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| Author(s): |
Juliana José
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Biologia |
| Defense date: | 2009-01-15 |
| Examining board members: |
Sérgio Furtado dos Reis;
Vera Nisaka Solferini;
André Victor Lucci Freitas;
Evandro Marsola de Moraes;
Wesley Augusto Conde Godoy
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| Advisor: | Sérgio Furtado dos Reis; Jose Alexandre Felizola Diniz Filho |
| Abstract | |
The amount of genetic variability on species can be influenced by factors acting in different levels of biological organization, and the ones related to population dynamics have been extensively studied. However, past studies neglected the influence of evolutionary history on genetic variability. We studied for the first time the influence of evolutionary history on species genetic variability and how the influence of evolutionary history changes pre-established relationships between variability and other species traits. For our investigations we used phylogenetic comparative methods and complex network analysis. Computer simulations on neutral models of evolution showed influence of evolutionary history and also provide us expectations for a phylogenetic signal on genetic variability. We in fact observed the previously expected phylogenetic signal in a wide variety of animal groups, which compose a database of 1521 species sampled for allozymic genetic diversity. We also detected the influence of species evolutionary history on its genetic variability in the modularity patterns of networks representing genetic diversity similarities between species. When considering evolutionary history on the analysis of genetic variability relationships with other species traits, we observed weaker relationships than those previously established on literature. (AU) | |