Evolution of dog breeds: now assigned.
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Evolution of dog breeds: now assigned.
From the 80 kilograms great dane to the 1 kilogram small poodle cup of tea, it seems there is a dog for everyone. Now, the largest genetic analysis to date has discovered the way those breeds came to be, which ones are really closely related, and what makes some dogs more susceptible to certain diseases.
They show that by using genetics, they can actually show what was happening as breeders were making these breeds, Elinor Karlsson, a computational biologist at the University of Massachusetts Medical Center in Worcester, who did not participate with the work.
After dogs were probably domesticated initially between 15,000 and 30,000 years ago, people collected the best hunters, house guards, and breeding animals to be their best friends, depending on their needs. There were dogs for war and to embrace, for skin and flesh, and for being good companions. Dogs today come in approximately 350 breeds, each with specific traits and behaviors. Many emerged in the last 200 years. Some studies have defined the genetics of a relatively small number of races, but none have been broad enough to show how and when the majority came into being. The entire period in the middle domestication and today has been a black box.
Elaine Ostrander and Heidi Parker, geneticists at the National Human Genome Research Institute in Bethesda, Maryland, and colleagues spent 20 years going to canine exhibitions, writing breeders, and receiving help from all corners of the world to collect samples of DNA; In some cases are used already collected data. They were not interested in determining how and when dogs were domesticated, but how all races developed. His sample now includes 1346 dogs representing 161 breeds, or not quite half of all types of dogs. By comparing the differences in 150,000 locations in the genome of each dog, a family tree was constructed. "The scope of the analysis is very impressive, a tour of strength on the evolution of race, evolutionary biologist Robert Wayne of the University of California, Los Angeles, who was not involved with the work.
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