ESTIMATING PHYLOGENETIC INERTIA IN TITHONIA (ASTERACEAE): A COMPARATIVE APPROACH
Article first published online: 9 MAY 2007
Volume 54, Issue 2, pages 475–484, April 2000
How to Cite
Morales, E. (2000), ESTIMATING PHYLOGENETIC INERTIA IN TITHONIA (ASTERACEAE): A COMPARATIVE APPROACH. Evolution, 54: 475–484. doi: 10.1111/j.0014-3820.2000.tb00050.x
- Issue published online: 9 MAY 2007
- Article first published online: 9 MAY 2007
- Received January 13, 1999. Accepted August 18, 1999.
- Ancestor-state reconstruction;
- autoregression model;
- comparative method;
- phylogenetic inertia;
Abstract.— Phylogenetic inertia is a difficult issue in evolutionary biology because we have yet to reach a consensus about how to measure it. In this study a comparative approach is used to evaluate phylogenetic inertia in 14 demographic and morphological characters in 10 species and one subspecies of the genus Tithonia (Asteraceae). Three different methods, autocorrelational analysis, phylogenetic correlograms, and ancestor-state reconstruction, were used to evaluate phylogenetic inertia in these traits. Results were highly dependent on the method applied. Autoregression and phylogenetic eigenvector regression (PVR) methods found more inertia in morphological traits. In contrast, phylogenetic correlograms and ancestor-state reconstruction suggest that morphological characters exhibit less phylogenetic inertia than demographic ones. The differences between results are discussed and methods are compared in an effort to understand phylogenetic inertia more thoroughly.