Relative apparent synapomorphy analysis
Relative apparent synapomorphy analysis, or RASA, is a method that aims to determine whether a given character is shared between taxa due to shared ancestry or due to convergence. A synapomorphy is a shared trait found among two or more taxa and their most recent common ancestor, whose ancestor in turn does not possess the trait. RASA assigns a score to the character based on its potential to be informative.
- Lyons-Weiler, J; Hoelzer, GA; Tausch, RJ (1996). "Relative apparent synapomorphy analysis (RASA). I: The statistical measurement of phylogenetic signal". Molecular Biology and Evolution. 13 (6): 749–57. doi:10.1093/oxfordjournals.molbev.a025635. PMID 8754211.
- Simmons, MP; Randle, CP; Freudenstein, JV; Wenzel, JW (2002). "Limitations of relative apparent synapomorphy analysis (RASA) for measuring phylogenetic signal". Molecular Biology and Evolution. 19 (1): 14–23. doi:10.1093/oxfordjournals.molbev.a003978. PMID 11752186.