Pre-Columbian origins of Native American dog breeds, with only limited replacement by European dogs, confirmed by mtDNA analysis

• Tipo: Artigo em Revista Científica Internacional
• Data: 2013

Autores

Barbara van Asch (Autor) Outra; Ai bing Zhang (Autor) Outra; Mattias C R Oskarsson (Autor) Outra; Cornelya F C Klutsch (Autor) Outra; Antonio Amorim (Autor) FCUP; Peter Savolainen (Autor) Outra

Revista

Título: Proceedings of the Royal Society B: Biological Sciences

Vol. 280

Páginas: 20131142-20131142

ISSN: 0962-8452

Editora: The Royal Society

Indexação

ISI Web of Knowledge - 43 Citações

Scopus - 0 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Ciências biológicas

Outras Informações

ID Authenticus: P-006-7C1

DOI: 10.1098/rspb.2013.1142

Abstract (EN): Dogs were present in pre-Columbian America, presumably brought by early human migrants from Asia. Studies of free-ranging village/street dogs have indicated almost total replacement of these original dogs by European dogs, but the extent to which Arctic, North and South American breeds are descendants of the original population remains to be assessed. Using a comprehensive phylogeographic analysis, we traced the origin of the mitochondrial DNA lineages for Inuit, Eskimo and Greenland dogs, Alaskan Malamute, Chihuahua, xoloitzcuintli and perro sin pelo del Peru, by comparing to extensive samples of East Asian (n = 984) and European dogs (n = 639), and previously published pre-Columbian sequences. Evidence for a pre-Columbian origin was found for all these breeds, except Alaskan Malamute for which results were ambigous. No European influence was indicated for the Arctic breeds Inuit, Eskimo and Greenland dog, and North/South American breeds had at most 30% European female lineages, suggesting marginal replacement by European dogs. Genetic continuity through time was shown by the sharing of a unique haplotype between the Mexican breed Chihuahua and ancient Mexican samples. We also analysed free-ranging dogs, confirming limited pre-Columbian ancestry overall, but also identifying pockets of remaining populations with high proportion of indigenous ancestry, and we provide the first DNA-based evidence that the Carolina dog, a free-ranging population in the USA, may have an ancient Asian origin.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9