Geographic Patterns of Mitochondrial-DNA Variation in Collared Peccaries

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Abstract
We investigated variation in mitochondrial DNA (mtDNA) of 84 collared peccaries (Tayas-su tajacu) from Arizona and four peccaries from Texas using 12 restriction enzymes to determine the geographic pattern of variation in this social, relatively recent immigrant to Arizona. Three mtDNA haplotypes were present in the sample from Arizona, and sequence divergence estimates among these ranged from 0.2 to 0.8%. The frequencies of these three haplotypes differed significantly across geographic regions, indicating some partitioning of mtDNA haplotypes. Analysis of these data suggests that Arizona was colonized by at least three mtDNA lineages, most likely originating in Mexico. We hypothesize that founding events at the edge of the peccary's expanding range led to the initial partitioning of haplotypes observed in samples from Arizona.

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