PMID: 9550222Apr 29, 1998Paper

Relative merits of nuclear ribosomal internal transcribed spacers and mitochondrial CO1 and ND1 genes for distinguishing among Echinostoma species (Trematoda)

Parasitology
J A Morgan, D Blair

Abstract

Cryptic species, belonging to the 37 collar-spine Echinostoma group, were distinguished using nuclear rDNA ITS (884 bases) and mtDNA CO1 (257 bases) and ND1 (530 bases) sequences. Sequences were obtained from five 37 collar-spine species, Echinostoma trivolvis, E. paraensei, E. caproni, E. revolutum and E. sp.I, a parthenogenetic isolate from Africa. Three geographic isolates of E. caproni were compared. Average sequence divergence among the 37 collar-spine species range from 2.2% in the rDNA ITS through 8% for the CO1 and 14% for the ND1. In addition, genes were sequenced from 2 non 37 collar-spine species, E. hortense and an undescribed Australian species, E. sp. (Aus). For each gene, distances of terminals from a predicted ancestral sequence were calculated. These indicated that ND1 is diverging significantly faster than the other 2 regions. In the CO1 gene most substitutions are synonymous and saturation has been reached for the majority of pairwise comparisons. The ND1 gene exhibits greater pairwise divergence but less evidence of saturation due to weaker conservation of first and second codon positions. The ITS has no amino acid coding constraints and displays no evidence of saturation. Although all 3 regions successfully...Continue Reading

Citations

Sep 10, 2005·Parasitology Research·Jairo PinheiroReinalda Marisa Lanfredi
Mar 31, 2004·Molecular and Cellular Probes·Kate S HutsonRobin B Gasser
Apr 29, 1998·International Journal for Parasitology·J A Morgan, D Blair
Mar 25, 2000·International Journal for Parasitology·J E Feagin
Aug 22, 2012·Parasitology·Rocío CallejónCristina Cutillas
Nov 7, 2001·The Journal of Parasitology·J K WilliamsR Poulin
Jun 2, 2007·The Journal of Parasitology·Lindsey L Stillson, Thomas R Platt
Oct 10, 2003·The Journal of Parasitology·A MaldonadoR M Lanfredi
Jun 15, 2012·The Journal of Parasitology·Jillian T DetwilerLisa K Belden
Jan 1, 2008·The Journal of Parasitology·David M ReinitzRebecca A Cole
Jan 13, 2010·Molecular Phylogenetics and Evolution·Jillian T DetwilerDennis J Minchella
May 12, 2004·Veterinary Parasitology·Jairo PinheiroReinalda Marisa Lanfredi
Jul 25, 2015·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·Mitsuru NagatakiWeerachai Saijuntha
Jun 14, 2015·Infection, Genetics and Evolution : Journal of Molecular Epidemiology and Evolutionary Genetics in Infectious Diseases·R CallejónC Cutillas
May 9, 2006·The Journal of Veterinary Medical Science·Hiroshi Sato, Kazuo Suzuki

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