Additional file 4: of Factors driving metabolic diversity in the budding yeast subphylum

Table S3. Over 50% of individual traits do not evolve under a Brownian model of evolution. To test for a phylogenetic signal in our data, we calculated D, a measure of dispersion used for binary traits that tests for a significant departure from both random associations (D = 1) and the clumping expected under a Brownian model of evolution (D = 0). Values that significantly differ from 0 suggest a trait is not evolving under Brownian evolution. The function calculates randomized data sets (n = 1000) for both departures from random distributions and patterns expected under a Brownian model of evolution. To test for phylogenetic randomness, the function randomly shuffles trait values relative to the tips of the phylogeny. To test for evolution under a Brownian model, the function evolves a continuous trait along the phylogeny under a Brownian process, and then it is converted to a binary trait using a threshold that reproduces the relative prevalence of the observed trait. (XLSX 11 kb