Phylogenetic relationships among eukaryotic kingdoms inferred from ribosomal RNA sequences

Phylogenetic trees among eukaryotic kingdoms were inferred for large- and small-subunit rRNAs by using a maximum-likelihood method developed by Felsenstein. Although Felsenstein's method assumes equal evolutionary rates for transitions and transversions, this is apparently not the case for thes...

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Bibliographic Details
Published in:Journal of molecular evolution 1985-01, Vol.22 (1), p.32-38
Main Authors: HASEGAWA, M, IIDA, Y, YANO, T.-A, TAKAIWA, F, IWABUCHI, M
Format: Article
Language:English
Subjects:
Animals
Base Sequence
Biological and medical sciences
Biological evolution
Dictyostelium - genetics
Escherichia coli - genetics
Fundamental and applied biological sciences. Psychology
Genetics of eukaryotes. Biological and molecular evolution
Oryza - genetics
Phylogeny
Physarum - genetics
Plants - genetics
Rats
RNA, Ribosomal - genetics
Saccharomyces cerevisiae - genetics
Space life sciences
Species Specificity
Xenopus
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Summary:Phylogenetic trees among eukaryotic kingdoms were inferred for large- and small-subunit rRNAs by using a maximum-likelihood method developed by Felsenstein. Although Felsenstein's method assumes equal evolutionary rates for transitions and transversions, this is apparently not the case for these data. Therefore, only transversion-type substitutions were taken into account. The molecules used were large-subunit rRNAs from Xenopus laevis (Animalia), rice (Plantae), Saccharomyces cerevisiae (Fungi), Dictyostelium discoideum (Protista), and Physarum polycephalum (Protista); and small-subunit rRNAs from maize (Plantae), S. cerevisiae, X. laevis, rat (Animalia), and D. discoideum. Only conservative regions of the nucleotide sequences were considered for this study. In the maximum-likelihood trees for both large- and small-subunit rRNAs, Animalia and Fungi were the most closely related eukaryotic kingdoms, and Plantae is the next most closely related kingdom, although other branching orders among Plantae, Animalia, and Fungi were not excluded by this work. These three eukaryotic kingdoms apparently shared a common ancestor after the divergence of the two species of Protista, D. discoideum and P. polycephalum. These two species of Protista do not form a clade, and P. polycephalum diverged first and D. discoideum second from the line leading to the common ancestor of Plantae, Animalia, and Fungi. The sequence data indicate that a drastic change occurred in the nucleotide sequences of rRNAs during the evolutionary separation between prokaryote and eukaryote.
ISSN:0022-2844
1432-1432
DOI:10.1007/BF02105802