Comprehensive study of mtDNA among Southwest Asian dogs contradicts independent domestication of wolf, but implies dog–wolf hybridization
2011 (English)In: Ecology and Evolution, ISSN 2045-7758, Vol. 1, no 3, 373-385 p.Article in journal (Refereed) Published
Studies of mitochondrial DNA (mtDNA) diversity indicate explicitly that dogs were domesticated, probably exclusively, in southern East Asia. However, Southwest Asia (SwAsia) has had poor representation and geographical coverage in these studies. Other studies based on archaeological and genome-wide SNP data have suggested an origin of dogs in SwAsia. Hence, it has been suspected that mtDNA evidence for this scenario may have remained undetected. In the first comprehensive investigation of genetic diversity among SwAsian dogs, we analyzed 582 bp of mtDNA for 345 indigenous dogs from across SwAsia, and compared with 1556 dogs across the Old World. We show that 97.4% of SwAsian dogs carry haplotypes belonging to a universal mtDNA gene pool, but that only a subset of this pool, five of the 10 principal haplogroups, is represented in SwAsia. A high frequency of haplogroup B, potentially signifying a local origin, was not paralleled with the high genetic diversity expected for a center of origin. Meanwhile, 2.6% of the SwAsian dogs carried the rare non-universal haplogroup d2. Thus, mtDNA data give no indication that dogs originated in SwAsia through independent domestication of wolf, but dog–wolf hybridization may have formed the local haplogroup d2 within this region. Southern East Asia remains the only region with virtually full extent of genetic variation, strongly indicating it to be the primary and probably sole center of wolf domestication. An origin of dogs in southern East Asia may have been overlooked by other studies due to a substantial lack of samples from this region.
Place, publisher, year, edition, pages
2011. Vol. 1, no 3, 373-385 p.
Canis familiaris, domestication, fertile crescent, hybridization, mitochondrial DNA
IdentifiersURN: urn:nbn:se:kth:diva-49714DOI: 10.1002/ece3.35ISI: 000312441000009OAI: oai:DiVA.org:kth-49714DiVA: diva2:460203
FunderScience for Life Laboratory - a national resource center for high-throughput molecular bioscienceSwedish Research CouncilKnut and Alice Wallenberg Foundation
QC 201111302011-11-292011-11-292013-12-12Bibliographically approved