Molecular systematics of the Brassicaceae: evidence from coding plastidic matK and nuclear Chs sequences.
Journal Article (Journal Article)
Phylogenetic relationships were inferred using nucleotide sequence variation of the nuclear-encoded chalcone synthase gene (Chs) and the chloroplast gene matK for members of five tribes from the family Brassicaceae to analyze tribal and subtribal structures. Phylogenetic trees from individual data sets are mostly in congruence with the results from a combined matK-Chs analysis with a total of 2721 base pairs, but with greater resolution and higher statistical support for deeper branching patterns. The analysis indicates that tribes Lepidieae, Arabideae, and Sisymbrieae are not monophyletic. Among taxa under study four different lineages each were detected in tribes Arabideae and Lepidieae, interspersed with taxa from tribes Sisymbrieae, Hesperideae, and Brassiceae. It is concluded that tribe Brassiceae might be the only monophyletic group of the traditional tribes. From our data we estimated several divergence times for different lineages among cruciferous plants: 5.8 mya (million years ago) for the Arabidopsis-Cardaminopsis split, 20 mya for the Brassica-Arabidopsis split, and ∼40 mya for the age of the deepest split between the most basal crucifer Aethionema and remaining cruciferous taxa.
Full Text
Duke Authors
Cited Authors
- Koch, M; Haubold, B; Mitchell-Olds, T
Published Date
- March 2001
Published In
Volume / Issue
- 88 / 3
Start / End Page
- 534 - 544
PubMed ID
- 11250830
Electronic International Standard Serial Number (EISSN)
- 1537-2197
International Standard Serial Number (ISSN)
- 0002-9122
Digital Object Identifier (DOI)
- 10.2307/2657117
Language
- eng