Diversity and phylogeny of insect trypanosomatids based on small subunit rRNA genes: polyphyly of Leptomonas and Blastocrithidia.
J Eukaryot Microbiol
; 48(2): 161-9, 2001.
Article
in En
| MEDLINE
| ID: mdl-12095103
ABSTRACT
With the aim of further investigating phylogenetic relationships in insect trypanosomatids, we have determined the sequences of small subunit rRNA genes from ten isolates, which were originally classified as Leptomonas, Blastocrithidia, and Wallaceina based on their morphology in the hosts. The inferred maximum likelihood, parsimony, and distance trees indicate that the Leptomonas and Blastocrithidia are polyphyletic, and confirm the polyphyly of Herpetomonas and Crithidia. Blastocrithidia triatoma and Leptomonas collosoma were among the earliest branching lineages among the insect trypanosomatids, while most other isolates were found within a closely related terminal clade, which also included Crithidia fasciculata. This analysis has clearly demonstrated that the morphological classification system of insect trypanosomatids does not always reflect their genetic affinities warranting its revision in the future.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Phylogeny
/
Genetic Variation
/
Trypanosomatina
/
Genes, rRNA
Limits:
Animals
Language:
En
Journal:
J Eukaryot Microbiol
Journal subject:
MICROBIOLOGIA
/
PARASITOLOGIA
Year:
2001
Document type:
Article
Affiliation country:
RUSSIA