Differential Rates of Male Genital Evolution in Sibling Species of Drosophila

Genital morphology in animals with internal fertilization is considered to be among the fastest evolving traits. Sexual selection is often proposed as the main driver of genital diversification but the exact selection mechanisms involved are usually unclear. In addition, the mechanisms operating may...

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Autores principales: Stefanini, M.I., Milla Carmona, P., Iglesias, P.P., Soto, E.M., Soto, I.M.
Formato: JOUR
Materias:
Aedeagus
Morphological disparity
Morphological evolution
Sexual selection
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00713260_v45_n2_p211_Stefanini
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00713260_v45_n2_p211_Stefanini
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spelling todo:paper_00713260_v45_n2_p211_Stefanini2023-10-03T14:53:16Z Differential Rates of Male Genital Evolution in Sibling Species of Drosophila Stefanini, M.I. Milla Carmona, P. Iglesias, P.P. Soto, E.M. Soto, I.M. Aedeagus Morphological disparity Morphological evolution Sexual selection Genital morphology in animals with internal fertilization is considered to be among the fastest evolving traits. Sexual selection is often proposed as the main driver of genital diversification but the exact selection mechanisms involved are usually unclear. In addition, the mechanisms operating may differ even between pairs of sibling species. We investigated patterns of male genital variation within and between natural populations of the cactophilic fly Drosophila koepferae ranging its entire geographic distribution and compared them with those previously observed in its sibling species, D. buzzatii. Using both mtDNA and nDNA markers we found that genital shape variation in D. koepferae is more restricted than expected for neutral evolution, suggesting the predominance of stabilizing selection. We also detected dissimilar patterns of divergence between populations of D. koepferae that were allopatric and sympatric with D. buzzatii. The constrained evolution inferred for D. koepferae’s genitalia clearly contrasts with the rapid divergence and higher morphological disparity observed in the populations of D. buzzatii. Finally, different possible scenarios of male genital evolution in each species and within the radiation of D. buzzatii cluster are discussed. © 2018, Springer Science+Business Media, LLC, part of Springer Nature. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00713260_v45_n2_p211_Stefanini
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Aedeagus
Morphological disparity
Morphological evolution
Sexual selection
spellingShingle Aedeagus
Morphological disparity
Morphological evolution
Sexual selection
Stefanini, M.I.
Milla Carmona, P.
Iglesias, P.P.
Soto, E.M.
Soto, I.M.
Differential Rates of Male Genital Evolution in Sibling Species of Drosophila
topic_facet Aedeagus
Morphological disparity
Morphological evolution
Sexual selection
description Genital morphology in animals with internal fertilization is considered to be among the fastest evolving traits. Sexual selection is often proposed as the main driver of genital diversification but the exact selection mechanisms involved are usually unclear. In addition, the mechanisms operating may differ even between pairs of sibling species. We investigated patterns of male genital variation within and between natural populations of the cactophilic fly Drosophila koepferae ranging its entire geographic distribution and compared them with those previously observed in its sibling species, D. buzzatii. Using both mtDNA and nDNA markers we found that genital shape variation in D. koepferae is more restricted than expected for neutral evolution, suggesting the predominance of stabilizing selection. We also detected dissimilar patterns of divergence between populations of D. koepferae that were allopatric and sympatric with D. buzzatii. The constrained evolution inferred for D. koepferae’s genitalia clearly contrasts with the rapid divergence and higher morphological disparity observed in the populations of D. buzzatii. Finally, different possible scenarios of male genital evolution in each species and within the radiation of D. buzzatii cluster are discussed. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.
format JOUR
author Stefanini, M.I.
Milla Carmona, P.
Iglesias, P.P.
Soto, E.M.
Soto, I.M.
author_facet Stefanini, M.I.
Milla Carmona, P.
Iglesias, P.P.
Soto, E.M.
Soto, I.M.
author_sort Stefanini, M.I.
title Differential Rates of Male Genital Evolution in Sibling Species of Drosophila
title_short Differential Rates of Male Genital Evolution in Sibling Species of Drosophila
title_full Differential Rates of Male Genital Evolution in Sibling Species of Drosophila
title_fullStr Differential Rates of Male Genital Evolution in Sibling Species of Drosophila
title_full_unstemmed Differential Rates of Male Genital Evolution in Sibling Species of Drosophila
title_sort differential rates of male genital evolution in sibling species of drosophila
url http://hdl.handle.net/20.500.12110/paper_00713260_v45_n2_p211_Stefanini
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AT iglesiaspp differentialratesofmalegenitalevolutioninsiblingspeciesofdrosophila
AT sotoem differentialratesofmalegenitalevolutioninsiblingspeciesofdrosophila
AT sotoim differentialratesofmalegenitalevolutioninsiblingspeciesofdrosophila
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