Phylogeny and sequence variability of the Sarcocystis singaporensis Zaman and Colley, (1975) 1976 ssrDNA.
Parasitol Res
; 88(9): 810-5, 2002 Sep.
Article
em En
| MEDLINE
| ID: mdl-12172812
ABSTRACT
The coccidium Sarcocystis singaporensis (Apicomplexa Sarcocystidae) is a cyst-forming parasite with potential as a biological agent for the control of wild populations of rodents in non-native environments. Phylogenetic analysis based on the ssrDNA supports S. singaporensisisolates as a sister species to sarcosporidians transmitted between snakes and rodents but an association with the carnivore-ruminant Sarcocystis spp. could not be rejected by likelihood ratio tests. Four complete and six partial ssrDNA sequences representing this species are monophyletic in any tree reconstruction method; however, they possess very high pairwise distances of up to 0.053. The obtained sequences suggest the probable existence of at least two divergent paralogous ssrDNAs. Moreover, our results support the co-evolution of lsrDNA and ssrDNA in S. singaporensis. The utility of coccidian lsrDNA and ssrDNA for evolutionary studies and their abundance in the primary nucleotide databases is discussed.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Filogenia
/
Variação Genética
/
DNA Ribossômico
/
DNA de Cadeia Simples
/
Sarcocystis
Limite:
Animals
Idioma:
En
Revista:
Parasitol Res
Assunto da revista:
PARASITOLOGIA
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
República Tcheca