Population genetics of the endangered Colombian turtle Podocnemis lewyana and molecular phylogney of the ancient South American and Malagsy river turtles (Reptilia: Testudines: Podocnemididae)

哥伦比亚大龟lewiyana Podocnemis（世界自然保护联盟濒危物种红色名录；附录II CITES公约）受到栖息地丧失和迫害的威胁。我们的目标是利用多个核微卫星位点和一个快速进化的线粒体标记（控制区）来研究其遗传多样性、基因流和种群的分化，从而设计优先保护种群，使遗传多样性的损失最小化。podocnemiddae家族的分子系统发育podocnemiddae是自白垩纪以来已知的一个古老的龟群。8种有宗教分布（南美洲、马达加斯加）；它们都濒临灭绝。利用mtDNA （12S rRNA, cyt-b）和nDNA序列（cmos），我们的目标是(i)提供第一个完整的分子系统发育，（ii）重新研究动物地理学（包括物种分化时间的估计），以及（iii）测试红足鼠的两种不同形态是否存在遗传差异，这是一个高度保守相关性的问题。

I – Population genetic structure of Podocnemis lewyanaThe large Colombian turtle Podocnemis lewyana (IUCN Red List category “endangered”; Appendix II CITES convention) is threatened by habitat loss and persecution. We aim to investigate its genetic diversity, gene flow, and differentiation of populations throughout the species’ range using multiple nuclear microsatellite loci and a quickly evolving mitochondrial marker (control region) for designing priority populations for conservation that allow minimizing loss of genetic diversity.II – Molecular phylogeny of the family Podocnemididae (Testudines, Reptilia)Podocnemididae is an ancient group of turtles known since the Cretaceous. The eight species have relictual distributions (South America, Madagascar); all are endangered. Using mtDNA (12S rRNA, cyt-b) and nDNA sequences (cmos) we aim to (i) provide the first complete molecular phylogeny, (ii) reinvestigate the zoogeography (including estimation of divergence times of species), and (iii) test whether two distinct morphotypes of Podocnemis erythrocephala differ genetically, a question of high conservational relevance.