Wish I could remember. There was a timeline for domestication of varieus animals in a Nat Geo Magazine this last year. As I expected, dogs were fairly early and cats were fairly late, but I didn't think cows were later than cats.
I've been trying to see if Nat Geo's website has a subject search so I can find some of these articles, but I'm having trouble getting in. If i find anything, I'll post it here.
I'm all for the Bering straight theory. Look at the ssimilarities between the sled dog breeds, the Japanese Shiba and Akita, the Chinese Chow, and other Asian breeds. They all look like they have a common ancestor.
Believe the domestication of dogs occurred along time ago during the time of hunters and gatherers. Early man saw the benefit of having this ally along on hunts to help locate or take down game. For how they arrived to the Americas, more than likely the same thing with the Bering Strait landbridge during the time before the ice age.
Early dogs probably also served to help in protection as when large groups of early man settled in a location for a bit, wolves and other predators more than likely tried to come into the camp only to have the dogs warn the humans of the approaching danger.
(06-11-2012, 02:21 PM)Ram Wrote: If the domesticated dogs were originated in Asia, when and how did they spread to the rest of the world?
I don't mind to hear some more details.
Quote:A 2002 study by Peter Savolainen et al. identified mitochondrial DNA evidence suggesting a common origin from a single East Asian gene pool for all dog populations. In 2010, a study by Bridgett vonHoldt et al., using a larger data set of nuclear markers, pointed to the Middle East as the source of most of the genetic diversity in the domestic dog and a more likely origin of domestication events. Z-L Ding et al. (2011) presented new Y-chromosome data from 151 dogs sampled worldwide, again pointing to a single domestication region south of the Yangtze river. Source
Unfortunately even with the multiple studies of the origins of the dog, no one can definitely say where. They all rely on archaeological findings and genetics.
Two studies have already mentioned that the domestication started near the Yangtze River. One of which was the 2009 study by the Kunming Institute stating that dogs were domesticated from wolves tamed less than 16,300 years ago and the other is mentioned above.