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Molecular dating has now become a common tool for many biologists and considerable methodological improvements have been made over the last few years. However, the practice of estimating divergence times using molecular data is highly variable among researchers and it is not straightforward for a newcomer to the field to know how to start. Here I provide a brief overview of the current state-of-the-art of molecular dating practice. I review some of the important choices that must be made when conducting a divergence time analysis, including how to select and use calibrations and which relaxed clock model and program to use, with a focus on some practical aspects. I then provide some guidelines for the interpretation of results and briefly review some alternatives to molecular dating for obtaining divergence times. Last, I present some promising developments for the future of the field, related to the improvement of the calibration process. Previous Article Multiple independent appearances of the cecal appendix in mammalian evolution and an investigation of related ecological and anatomical factors Heather F.
Toggle navigation. Have you forgotten your login? Phylogeny, molecular dating and floral evolution of Magnoliidae Angiospermae. Julien Massoni 1 Details.
The comparison of DNA and protein sequences of extant species might be informative for reconstructing the chronology of evolutionary events on Earth. A phylogenetic tree inferred from molecular data directly depicts the evolutionary affinities of species and indirectly allows estimating the age of their origin and diversification. Molecular dating is achieved by assuming the molecular clock hypothesis, i. If paleontological calibrations are available, then absolute divergence times of species can be estimated.
SuperTriplets — A supertree approach to phylogenomics based on triplets. It infers supertrees with branch support values. Tougard C. Salmo macrostigma Teleostei, Salmonidae : nothing more than a brown trout S. Journal of Fish Biology.