African origin for Madagascan dogs revealed by mtDNA analysis
(English)Manuscript (preprint) (Other academic)
Dogs were the only domestic animals accompanying humans to every continent in ancient time, and was along with pig and chicken part of the Austronesian Neolithic culture. Madagascar was one of the last major land masses to be occupied by humans, 1,500-2,000 years ago. It was initially colonized by Austronesian speaking Indonesians but subsequent migration from Africa has resulted in approximately equal genetic contribution from Indonesia and Africa, and the material culture has mainly African influences. To track the initial worldwide dispersal of dogs and illuminate this part of Madagascan cultural origins we here investigate the ancestry of Malagasy dogs. We analysed mtDNA control region sequences in dogs from Madagascar (n=145) and compared with dogs from potential ancestral populations in Island Southeast Asia (n=219) and sub-Saharan Africa (n=493). We found that 90% of the Madagascan dogs carried a haplotype present also in sub-Saharan Africa, and the remaining lineages could all be attributed to a likely origin in Africa. In contrast, only 26% of Malagasy dogs shared a haplotype with Indonesian dogs, all of which universally occurring haplotypes, and three haplotypes typical for Austronesian dogs, carried by >50% of Indonesian and Polynesian dogs, were carried by only 1% of the Madagscan dogs. Thus, in contrast to the human population, the Madagscan dogs seem to trace its origin entirely from Africa. This indicates that dogs were not brought with the initial Austronesian speaking colonizers on their trans-ocean voyage but introduced at a later stage with the migration and cultural influence from Africa.
IdentifiersURN: urn:nbn:se:kth:diva-94475OAI: oai:DiVA.org:kth-94475DiVA: diva2:525857
QS 20122012-05-092012-05-092012-05-29Bibliographically approved