Hydrographic network structure and population genetic differentiation in a vector of fasciolosis,Galba truncatula |
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| Authors: | S. Hurtrez-Boussès J.-E. Hurtrez H. Turpin C. Durand P. Durand T. De Meeüs C. Meunier F. Renaud |
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| Affiliation: | 1. Department of Nursing, College of Medicine and Health Science, University of Gondar, Gondar, Ethiopia;2. Department of Epidemiology and Biostatistics, Institute of Public Health, University of Gondar, Ethiopia;3. College of Medicine and Health Sciences, School of Biomedical and Laboratory Sciences, Unit of Quality Assurance and Laboratory Management, University of Gondar, Gondar, Ethiopia;4. Department of Emergency Medicine, The Ohio State University''s Wexner Medical Center, Columbus, OH, USA;1. Mivegec UMR UM, CNRS 5290 – IRD 224 Maladies Infectieuses et Vecteurs: Ecologie, Génétique, Evolution et Contrôle, Centre IRD, BP 64501, 34394 Montpellier Cedex 5, France;2. IRD, UMR Interactions hôtes - vecteurs - parasites dans les infections par des trypanosomatidae - (Intertryp) UMR IRD 177, CIRAD 17, TA A-17/G, Campus International de Baillarguet, 34398 Montpellier Cedex 5, France;3. Inserm 1094, Facultés de Médecine et de Pharmacie, Limoges, 2 Rue du Docteur Raymond Marcland, 87025 Limoges, France;4. Département de Biologie–Ecologie, Faculté des Sciences, Université Montpellier, 34095 Montpellier Cedex 5, France;1. Developmental Tumor Biology Laboratory, Hospital Sant Joan de Déu, Fundació Sant Joan de Déu, Barcelona, Spain;2. Institut d'' Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain;3. Department of Anatomic Pathology, Pharmacology and Microbiology, University of Barcelona, Barcelona, Spain |
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| Abstract: | We report a preliminary analysis on the relationships between drainage basin structure and genetic structure of populations of the European vector of fasciolosis, Galba truncatula. In the study area, 251 snails belonging to 12 populations were collected along different ditches of a same river network. Each snail was genotyped at six variable microsatellite loci. Our results show that all sample sites are characterized by a low level of polymorphism and a very high and significant heterozygote deficiency. Our data reveal a significant genetic differentiation, even at a small scale, and failed to delimit clear patterns of isolation by euclidian distance. Our study shows that genetic differentiation significantly increases with hydrographic distance along the streams (p < 0.002), in consistence with the hypothesis that dispersion along the stream is dependent on the direction of water flow. This study shows that relationships can exist between the organization of the hydrological network and population biology of a disease vector, which has strong potential applications to drainage network management issues. |
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