape Coefficients of variation of the measures were on average larger in the aedeagus than in the wing for offspring reared in laboratory but not for flies coming from the field Significant “natural” heritabilities were found for five linear measures of the aedeagus and only one for the wing Few significant heritabilities were found for aedeagus and wing shape mostly ones concerning the uniform components In an exploratory analysis we found that inversion DSPC0 is associated with both uniform and nonuniform components of shape respectively in the wing and aedeagus Our results do not support the lockandkey hypothesis for the male genitalia evolution but cannot refute the sexual selection and pleiotropy hypothesesIt is a pleasure to thank Mary A Heidi Dolder for her kind help with scanning electron micrographs Wilma Nascimento de Souza for technical help and Ted Hogan for reviewing the English version of the manuscript An anonymous reviewer made valuable comments on the manuscript The administrators of Fundação José Pedro de Oliveira allowed us to collect at Mata Santa Genebra This work was supported by Grants from Programa Institucional de Capacitação Docente e Técnica PICDT/Capes Conselho Nacional de Desenvolvimento Técnico e Científico CNPq Fundação de Amparo à Pesquisa de São Paulo FAPESP and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior CAPES

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