Hello Franz, I don’t come with a solution but rather a suggestion, you should look at this paper:
Revell, Harmon and Collar 2008 Phylogenetic signal, evolutionary process and rate. Systematic Biology 57: 591-601 In brief the authors of that paper point out that comparative methods analyzing trait evolution provide information about patterns in the data, however there may be different evolutionary processes that can lead to highly similar patterns in the data, thus it is hard to conclude anything about evolutionary processes only from information about evolutionary patterns. Cheers Alejandro _______________________________________________ Dr Alejandro Gonzalez Voyer Laboratorio de Conducta Animal Instituto de Ecología Circuito Exterior S/N Ciudad Universitaria Universidad Nacional Autónoma de México México, D.F. 04510 México Tel: +52 55 5622 9044 E-mail: alejandro.gonza...@iecologia.unam.mx Web: www.alejandrogonzalezvoyer.com > El 04/03/2016, a las 11:00, f.k...@mailbox.org escribió: > > Dear everyone, > > I want to test if a trait evolved by random drift only without selection. > My hypothesis regarding a specific trait - I don’t want to tell which if it > turns out to be a good idea ;-) - is, > that there is no selection acting on it and it is evolving by random > mutations only. Thus u can see phenotypic differences between the species > but without selection advantage or disadvantage for the species. > > So now I’m looking for models and R packages. > I first thought about diversitree. make.quasse with and without drift and > compare the models… > However, the problem is, that my data is a discrete multitrait and not > continuous. Thus I think brownian motion models are not the right thing to > look at? > > Then I thought about just testing for clustering in the tips and compare with > a random distribution of the trait… > But since its its a multitrait and the phylogeny is not super big, I think > this method is not good for discriminating the randomness… > > I really hope anyone can give me some advice which methods might be suitable. > Are there any at all? > It seems its not easy since the only thing I really found was brownian > motion... > > Cheers, > Franz > > > > Franz-Sebastian Krah > PhD student, Fungal Ecology and Evolution > Plant Biodiversity Research Group > Technische Universität München (TUM) > Mobile: 0170 5221189 > Personal Website <http://franzkrah.github.io/> and University Website > <http://www.biodiv.wzw.tum.de/index.php?id=18> > > > > > > > > > > [[alternative HTML version deleted]] > > _______________________________________________ > R-sig-phylo mailing list - R-sig-phylo@r-project.org > https://stat.ethz.ch/mailman/listinfo/r-sig-phylo > Searchable archive at http://www.mail-archive.com/r-sig-phylo@r-project.org/ [[alternative HTML version deleted]] _______________________________________________ R-sig-phylo mailing list - R-sig-phylo@r-project.org https://stat.ethz.ch/mailman/listinfo/r-sig-phylo Searchable archive at http://www.mail-archive.com/r-sig-phylo@r-project.org/
