A phylogenetic analysis of Epilobium (Onagraceae) based on nuclear ribosomal DNA sequences

The internal transcribed spacers and 5.8S cistron of nuclear ribosomal DNA were sequenced from 22 species of Epilobium and two outgroups. Phylogenies were inferred from the sequences using parsimony, neighbor-joining, maximum-likelihood, and compatibility analysis. With parsimony we explored the eff...

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Bibliographic Details
Published in:Systematic botany 1994-07, Vol.19 (3), p.363-388
Main Author: Hoch, P.C
Format: Article
Language:English
Subjects:
ADN
Biological and medical sciences
Biological taxonomies
DISTRIBUCION NATURAL
DISTRIBUTION NATURELLE
Evolution
FILOGENIA
Fundamental and applied biological sciences. Psychology
Genes
GENETICA
GENETIQUE
ONAGRACEAE
Parsimony
Phylogenetics
PHYLOGENIE
Phylogeny
Plant cytology, morphology, systematics, chorology and evolution
Plant evolution
Plants
Pollen
Ravens
Ribosomal DNA
RIBOSOMAS
RIBOSOME
SECUENCIA NUCLEICA
SEQUENCE NUCLEIQUE
TAXONOMIA
TAXONOMIE
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Summary:The internal transcribed spacers and 5.8S cistron of nuclear ribosomal DNA were sequenced from 22 species of Epilobium and two outgroups. Phylogenies were inferred from the sequences using parsimony, neighbor-joining, maximum-likelihood, and compatibility analysis. With parsimony we explored the effect of different weights for insertions/deletions (indels) vs. substitutions, coding vs. non-coding regions, transitions vs. transversions, and a posteriori character reweighting. Section Chamaenerion was found to be sister to the rest of the genus. The remainder of Epilobium fell into two main clades: 1) sect. Epilobium, and 2) the "xerophytic" clade, which comprises the remaining six sections. The unusual species E. rigidum (sect. Epilobium) had an uncertain position, appearing either at the base of sect. Epilobium, the base of the "xerophytic" clade, or as sister to the entire genus except sect. Chamaenerion. Within the "xerophytic" clade, relationships were incompletely resolved but a monophyletic group consisting of the annual sects. Boisduvalia and Currania (both formerly constituting the genus Boisduvalia) and the perennial, hummingbird-pollinated sect. Zauschneria was supported. The molecular phylogeny is compatible with some important independent characters and is useful for interpreting morphological and cytological evolution in Epilobium
ISSN:0363-6445
1548-2324
DOI:10.2307/2419763