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Temporal genetic variation of Fasciola hepatica from sheep in Galicia (NW Spain)

dc.contributor.authorVázquez-Prieto S.
dc.contributor.authorVilas R.
dc.contributor.authorUbeira F.M.
dc.contributor.authorPaniagua E.
dc.date.accessioned2020-09-02T22:30:31Z
dc.date.available2020-09-02T22:30:31Z
dc.date.issued2015
dc.identifier10.1016/j.vetpar.2015.02.032
dc.identifier.citation209, 3-4, 268-272
dc.identifier.issn03044017
dc.identifier.urihttps://hdl.handle.net/20.500.12728/6624
dc.descriptionWe found low genetic differentiation between two temporal samples of Fasciola hepatica (2006 and 2008) collected from nine sheep of the same flock that shared the same pasture for at least 2 years. However, each sample, represented by four and five infrapopulations respectively, showed strong heterozygote deficits regarding Hardy-Weinberg expectations and a high degree of genetic structure at infrapopulation level. This is an unexpected result since genetic drift should increase temporal variation among years. Our findings are most likely explained by the fact that the parasite can survive many years in the definitive host. Temporal gene flow favored by high longevity probably increases levels of genetic variability of the population but could also contribute to the observed heterozygote deficits within temporal samples and infrapopulations if it favors the Wahlund effect. Despite the homogenizing effect of gene flow, the high genetic divergence observed between infrapopulations is most likely a consequence of strong genetic drift associated to the complexity of the life cycle. © 2015 Elsevier B.V.
dc.language.isoen
dc.publisherElsevier
dc.subjectAllozymes
dc.subjectFasciola hepatica
dc.subjectMicrosatellites
dc.subjectPopulation genetic structure
dc.subjectTemporal variation
dc.subjectallele
dc.subjectArticle
dc.subjecteffective population size
dc.subjectFasciola hepatica
dc.subjectfascioliasis
dc.subjectgene flow
dc.subjectgene frequency
dc.subjectgenetic distance
dc.subjectgenetic drift
dc.subjectgenetic variability
dc.subjectheterozygote
dc.subjecthost parasite interaction
dc.subjectlongevity
dc.subjectnonhuman
dc.subjectparasite survival
dc.subjectpopulation genetic structure
dc.subjectsheep
dc.subjectSpain
dc.subjecttime
dc.subjectanimal
dc.subjectFasciola hepatica
dc.subjectfascioliasis
dc.subjectgene expression regulation
dc.subjectgenetics
dc.subjectmetabolism
dc.subjectparasitology
dc.subjectphysiology
dc.subjectSheep Diseases
dc.subjectveterinary
dc.subjectFasciola hepatica
dc.subjectOvis aries
dc.subjecthelminth protein
dc.subjectAnimals
dc.subjectFasciola hepatica
dc.subjectFascioliasis
dc.subjectGene Expression Regulation
dc.subjectGenetic Variation
dc.subjectHelminth Proteins
dc.subjectSheep
dc.subjectSheep Diseases
dc.subjectSpain
dc.subjectTime Factors
dc.titleTemporal genetic variation of Fasciola hepatica from sheep in Galicia (NW Spain)
dc.typeArticle


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