Vous êtes iciPublications

Partial combination applied to phylogeny of European cyprinids using the mitochondrial control region

Par Cyril - Posté le 17 avril 2014

TitrePartial combination applied to phylogeny of European cyprinids using the mitochondrial control region
Type de publicationMiscellaneous
Nouvelles publications2001
AuteursGilles A, Lecointre G, Miquelis A, Loerstcher M, Chappaz R, Brun G
RésuméPrevious molecular phylogenies of European cyprinids led to some solid facts and some uncertainties. This study is based on a stretch of more than 1 kb in the mitochondrial control region newly sequenced for 35 European cyprinids and on previous cytochrome b and 16S rDNA data. The trees based on the control region are more accurate and robust than those obtained from the two other genes. Character incongruence among the three genes was tested using the incongruence length difference (ILD) test. Iterative removals of individual sequences followed by new ILD tests identified two sequences responsible for statistically significant incongruence. A partial combination was conducted, that is, a combination of the three data sets, removing the two sequences previously identified. The phylogenetic analysis of this partial combination gives a more robust and resolved picture of subfamilial interrelationships, The Rasborinae are the sister group of all other cyprinids. The monophyletic Cyprininae emerges next. Tinca tinca first and then Rhodeus are the sister groups of all the remaining nonrasborine and noncyprinine species. Gobio is the sister group of the Leuciscinae, in which the Phoxinini are the sister group of the Leuciscini. Within the Leuciscini, the genus Leuciscus and the subfamily Alburninae are both paraphyletic. The Rasborinae are the most basal cyprinid subfamily and the Tincinae are not the sister group of the Cyprininae. These two results challenge only two anatomical characters, which need to be reinterpreted or considered as homoplastic in cyprinid evolution: the modification of the first pleural rib and its parapophysis and the bony composition of the interorbital septum. (C) 2001 Academic Press.