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PHYLOGENETIC UTILITY OF rbc S SEQUENCES: AN EXAMPLE FROM ANTITHAMNION AND RELATED GENERA (CERAMIACEAE, RHODOPHYTA)
Author(s) -
Lee SangRae,
Oak Jung Hyun,
Suh Youngbae,
Lee In Kyu
Publication year - 2001
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1046/j.1529-8817.2001.01038.x
Subject(s) - biology , phylogenetic tree , subgenus , maximum parsimony , clade , phylogenetics , taxon , evolutionary biology , zoology , botany , taxonomy (biology) , genetics , gene
We report the potential phylogenetic utility of the small RUBISCO subunit ( rbc S) sequences from a sampling of Antithamnion and related genera in ceramiacean algae. The size of rbc S was 417 bp for all taxa examined. Analyses of the DNA sequence data indicated that pairwise divergences of rbc S sequences were 3.3%–9.8% among species of Antithamnion , and ranged from 13.6% to 18.0% between Antithamnion and related genera. Phylogenetic analyses fully resolved relationships at the intrageneric level with statistical significance supported by high bootstrap values. Two subgenera of Antithamnion , Pteroton and Antithamnion , were clearly distinguished in the molecular tree. In the clade of subgenus Pteroton , A. aglandum was allied with A. callocladum and separated from A. nipponicum. In the pairwise distance comparison of sequence variation, Ceramium showed the greatest genetic distances among genera examined in the study. All phylogenetic trees generated by the maximum parsimony, neighbor joining, and maximum likelihood were completely congruent in topology with high confidence.