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Variabilidad genética de la tortuga del Río Magdalena, Podocnemis lewyana (duméril, 1852), en la depresión momposina, Colombia

Variabilidad genética de la tortuga del Río Magdalena, Podocnemis lewyana (duméril, 1852), en la depresión momposina, Colombia

Authors :
Adriana Restrepo
Brian C. Bock
Vivian P. Páez
Source :
Actualidades Biológicas. 30:1-9
Publication Year :
2010
Publisher :
Universidad de Antioquia, 2010.

Abstract

Two populations of the endangered Magdalena River turtle, Podocnemis lewyana, separated by 55 km in the Mom-pos Depression were sampled to quantify levels of genetic variation and inspect for evidence of genetic structure. Allozyme analyses resolved 22 presumptive gene loci, but only one resulted polymorphic. Genotype proportions at this locus departed from those expected under Hardy-Weinberg equilibrium, showing heterozygote deficiencies in both populations. However, allele frequencies at the locus did not differ between the two sites. The level of genetic variability documented is one of the lowest yet reported for a turtle species, and may reflect either a historical or recent bottleneck event. The lack of evidence for genetic structure suggests gene flow among the sites, at least historically, but the heterozygote deficiencies at each site also imply that inbreeding may be occurring presently within each deme.

Details

ISSN :
21457166 and 03043584
Volume :
30
Database :
OpenAIRE
Journal :
Actualidades Biológicas
Accession number :
edsair.doi...........a66d326d66fcd1976fb8712f34bd4c6c
Full Text :
https://doi.org/10.17533/udea.acbi.4741