Abstract
Microsatellite DNA is among the several molecular tools used for determining genetic variability and inbreeding depression in threatened populations. It has been used extensively for population genetics studies in conservation of crocodilians. Even though single nucleotide polymorphisms have higher precision compared to microsatellite DNA markers, microsatellites offer a cost advantage which is particularly important to researchers in the global south. Here, we review the role of microsatellite DNA as a conservation tool in crocodilians. Employing appropriate keywords in three online databases, we studied 78 publications, where microsatellite DNA had been used to study crocodilian species. We found that 504 species-specific markers were designed for 13, out of a total of 24 crocodilian taxa. Genus Crocodylus had the highest number of species-specific markers and was the most studied taxa using microsatellites. Moreover, microsatellite markers developed for C. porosus were successful in cross amplification of microsatellite markers in 19 other crocodilian species. Microsatellite based studies had highest focus on analyses of multiple populations of a single species. Based on our review of microsatellite based studies on populations of crocodilian species, we recommend that microsatellite DNA markers are an effective conservation tool that can provide critical information on population structures of threatened crocodilian species.
Published Version
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