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.[1]
Limitationsedit
The method performs poorly when used to select an outgroup taxon, to quantify the amount of phylogenetic signal present, or to identify taxa that may be prone to long branch attraction.[2]
Referencesedit
^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.
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relative, apparent, synapomorphy, analysis, rasa, method, that, aims, determine, whether, given, character, shared, between, taxa, shared, ancestry, convergence, synapomorphy, shared, trait, found, among, more, taxa, their, most, recent, common, ancestor, whos. 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 1 Limitations editThe method performs poorly when used to select an outgroup taxon to quantify the amount of phylogenetic signal present or to identify taxa that may be prone to long branch attraction 2 References edit 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 nbsp This biology article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Relative apparent synapomorphy analysis amp oldid 1170582298, wikipedia, wiki, book, books, library,
