Evolutionary divergence between two closely related species: Drosophila madeirensis and D. subobscura : quantitative genetic differentiation, reproductive barriers and evolutionary potential

Detalhes bibliográficos
Autor(a) principal: Rego, Carla José Azevedo
Data de Publicação: 2007
Idioma: eng
Título da fonte: Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)
Texto Completo: http://hdl.handle.net/10451/1680
Resumo: Tese de doutoramento em Biologia (Biologia Evolutiva), apresentada à Universidade de Lisboa através da Faculdade de Ciências, 2008
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spelling Evolutionary divergence between two closely related species: Drosophila madeirensis and D. subobscura : quantitative genetic differentiation, reproductive barriers and evolutionary potentialBiologia evolutivaTeses de doutoramentoTese de doutoramento em Biologia (Biologia Evolutiva), apresentada à Universidade de Lisboa através da Faculdade de Ciências, 2008Speciation and species differentiation are very important issues in Evolutionary Biology. This thesis focuses several aspects related with the differentiation between two closely related species, Drosophila madeirensis and Drosophila subosbcura, namely the contribution of additive and non-additive genetic effects to that differentiation, the contribution of assortative mating to their reproductive isolation, the analysis of hybrid developmental problems expressed as higher fluctuating asymmetry and their underlying causes (developmental noise), and the implications of species differentiation in terms of adaptation to a novel, common environment. The results indicate that negative dominance and epistasis are both involved in the genetic differentiation between these species. Both species present assortative mating, conspecific matings being more likely. Furthermore, the two reciprocal cross directions apparently present different reproductive barriers. In the cross involving D. madeirensis females the barrier is mostly prezygotic, with mating being hard to observe, however, this cross direction yields a high number of hybrids with an even sex-ratio. On the other hand, mating in the reciprocal cross is easy to observe but produces fewer hybrids with a male-biased sex ratio. The analysis comparing fluctuating asymmetry levels between hybrids and parental species indicates that, although hybridization disrupts developmental buffering, hybrid females presenting higher asymmetry, this disruption does not reflect higher developmental noise, as fluctuating asymmetry levels are similar to parental species. The results comparing species differences in life history traits and evolutionary dynamics indicate that these closely related species differ in the adaptation to new conditions (captivity). These findings have important implications for several fields, namely Evolutionary Biology, Speciation, Development and Conservation, which are discussed at the end of this thesis.FCT (PhD Fellowship: PRAXIS XXI/BD/21479/99)Matos, Margarida Maria Demony de Carneiro Pacheco de, 1958-Repositório da Universidade de LisboaRego, Carla José Azevedo2010-07-27T09:01:08Z20072007-01-01T00:00:00Zdoctoral thesisinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdftext/xmlhttp://hdl.handle.net/10451/1680enginfo:eu-repo/semantics/openAccessreponame:Repositórios Científicos de Acesso Aberto de Portugal (RCAAP)instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiainstacron:RCAAP2025-03-17T12:39:53Zoai:repositorio.ulisboa.pt:10451/1680Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireinfo@rcaap.ptopendoar:https://opendoar.ac.uk/repository/71602025-05-29T02:25:11.127727Repositórios Científicos de Acesso Aberto de Portugal (RCAAP) - FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologiafalse
dc.title.none.fl_str_mv Evolutionary divergence between two closely related species: Drosophila madeirensis and D. subobscura : quantitative genetic differentiation, reproductive barriers and evolutionary potential
title Evolutionary divergence between two closely related species: Drosophila madeirensis and D. subobscura : quantitative genetic differentiation, reproductive barriers and evolutionary potential
spellingShingle Evolutionary divergence between two closely related species: Drosophila madeirensis and D. subobscura : quantitative genetic differentiation, reproductive barriers and evolutionary potential
Rego, Carla José Azevedo
Biologia evolutiva
Teses de doutoramento
title_short Evolutionary divergence between two closely related species: Drosophila madeirensis and D. subobscura : quantitative genetic differentiation, reproductive barriers and evolutionary potential
title_full Evolutionary divergence between two closely related species: Drosophila madeirensis and D. subobscura : quantitative genetic differentiation, reproductive barriers and evolutionary potential
title_fullStr Evolutionary divergence between two closely related species: Drosophila madeirensis and D. subobscura : quantitative genetic differentiation, reproductive barriers and evolutionary potential
title_full_unstemmed Evolutionary divergence between two closely related species: Drosophila madeirensis and D. subobscura : quantitative genetic differentiation, reproductive barriers and evolutionary potential
title_sort Evolutionary divergence between two closely related species: Drosophila madeirensis and D. subobscura : quantitative genetic differentiation, reproductive barriers and evolutionary potential
author Rego, Carla José Azevedo
author_facet Rego, Carla José Azevedo
author_role author
dc.contributor.none.fl_str_mv Matos, Margarida Maria Demony de Carneiro Pacheco de, 1958-
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Rego, Carla José Azevedo
dc.subject.por.fl_str_mv Biologia evolutiva
Teses de doutoramento
topic Biologia evolutiva
Teses de doutoramento
description Tese de doutoramento em Biologia (Biologia Evolutiva), apresentada à Universidade de Lisboa através da Faculdade de Ciências, 2008
publishDate 2007
dc.date.none.fl_str_mv 2007
2007-01-01T00:00:00Z
2010-07-27T09:01:08Z
dc.type.driver.fl_str_mv doctoral thesis
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10451/1680
url http://hdl.handle.net/10451/1680
dc.language.iso.fl_str_mv eng
language eng
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eu_rights_str_mv openAccess
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application/pdf
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instname:FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
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instname_str FCCN, serviços digitais da FCT – Fundação para a Ciência e a Tecnologia
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