Big dog, little dog: one mutation explains range of canine sizes
Ancient dogs, domesticated from wolves in the past 30,000 years, differed in size to some extent. But the current extreme size differences — the largest breeds are up to 40 times bigger than the smallest — emerged in the past 200 years, as humans established modern breeds.
The researchers identified two versions, or alleles, of the variant. Across all breeds, dogs with two copies of one allele tended to weigh less than 15 kilograms, whereas two copies of the other version were more common in dogs weighing more than 25 kilograms. Dogs with one copy of each allele tended to be intermediate in size, says Ostrander.
It’s not clear when the large-bodied allele evolved. The researchers found that an ancient wolf that lived in Siberia around 53,000 years ago carried one copy of this version. Other ancient wolves and modern grey wolves tend to have two, suggesting that the large-bodied allele might have been beneficial to wolves.
Indonesia Berita Terbaru, Indonesia Berita utama
Similar News:Anda juga dapat membaca berita serupa dengan ini yang kami kumpulkan dari sumber berita lain.
The Push for Ad Agencies to Ditch Big Oil ClientsAn activist coalition is pressuring firms to stop promoting fossil fuel companies—some of which have advertised oil and gas as “climate friendly.”
Baca lebih lajut »
Latest snowstorm forecast predicts 8 to 12 inches of snow across eastern counties, big cutoffForecasters say the nor'easter is likely to intensify into a powerful 'bomb cyclone,' but many details remain uncertain.
Baca lebih lajut »
Decision looms for start of big downtown San Jose tech campusA development alliance is readying a decision about when — or whether — to launch construction of a huge tech campus that’s proposed for downtown San Jose.
Baca lebih lajut »
Lawyer For Big Oil Tells Court That Lawsuits Threaten National SecurityAn attorney for Big Oil told a federal appeals court this week that suits against oil companies are a security threat to the US.
Baca lebih lajut »
Highlighted by Texas-Alabama, next season’s Big 12 non-conference slate provides plenty of intrigueExpect to hear a lot about the 2010 BCS title game next season. Texas will be hosting Alabama, with the two bluebloods meeting for the first since the...
Baca lebih lajut »
NYC’s First Electric School Buses Are Diesel-to-Electric Repowers, & That’s a Big DealNew York City has committed to going all electric with its school buses by 2035. The first electric school buses are hitting the city’s streets now, and they are pioneering a new model for transitioning their fleet.
Baca lebih lajut »