caa a22 4500 475806522 CHVBK 20180406123748.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1007/BF00985326 doi (NATIONALLICENCE)springer-10.1007/BF00985326 Vargas P. Real Jardín Botánico, CSIC, Plaza de Murillo, E-28014, Madrid, Spain aut A phylogenetic study of Saxifraga sect. Saxifraga (Saxifragaceae) based on nrDNA ITS sequences [Elektronische Daten] [P. Vargas] Parsimony analyses of 54 nrDNA ITS (Internal Transcribed Spacer) sequences ofSaxifraga sect.Saxifraga were performed. In addition to some unresolved clades, there is strong disagreement between the ITS phylogeny and previous classifications based primarily on morphology. The extensive cytological instability of sect.Saxifraga prevents previous cytotaxonomical results from resolving the incongruence between molecular and morphological data. Dissimilar topologies between chloroplast (matK) and nuclear (ITS) trees for eight species of sect.Saxifraga suggest that gene trees and the true species tree are not coincident. Recent and mid-term reticulation is proposed as an explanation for the incongruence between morphological, cytological, organellar, and nuclear data. Homogenization in multigene families, such as the ITS region, via concerted evolution may be the key to the interpretation of results based on ITS sequences within sect.Saxifraga. The use of organellar genes in a larger sample should help to determine whether extensive reticulation occurs in sect.Saxifraga, as has been documented in various genera of Saxifragaceae. Springer-Verlag, 2000 Saxifragaceae nationallicence Saxifraga nationallicence sect. Saxifraga nationallicence ITS sequences nationallicence classification nationallicence reticulation nationallicence Plant Systematics and Evolution Springer-Verlag 223/1-2(2000-03-01), 59-70 0378-2697 223:1-2<59 2000 223 606 https://doi.org/10.1007/BF00985326 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00985326 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Vargas P. Real Jardín Botánico, CSIC, Plaza de Murillo, E-28014, Madrid, Spain aut NATIONALLICENCE 773 0- Plant Systematics and Evolution Springer-Verlag 223/1-2(2000-03-01), 59-70 0378-2697 223:1-2<59 2000 223 606 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer