www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

US EUROPE AFRICA ASIA 中文
China / Society

Dogs 'first domesticated in China'

By CHENG YINGQI (China Daily) Updated: 2016-04-27 02:27

Dogs 'first domesticated in China'

Chinese scientists are disputing research that concludes that domesticated dogs evolved 15,000 years ago in Central Asia.

They are arguing that genetic evidence indicates they most likely were first tamed much earlier in southern China.

A research team led by Zhang Yaping from Kunming Institute of Zoology in Yunnan province has questioned the results of previous research, described as the "largest-ever survey of worldwide canine genetic diversity", after reanalyzing the data.

The team's conclusion was published this month as a letter by the Proceedings of the National Academy of Sciences, a top US-based research journal, and previously by Cell Research, a Chinese Academy of Sciences' publication.

Wang Guodong, an associate professor from the academy's Zoology Institute, said, "For the first time, our study unravels an extraordinary journey that the domestic dog has traveled on Earth."

The Chinese research disagrees with conclusions reached in October by a team of scientists led by Adam Boyko of Cornell University in the United States.

The Cornell research, which analyzed more than 185,800 genetic markers for 4,600 purebred dogs from 165 breeds, along with more than 540 village dogs from 38 countries, concluded that the earliest dogs appeared in Central Asia 15,000 years ago.

Wang said: "First, the definition of Central Asia in the previous research is wrong, because they assigned Mongolia and Nepal to Central Asia. Second, despite its large scale, the research did not include data on dog populations from southern China, which has always been believed to be an important place of origin for domesticated dogs."

Wang also sequenced the genome of indigenous dogs living in the Chinese countryside and compared the data with that of the Cornell research, finding that Chinese dogs existed much earlier.

The team also sequenced 12 gray wolves — the modern dog's ancestor — 27 primitive dogs from Asia and Africa and 19 diverse breeds from across the world.

The scientists said Chinese dogs have significantly more genetic diversity than other populations, and are genetically the closest to gray wolves, indicating that dogs were domesticated in southern East Asia about 33,000 years ago.

Peng Minsheng, an associate professor at the institute who specializes in human and animal genetics, said the origin of dogs, the first domesticated animals, is a significant indicator in anthropological studies.

"Since dogs and humans became friends, dogs have migrated with humans either as watchdogs in agricultural civilizations or as herding dogs for nomads. So the migration path of dogs could reflect that of ancient humans and provide us with evidence for tribes that did not have written records," Peng said.

Highlights
Hot Topics
...
主站蜘蛛池模板: 国产成人福利夜色影视 | 精品无人区一区二区三区a 精品午夜国产在线观看不卡 | a毛片视频免费观看影院 | 99精品视频免费在线观看 | 国产9191精品免费观看 | 国产一区二区三区在线观看影院 | 久久精品无遮挡一级毛片 | 国产做爰一区二区 | www操操操| 欧美大片无尺码在线观看 | 亚洲国产日韩女人aaaaaa毛片在线 | 99精品观看 | 国产短裙黑色丝袜在线观看下 | 男女视频免费网站 | 日本精品99 | 国产大乳喷奶水在线看 | 亚洲天堂成人在线观看 | 99在线小视频 | 免费一级做a爰片久久毛片 免费一级做a爰片性色毛片 | a免费毛片在线播放 | 欧美一级片毛片 | 在线精品免费观看综合 | 亚洲免费观看视频 | 免费一级在线 | 欧美日韩一区二区三区视频 | 精品九九在线 | 女人张开腿男人猛桶视频 | 香港全黄一级毛片在线播放 | 性生i活一级一片 | a毛片全部播放免费视频完整18 | 亚洲成a人片在线播放 | 日本妞xxxxxxxxx69 | 91免费视| 老太婆性杂交毛片 | 国内自拍视频在线看免费观看 | 欧美日产国产亚洲综合图区一 | 91精品91 | 久久视频精品36线视频在线观看 | 九九在线精品 | 毛片免费视频网站 | 色综合久久一本首久久 |