Parasite (Schistosoma mansoni) and host (Biomphalaria glabrata) genetic diversity: population structure in a fragmented landscape
| Autor: | V. Barral, J. Langand, C. Sire, André Théron |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Biomphalaria
Population genetics Zoology Host-Parasite Interactions Trees parasitic diseases Genetic variation Prevalence Biomphalaria glabrata Animals Guadeloupe Local adaptation Genetic diversity biology Geography Intermediate host Genetic Variation Schistosoma mansoni biology.organism_classification Random Amplified Polymorphic DNA Technique Rats Infectious Diseases Animal Science and Zoology Parasitology |
| Zdroj: | Parasitology. 122(Pt 5) |
| ISSN: | 0031-1820 |
| Popis: | Random amplified polymorphic DNA (RAPD) markers were used to quantify genetic diversity within and between 5 populations ofSchistosoma mansoniwithin its definitive host (Rattus rattus) and the 5 corresponding populations of the snail intermediate host (Biomphalaria glabrata) from a limited endemic area of murine schistosomiasis on the island of Guadeloupe. Analysis of molecular variance (AMOVA) and canonical correspondence analysis (CCA) were used to test the significance of genetic differentiation between populations. Both methods gave similar results. Of total gene diversity, 15.1% (AMOVA) and 18.8% (CCA) was partitioned between localities forS. mansoniwith an absence of association between genetic and geographical distances. Geographical localities accounted for 20.5% (CCA) of the total diversity forB. glabratapopulations. The genetic distances between pairs of parasite populations were not correlated with the genetic distances between the corresponding pairs of snail host populations. Such strong patterns of local differentiation of both parasite and snail populations are consistent with predictions based on metapopulation dynamics and may have implications on host–parasite susceptibility relationship through local adaptation processes. |
| Databáze: | OpenAIRE |
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