久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

Society

Scientist on mission to clone endangered pandas

By He Dan (China Daily)
Updated: 2010-08-11 08:09
Large Medium Small

BEIJING - China has been exploring every possible means of saving giant pandas, one of the world's most endangered species, from becoming extinct, even if it means resorting to cloning them.

Chen Dayuan, a senior scientist who specializes in cloning at the institute of zoology in the Chinese Academy of Sciences, introduced the idea of performing cloning techniques on giant pandas in 1998.

Scientist on mission to clone endangered pandas
Giant panda Gege tends to her new female cub on Monday, following six hours of labor at the China Panda Preservation Research Center in Wolong, Sichuan province. [PROVIDED TO CHINA DAILY]

Using initial funding of 100,000 yuan ($14,780), Chen successfully produced blastocysts by transplanting the somatic nucleus from sample pandas into the enucleated egg cells of rabbits, the Beijing Morning Post reported on Thursday.

The move was reported as one of the 10 biggest achievements of science and technology in 1999. It won an award of 6 million yuan and further funding of 5 million yuan for the project from the Ministry of Science and Technology.

According to the report, two embryos were created from a surrogate mother cat who became pregnant after being injected with a blastocyst, but the experiment was abandoned after the cat died of pneumonia.

Chen and his team then experimented with surrogacy on black bears. After three years of effort, a black bear became pregnant and the shape of a fetus could be seen on an ultrasound scan.

However, the research was allegedly suspended in 2005 because the fetus did not completely develop before the project deadline.

"Those opposed to cloning have made their voices heard throughout the research project on cloning giant pandas. Some people find cloning goes against nature, but it is actually a pioneering technology. If successful, it is a way to save endangered animals," Chen was quoted as saying in the report.

"While I agree that research on cloning is significant, it is inappropriate to use giant pandas in this type of experiment. The number of pandas is limited and human beings have yet to master knowledge about pandas' pregnancy," said Wang Dajun, a researcher at the school of life sciences, Peking University.

Related readings:
Scientist on mission to clone endangered pandas Scientists clone five human embryos
Scientist on mission to clone endangered pandas Scientists clone frozen mice, aim for mammoths
Scientist on mission to clone endangered pandas S. Korean firm offers to clone dogs
Scientist on mission to clone endangered pandas Australia issues first license to clone human embryos

Based on statistics from the State Forestry Administration, 1,590 giant pandas live in the wild in China, while 210 of them have been bred in captivity.

There are two problems with captive breeding. Pandas in captivity are unable to survive in the wild and it becomes increasingly difficult to find suitable natural habitats for them, Wang said.

"Too much human intervention has caused problems for giant pandas. The most important thing is that we should protect pandas' natural habitats. Cloning would do little to save the endangered species," Wang added.

In response, Chen said that he was used to criticism and vowed to continue his research.

Zhao Yanrong contributed to the story.

久久久无码人妻精品无码_6080YYY午夜理论片中无码_性无码专区_无码人妻品一区二区三区精99

    国产超碰在线一区| 风间由美一区二区av101| 91麻豆精品91久久久久同性| 日本在线不卡一区| 2023国产一二三区日本精品2022| 国产精品99久久久久久宅男| 国产精品美女久久久久久久久| 91亚洲国产成人精品一区二区三| 亚洲午夜久久久久久久久电影院 | 亚洲日本乱码在线观看| 欧美日韩一区在线| 精品一区二区三区免费观看| 中文欧美字幕免费| 欧美午夜片在线看| 久久99国产精品尤物| 国产精品毛片无遮挡高清| 欧美性猛交xxxx黑人交| 在线观看av一区二区| 亚洲午夜视频在线| 久久综合九色综合97婷婷| 成人av综合在线| 日韩和欧美一区二区| 久久久亚洲精品石原莉奈 | 91精品国产综合久久久蜜臀图片| 激情欧美一区二区| 亚洲女人小视频在线观看| 91精品国产福利在线观看| 国产91高潮流白浆在线麻豆| 亚洲国产中文字幕| 国产午夜精品理论片a级大结局| 91精品办公室少妇高潮对白| 久久国产欧美日韩精品| 亚洲欧美另类小说| 精品福利二区三区| 在线观看免费成人| 国产一区二区三区在线观看免费| 夜夜嗨av一区二区三区中文字幕 | 丰满岳乱妇一区二区三区| 亚洲sss视频在线视频| 国产欧美一区二区精品忘忧草| 欧美日韩激情一区二区三区| 丁香婷婷综合网| 奇米影视7777精品一区二区| 亚洲丝袜自拍清纯另类| 久久综合九色综合97婷婷| 欧美日韩亚洲综合在线 | 亚洲女女做受ⅹxx高潮| 久久久久久久久蜜桃| 欧美日韩情趣电影| 成人aaaa免费全部观看| 另类小说图片综合网| 亚洲亚洲精品在线观看| 国产精品理伦片| 精品99久久久久久| 欧美日韩一级片在线观看| 99久久国产综合精品色伊| 韩国欧美国产1区| 午夜久久电影网| 亚洲视频小说图片| 久久久精品影视| 日韩视频免费观看高清完整版| 91国偷自产一区二区使用方法| 国产成a人无v码亚洲福利| 看电视剧不卡顿的网站| 亚洲国产视频网站| 亚洲男人天堂一区| 中文字幕国产一区| 久久在线观看免费| 欧美一区二区三区日韩视频| 欧美最猛黑人xxxxx猛交| 成人精品一区二区三区四区| 国产在线国偷精品免费看| 日本美女视频一区二区| 亚洲午夜三级在线| 亚洲最大色网站| 日韩一区在线看| 国产精品色眯眯| 久久精品夜色噜噜亚洲a∨| 亚洲精品一线二线三线| 日韩免费一区二区| 日韩午夜电影在线观看| 在线观看91av| 欧美精选一区二区| 欧美日韩国产三级| 欧美日韩一区久久| 欧美日韩激情一区| 欧美欧美午夜aⅴ在线观看| 欧美日韩一区视频| 欧美日韩国产综合草草| 欧美日韩国产大片| 欧美日韩国产美女| 欧美精品久久久久久久多人混战| 欧美视频在线一区二区三区| 在线区一区二视频| 欧美在线短视频| 欧美日韩你懂的| 欧美伦理电影网| 欧美日韩国产免费一区二区| 欧美久久高跟鞋激| 欧美一区二区三区四区久久| 日韩欧美视频在线| 精品国产人成亚洲区| 久久综合色8888| 国产亚洲一本大道中文在线| 国产欧美日韩麻豆91| 国产精品久久毛片| 亚洲另类在线视频| 亚洲成人午夜电影| 日韩黄色小视频| 久久99精品久久久| 国产精品小仙女| 99re视频这里只有精品| 99久久久久久99| 在线观看亚洲精品视频| 欧美午夜电影在线播放| 7777女厕盗摄久久久| 日韩午夜在线观看视频| 久久久久久电影| 国产精品久久三区| 亚洲在线一区二区三区| 丝袜美腿亚洲色图| 久久er99热精品一区二区| 国产精品夜夜嗨| 99久久精品免费| 欧美系列亚洲系列| 欧美成人a在线| 亚洲国产成人在线| 亚洲精品乱码久久久久久久久| 亚洲成av人片在线| 激情综合网av| 99久久精品一区二区| 精品1区2区3区| 亚洲精品一区二区三区蜜桃下载| 欧美激情在线免费观看| 一区二区三区在线看| 日韩av电影天堂| 国产成人在线影院| 色哦色哦哦色天天综合| 欧美一区二区视频网站| 欧美国产日本韩| 亚洲午夜久久久久久久久电影院| 美女久久久精品| 成人黄色777网| 精品视频一区三区九区| 久久在线免费观看| 亚洲精品免费一二三区| 久久精品国产网站| 97se亚洲国产综合自在线不卡| 欧美日韩久久不卡| 欧美激情在线看| 天天射综合影视| 成人免费毛片a| 在线综合视频播放| 国产精品美女久久久久久久 | 精品1区2区3区| 久久精品人人做人人爽97| 一二三区精品福利视频| 国精产品一区一区三区mba视频| 91农村精品一区二区在线| 日韩欧美中文一区二区| 成人欧美一区二区三区白人| 青娱乐精品在线视频| 成人app下载| 欧美成人一区二区| 一个色综合网站| 国产99久久久精品| 欧美一区二区三区在线看| 一区精品在线播放| 久久成人久久鬼色| 欧美在线一区二区三区| 国产日韩欧美综合在线| 丝瓜av网站精品一区二区| 成人免费av资源| 日韩亚洲欧美成人一区| 一区二区在线看| 国产成人8x视频一区二区 | 欧美一区二区播放| 亚洲男女一区二区三区| 国内精品视频一区二区三区八戒| 欧美三级蜜桃2在线观看| 国产精品美日韩| 精品一区二区三区视频| 欧美日韩国产免费一区二区| 国产精品福利影院| 国产在线播放一区三区四| 欧美日韩国产乱码电影| 亚洲视频小说图片| 国产高清精品久久久久| 日韩亚洲欧美综合| 亚洲自拍另类综合| 成人av电影在线| 国产日韩欧美制服另类| 久久99精品久久久久婷婷| 欧美久久久影院| 夜夜揉揉日日人人青青一国产精品| 成人美女视频在线观看| 国产亚洲美州欧州综合国| 久久精品国产一区二区| 欧美日韩国产免费| 亚洲一区二区三区视频在线|