久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

Global EditionASIA 中文雙語Fran?ais
China
Home / China / Innovation

DNA breakthrough helps identify lost WWII heroes

China Daily | Updated: 2019-09-03 09:19
Share
Share - WeChat

SHANGHAI - More than 70 years after he died fighting the Japanese invasion of China, soldier D02324 has his name again - and his family.

The identification of martyr Zou Kaisheng came about after a breakthrough in DNA testing technology at Shanghai's Fudan University.

For Zou's granddaughter, Zhang Jihong, the discovery closed a long chapter of her life during which her mother spent decades searching for the hero, whom Zhang and her mother had never met.

"We'd turned over every stone without success, and then this April we were informed his remains might be buried in Shanxi province," Zhang said.

The family left for a village in Pingyao county, where a tomb contained the bodies of unknown soldiers, and they brought some of the remains back to Shanghai for DNA testing.

After a month studying Zhang's chromosomal profile and a male paternal relative's Y-chromosomal profile, researchers confirmed the remains belonged to her grandfather.

"We were over the moon with the results," Zhang said.

DNA analysis is the only practical method of identifying remains, but current methods rarely obtain useful data from skeletal remains after decades of contamination by microorganisms and inorganic substances, such as metal pollutants from corroded weapons.

But the Fudan University researchers have invented a new and more efficient testing method for identification.

They collected the remains of 572 martyrs at seven battle sites discovered by Chinese government and public organizations from 2015 to 2018.

Research leader Wen Shaoqing said soil microorganisms were the main component of the remains.

Genetic material was degraded severely, making the DNA segments very short.

"Their DNA segment length is just 0.01 percent, or even shorter, of that of living people," Wen said. The shorter the segment is, the fewer identifiable DNA characteristics there will be.

In the study, researchers extracted DNA from bones and teeth using an improved procedure with additional purification to avoid contamination.

They updated the sequencing technology to detect more genes simultaneously with shorter and more precise DNA segments that undergo artificial amplification and contain targeted gene variants.

Wen said the improvements were developed during previous genetic studies of East Asian populations. The new method can detect maternal and paternal lineage, gender and features that distinguish ethnic groups such as those of China, Japan and the Republic of Korea.

The study was published in the Journal of Human Genetics.

Wen and his team have identified 331 unknown Chinese soldiers from World War II and established a national DNA database to help Chinese families find missing relatives.

They are still improving the sequencing technology and calling for more people to donate DNA data.

"The data pool is a beacon illuminating the martyrs' return home," Wen said.

Xinhua

Top
BACK TO THE TOP
English
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
 
主站蜘蛛池模板: 一级特黄特黄毛片欧美的 | 欧美日韩精品一区二区三区高清视频 | 久久国内精品视频 | 日本aaaa精品免费视频 | 91久久99 | u影一族亚洲精品欧美激情 va欧美 | 悠悠影院欧美日韩国产 | 欧美黑寡妇特a级做爰 | www.亚洲在线 | 中文字幕乱码视频32 | 国产盗摄一区二区 | 国产性精品| 亚洲一区二区三区四区五区六区 | 亚洲情a成黄在线观看动 | 亚洲美女性生活视频 | 欧美成人免费网在线观看 | 亚洲黄网址 | a级在线观看 | 手机看片日本 | 超91在线 | 成人做爰在线视频 | 亚洲天堂男人的天堂 | 国产成人综合手机在线播放 | 久久免费高清视频 | 91一级片 | 精品国产高清毛片 | 最爽的乱淫片免费 | 亚洲成人美女 | 久草在线视频免费资源观看 | 国产精品视频一区二区猎奇 | 欧美一区二区三区免费 | 日韩精品一区二区三区中文字幕 | 在线成人精品国产区免费 | 久久受www免费人成看片 | 日本人一级毛片视频 | 私人玩物福利 | 国产色视频在线观看免费 | 日本欧美色 | 日本精品夜色视频一区二区 | 中文字幕日韩欧美一区二区三区 | 亚洲成年人免费网站 |