RESUMEN

Heterozygosity at eight nuclear enzymatic loci and mitochondrial DNA control region (D-loop) sequence polymorphism was compared between North and South American nine-banded armadillos (Dasypus novemcinctus: Xenarthra, Dasypodidae). All markers revealed a striking genetic homogeneity amongst Texas, Louisiana, and Mississippi individuals, vs. the usual level of polymorphism for the French Guiana population. This may reflect a founder effect during colonization of North America. Occurrence of polymorphism in the D-loop microsatellite motif of North American armadillos suggests a recent recovery of mitochondrial variability. Phylogeographic analyses using Dasypus kappleri as outgroup provides evidence for a clear separation between North and South American control region haplotypes.

Asunto(s)

Armadillos/clasificación , Armadillos/genética , ADN Mitocondrial/genética , ADN/genética , Efecto Fundador , Filogenia , Polimorfismo Genético , Animales , Núcleo Celular , Enzimas/genética , Evolución Molecular , Guyana Francesa , Funciones de Verosimilitud , Región de Control de Posición , América del Norte , América del Sur , Estados Unidos