Molecular Biology and Evolution, Vol 15, 345-354, Copyright © 1998 by Society for Molecular Biology and Evolution
M Cerbah, T Souza-Chies, MF Jubier, B Lejeune and S Siljak-Yakovlev
Sequences of the internal transcribed spacers (ITSs) of 18S-26S nuclear
ribosomal DNA were used to resolve phylogenetic relationships and
chromosomal evolution among 14 species of the genus Hypochaeris
(Asteraceae). Parsimony analysis was performed for phylogenetic
reconstruction, and sequence divergence between species was estimated.
Pairwise sequence divergence within Hypochaeris genus ranged from 0% to
25.68% in ITS1 and from 0% to 17.08% in ITS2. A highly resolved strict-
consensus tree was obtained that showed the phylogenetically useful
information of ITS sequences within the genus Hypochaeris. Four clades
could be well distinguished, one of them formed by the single species H.
robertia, which appeared to be the most related to the ancestral species of
the genus. The results agree with taxonomic classification based on
morphological data, and the tree obtained, when indels are coded as missing
data, aggregates the species having the same chromosome number, except in
one clade. According to the ITS phylogenetic tree, the chromosomal
evolution within the genus Hypochaeris conflicts with the previous
hypothesis and suggests that karyotype evolution in Hypochaeris was
accompanied with both decreasing and increasing dysploidy, probably with
several chromosomal rearrangements, and from an ancestral basic chromosome
number of 4 or 5.
ORIGINAL ARTICLE
Molecular phylogeny of the genus Hypochaeris using internal transcribed spacers of nuclear rDNA: inference for chromosomal evolution
Laboratoire d'Evolution et Systematique, U.R.A. C.N.R.S. 2154, Universite Paris XI, France. cerbah@esv.upsud.fr
CiteULike 
Connotea 
Del.icio.us What's this?
This article has been cited by other articles:
|
|
 |
|
  L. Peruzzi, I. J. Leitch, and K.F. Caparelli Chromosome diversity and evolution in Liliaceae Ann. Bot., February 1, 2009; 103(3): 459 - 475. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 R. Samuel, W. Gutermann, T. F. Stuessy, C. F. Ruas, H.-W. Lack, K. Tremetsberger, S. Talavera, B. Hermanowski, and F. Ehrendorfer Molecular phylogenetics reveals Leontodon (Asteraceae, Lactuceae) to be diphyletic Am. J. Botany, August 1, 2006; 93(8): 1193 - 1205. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. A. Carine, S. J. Russell, A. Santos-Guerra, and J. Francisco-Ortega Relationships of the Macaronesian and Mediterranean floras: molecular evidence for multiple colonizations into Macaronesia and back-colonization of the continent in Convolvulus (Convolvulaceae) Am. J. Botany, July 1, 2004; 91(7): 1070 - 1085. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. Samuel, T. F. Stuessy, K. Tremetsberger, C. M. Baeza, and S. Siljak-Yakovlev Phylogenetic relationships among species of Hypochaeris (Asteraceae, Cichorieae) based on ITS, plastid trnL intron, trnL-F spacer, and matK sequences Am. J. Botany, March 1, 2003; 90(3): 496 - 507. [Abstract] [Full Text] [PDF]
|
|