Phylogeny and evolution of the piroplasms
| Autor: | T. Cavalier-Smith, D.T. De Waal, B. A. Allsopp, M. T. E. P. Allsopp |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Paraphyly
Plasmodium Molecular Sequence Data Babesia DNA Ribosomal Polymerase Chain Reaction Piroplasmida Monophyly Phylogenetics Theileria Animals Conserved Sequence Phylogeny Genetics Oxytricha Base Sequence biology Phylogenetic tree Sarcocystis DNA Protozoan biology.organism_classification Biological Evolution Cytauxzoon Infectious Diseases Taxon Sister group RNA Ribosomal Evolutionary biology Dinoflagellida Animal Science and Zoology Parasitology Taxonomy (biology) Sequence Alignment Algorithms |
| Zdroj: | Parasitology. 108:147-152 |
| ISSN: | 1469-8161 0031-1820 |
| DOI: | 10.1017/s0031182000068232 |
| Popis: | SUMMARYSmall subunit ribosomal RNA (srRNA) genes of three Theileria species, one Cytauxzoon and four Babesia species were amplified using the polymerase chain reaction (PCR), cloned and sequenced. Our sequences were aligned with srRNA sequences previously published for eight species of Apicomplexa, one ciliate and one dinoflagellate, the last two being included as free-living outgroup species. Phylogenetic relationships between the organisms were inferred by four in-dependent methods of phylogenetic tree construction using the ciliate Oxytricha nova to root the trees. Our trees fail to show a consensus branching order. They do, however, clearly indicate that the theilerias form a monophyletic taxon derived from a paraphyletic group which includes the species B. equi, C. felis and B. rodhaini. The distance trees indicate that the babesias sensu stricto (B. canis, B. caballi, B. bigemina and B. bovis) form another monophyletic taxon which diverged before the theilerias separated from the above-mentioned paraphyletic group. The parsimony and maximum likelihood trees suggest that the babesias and theilerias are sister taxa, both of which were derived from the paraphyletic group. |
| Databáze: | OpenAIRE |
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