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Molecular phylogeny and the evolution of gall wasps
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för evolution, genomik och systematik, Systematisk zoologi.
Vise andre og tillknytning
(engelsk)Manuskript (Annet (populærvitenskap, debatt, mm))
Identifikatorer
URN: urn:nbn:se:uu:diva-91353OAI: oai:DiVA.org:uu-91353DiVA, id: diva2:164055
Tilgjengelig fra: 2004-02-11 Laget: 2004-02-11 Sist oppdatert: 2010-01-14bibliografisk kontrollert
Inngår i avhandling
1. Bayesian Phylogenetics and the Evolution of Gall Wasps
Åpne denne publikasjonen i ny fane eller vindu >>Bayesian Phylogenetics and the Evolution of Gall Wasps
2004 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis concerns the phylogenetic relationships and the evolution of the gall-inducing wasps belonging to the family Cynipidae. Several previous studies have used morphological data to reconstruct the evolution of the family. DNA sequences from several mitochondrial and nuclear genes where obtained and the first molecular, and combined molecular and morphological, analyses of higher-level relationships in the Cynipidae is presented. A Bayesian approach to data analysis is adopted, and models allowing combined analysis of heterogeneous data, such as multiple DNA data sets and morphology, are developed. The performance of these models is evaluated using methods that allow the estimation of posterior model probabilities, thus allowing selection of most probable models for the use in phylogenetics. The use of Bayesian model averaging in phylogenetics, as opposed to model selection, is also discussed.

It is shown that Bayesian MCMC analysis deals efficiently with complex models and that morphology can influence combined-data analyses, despite being outnumbered by DNA data. This emphasizes the utility and potential importance of using morphological data in statistical analyses of phylogeny.

The DNA-based and combined-data analyses of cynipid relationships differ from previous studies in two important respects. First, it was previously believed that there was a monophyletic clade of woody rosid gallers but the new results place the non-oak gallers in this assemblage (tribes Pediaspidini, Diplolepidini, and Eschatocerini) outside the rest of the Cynipidae. Second, earlier studies have lent strong support to the monophyly of the inquilines (tribe Synergini), gall wasps that develop inside the galls of other species. The new analyses suggest that the inquilines either originated several times independently, or that some inquilines secondarily regained the ability to induce galls. Possible reasons for the incongruence between morphological and DNA data is discussed in terms of heterogeneity in evolutionary rates among lineages, and convergent evolution of morphological characters.

sted, utgiver, år, opplag, sider
Uppsala: Acta Universitatis Upsaliensis, 2004. s. 43
Serie
Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1104-232X ; 937
Emneord
Biology, Bayesian analysis, Bayes factors, Cynipidae, gall wasps, MCMC, model averaging, model selection, phylogeny, total evidence, Biologi
HSV kategori
Identifikatorer
urn:nbn:se:uu:diva-3996 (URN)91-554-5872-6 (ISBN)
Disputas
2004-03-04, Lindahlsalen, Evolutionsbiologiskt centrum, Norbyvägen 18, Uppsala, 13:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2004-02-11 Laget: 2004-02-11 Sist oppdatert: 2009-04-02bibliografisk kontrollert

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