Molecular evolution in hypotrichous ciliates: sequence of the small subunit ribosomal RNA genes from Onychodromus quadricornutus and Oxytricha granulifera (Oxytrichidae, Hypotrichida, Ciliophora).
J Mol Evol
; 32(1): 64-9, 1991 Jan.
Article
em En
| MEDLINE
| ID: mdl-1840617
ABSTRACT
The small subunit ribosomal RNA (16S-like rRNA) coding regions of the hypotrichous ciliates Onychodromus quadricornutus and Oxytricha granulifera were amplified using polymerase chain reaction techniques. Complete sequences were determined for the amplified genes and compared to those of other ciliated protozoa. In phylogenetic trees inferred using distance matrix methods oxytrichids are not seen as a cohesive phylogenetic group. Oxytricha nova is most closely related to Stylonychia pustulata in a lineage that also includes O. quadricornutus. This phylogeny contradicts phylogenetic schemes in which Onychodromus is considered to be a primitive hypotrichous ciliate and suggests that O. nova was misidentified as members of the genus Oxytricha.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
RNA Ribossômico 16S
/
Cilióforos
/
Evolução Biológica
Limite:
Animals
Idioma:
En
Revista:
J Mol Evol
Ano de publicação:
1991
Tipo de documento:
Article