c******i
发帖数: 4091 | 1 http://phys.org/news/2013-01-ancient-dna-reveals-humans-years.h
Ancient DNA reveals humans living 40,000 years ago in Beijing area related
to present-day Asians, Native Americans
January 21, 2013
Ancient DNA reveals humans living 40,000 years ago in Beijing area related
to present-day Asians, Native Americans Enlarge The leg of the early modern
human from Tianyuan Cave was used for the genetic analysis as well as for
carbon dating. Credit: MPI for Evolutionary Anthropology An international
team of researchers including Svante Pääbo and Qiaomei Fu of the
Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany,
sequenced nuclear and mitochondrial DNA that had been extracted from the leg
of an early modern human from Tianyuan Cave near Beijing, China. Analyses
of this individual's DNA showed that the Tianyuan human shared a common
origin with the ancestors of many present-day Asians and Native Americans.
In addition, the researchers found that the proportion of Neanderthal and
Denisovan-DNA in this early modern human is not higher than in people living
in this region nowadays. Humans with morphology similar to present-day
humans appear in the fossil record across Eurasia between 40,000 and 50,000
years ago. The genetic relationships between these early modern humans and
present-day human populations had not yet been established. Qiaomei Fu,
Matthias Meyer and colleagues of the Max Planck Institute for Evolutionary
Anthropology in Leipzig, Germany, extracted nuclear and mitochondrial DNA
from a 40,000 year old leg bone found in 2003 at the Tianyuan Cave site
located outside Beijing. For their study the researchers were using new
techniques that can identify ancient genetic material from an archaeological
find even when large quantities of DNA from soil bacteria are present. The
researchers then reconstructed a genetic profile of the leg's owner. "This
individual lived during an important evolutionary transition when early
modern humans, who shared certain features with earlier forms such as
Neanderthals, were replacing Neanderthals and Denisovans, who later became
extinct", says Svante Pääbo of the Max Planck Institute for
Evolutionary Anthropology, who led the study. Ancient DNA reveals humans
living 40,000 years ago in Beijing area related to present-day Asians,
Native Americans Enlarge Researchers carrying out excavation works at the
Tianyuan Cave from which the leg bones had been excavated in 2003. Credit:
Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), Beijing
The genetic profile reveals that this early modern human was related to the
ancestors of many present-day Asians and Native Americans but had already
diverged genetically from the ancestors of present-day Europeans. In
addition, the Tianyuan individual did not carry a larger proportion of
Neanderthal or Denisovan DNA than present-day people in the region. "More
analyses of additional early modern humans across Eurasia will further
refine our understanding of when and how modern humans spread across Europe
and Asia", says Svante Pääbo. Parts of the work were carried out
in a new laboratory jointly run by the Max Planck Society and the Chinese
Academy of Sciences in Beijing. More information: Qiaomei Fu, Matthias Meyer
, Xing Gao, Udo Stenzel, Hernán A. Burbano, Janet Kelso, Svante Pä&#
228;bo, DNA analysis of an early modern human from Tianyuan Cave, China,
PNAS, Online Early Edition, January 21, 2013. Journal reference: Proceedings
of the National Academy of Sciences search and more info website Provided
by Max Planck Society search and more info
Read more at: http://phys.org/news/2013-01-ancient-dna-reveals-humans-years.html#jCp | b****r
发帖数: 17995 | | S****n
发帖数: 62 | 3 印第安人的Y染色体有三种。如果与印第安人相关，那么Y染色体可能是Q、R、C。而文
中又说与今天的亚洲人相关，那么就排除了R。所以只可能是Q和C。这两种在当今中国
非常稀少。而在北亚较多。正好说明了这个遗址的古人类与当今中国人关系不大，而与
北亚及迁徙到美洲的印第安人祖先关系更近。
http://en.wikipedia.org/wiki/Indigenous_Amerindian_genetics
modern
【在 c******i 的大作中提到】
: http://phys.org/news/2013-01-ancient-dna-reveals-humans-years.h
: Ancient DNA reveals humans living 40,000 years ago in Beijing area related
: to present-day Asians, Native Americans
: January 21, 2013
: Ancient DNA reveals humans living 40,000 years ago in Beijing area related
: to present-day Asians, Native Americans Enlarge The leg of the early modern
: human from Tianyuan Cave was used for the genetic analysis as well as for
: carbon dating. Credit: MPI for Evolutionary Anthropology An international
: team of researchers including Svante Pääbo and Qiaomei Fu of the
: Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany,
| M****7
发帖数: 2334 | 4 "Analyses of this individual's DNA showed that the Tianyuan human shared a
common origin with the ancestors of many present-day Asians and Native
Americans."
Just curious: how many types of Y chromosomes an "individual" can have? I am
asking about the "individual' whose DNA was studied in the report.
Thanks for providing knowledge.
【在 S****n 的大作中提到】
: 印第安人的Y染色体有三种。如果与印第安人相关，那么Y染色体可能是Q、R、C。而文
: 中又说与今天的亚洲人相关，那么就排除了R。所以只可能是Q和C。这两种在当今中国
: 非常稀少。而在北亚较多。正好说明了这个遗址的古人类与当今中国人关系不大，而与
: 北亚及迁徙到美洲的印第安人祖先关系更近。
: http://en.wikipedia.org/wiki/Indigenous_Amerindian_genetics
:
: modern
| Y******u
发帖数: 1090 | 5 四万年前，那就是和山顶洞人差不多同时期。本来山顶洞人长的就跟现代东亚人差不多。
modern
【在 c******i 的大作中提到】
: http://phys.org/news/2013-01-ancient-dna-reveals-humans-years.h
: Ancient DNA reveals humans living 40,000 years ago in Beijing area related
: to present-day Asians, Native Americans
: January 21, 2013
: Ancient DNA reveals humans living 40,000 years ago in Beijing area related
: to present-day Asians, Native Americans Enlarge The leg of the early modern
: human from Tianyuan Cave was used for the genetic analysis as well as for
: carbon dating. Credit: MPI for Evolutionary Anthropology An international
: team of researchers including Svante Pääbo and Qiaomei Fu of the
: Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany,
| S****n
发帖数: 62 | 6 人类染色体分常染色体，X、Y以及线粒体mtDNA。现有的技术无法通过常染色体识别遗
传特征，因为常染色体不是严格父系或母系遗传的。所以，要识别出与今天亚洲人或印
第安人的关系，只能是Y染色体或线粒体mtDNA。如果是Y染色体，就只能是Q或C，因为R
在亚洲极少。具体到这个个人，如果查Y染色体，只有Q或C才能得出与今天亚洲人（北
亚）及印第安人相关的结论。
am
【在 M****7 的大作中提到】
: "Analyses of this individual's DNA showed that the Tianyuan human shared a
: common origin with the ancestors of many present-day Asians and Native
: Americans."
: Just curious: how many types of Y chromosomes an "individual" can have? I am
: asking about the "individual' whose DNA was studied in the report.
: Thanks for providing knowledge.
:
| c******i
发帖数: 4091 | 7 http://phys.org/news/2013-01-ancient-dna-reveals-humans-years.h
Ancient DNA reveals humans living 40,000 years ago in Beijing area related
to present-day Asians, Native Americans
January 21, 2013
Ancient DNA reveals humans living 40,000 years ago in Beijing area related
to present-day Asians, Native Americans Enlarge The leg of the early modern
human from Tianyuan Cave was used for the genetic analysis as well as for
carbon dating. Credit: MPI for Evolutionary Anthropology An international
team of researchers including Svante Pääbo and Qiaomei Fu of the
Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany,
sequenced nuclear and mitochondrial DNA that had been extracted from the leg
of an early modern human from Tianyuan Cave near Beijing, China. Analyses
of this individual's DNA showed that the Tianyuan human shared a common
origin with the ancestors of many present-day Asians and Native Americans.
In addition, the researchers found that the proportion of Neanderthal and
Denisovan-DNA in this early modern human is not higher than in people living
in this region nowadays. Humans with morphology similar to present-day
humans appear in the fossil record across Eurasia between 40,000 and 50,000
years ago. The genetic relationships between these early modern humans and
present-day human populations had not yet been established. Qiaomei Fu,
Matthias Meyer and colleagues of the Max Planck Institute for Evolutionary
Anthropology in Leipzig, Germany, extracted nuclear and mitochondrial DNA
from a 40,000 year old leg bone found in 2003 at the Tianyuan Cave site
located outside Beijing. For their study the researchers were using new
techniques that can identify ancient genetic material from an archaeological
find even when large quantities of DNA from soil bacteria are present. The
researchers then reconstructed a genetic profile of the leg's owner. "This
individual lived during an important evolutionary transition when early
modern humans, who shared certain features with earlier forms such as
Neanderthals, were replacing Neanderthals and Denisovans, who later became
extinct", says Svante Pääbo of the Max Planck Institute for
Evolutionary Anthropology, who led the study. Ancient DNA reveals humans
living 40,000 years ago in Beijing area related to present-day Asians,
Native Americans Enlarge Researchers carrying out excavation works at the
Tianyuan Cave from which the leg bones had been excavated in 2003. Credit:
Institute of Vertebrate Paleontology and Paleoanthropology (IVPP), Beijing
The genetic profile reveals that this early modern human was related to the
ancestors of many present-day Asians and Native Americans but had already
diverged genetically from the ancestors of present-day Europeans. In
addition, the Tianyuan individual did not carry a larger proportion of
Neanderthal or Denisovan DNA than present-day people in the region. "More
analyses of additional early modern humans across Eurasia will further
refine our understanding of when and how modern humans spread across Europe
and Asia", says Svante Pääbo. Parts of the work were carried out
in a new laboratory jointly run by the Max Planck Society and the Chinese
Academy of Sciences in Beijing. More information: Qiaomei Fu, Matthias Meyer
, Xing Gao, Udo Stenzel, Hernán A. Burbano, Janet Kelso, Svante Pä&#
228;bo, DNA analysis of an early modern human from Tianyuan Cave, China,
PNAS, Online Early Edition, January 21, 2013. Journal reference: Proceedings
of the National Academy of Sciences search and more info website Provided
by Max Planck Society search and more info
Read more at: http://phys.org/news/2013-01-ancient-dna-reveals-humans-years.html#jCp | b****r
发帖数: 17995 | | S****n
发帖数: 62 | 9 印第安人的Y染色体有三种。如果与印第安人相关，那么Y染色体可能是Q、R、C。而文
中又说与今天的亚洲人相关，那么就排除了R。所以只可能是Q和C。这两种在当今中国
非常稀少。而在北亚较多。正好说明了这个遗址的古人类与当今中国人关系不大，而与
北亚及迁徙到美洲的印第安人祖先关系更近。
http://en.wikipedia.org/wiki/Indigenous_Amerindian_genetics
modern
【在 c******i 的大作中提到】
: http://phys.org/news/2013-01-ancient-dna-reveals-humans-years.h
: Ancient DNA reveals humans living 40,000 years ago in Beijing area related
: to present-day Asians, Native Americans
: January 21, 2013
: Ancient DNA reveals humans living 40,000 years ago in Beijing area related
: to present-day Asians, Native Americans Enlarge The leg of the early modern
: human from Tianyuan Cave was used for the genetic analysis as well as for
: carbon dating. Credit: MPI for Evolutionary Anthropology An international
: team of researchers including Svante Pääbo and Qiaomei Fu of the
: Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany,
| M****7
发帖数: 2334 | 10 "Analyses of this individual's DNA showed that the Tianyuan human shared a
common origin with the ancestors of many present-day Asians and Native
Americans."
Just curious: how many types of Y chromosomes an "individual" can have? I am
asking about the "individual' whose DNA was studied in the report.
Thanks for providing knowledge.
【在 S****n 的大作中提到】
: 印第安人的Y染色体有三种。如果与印第安人相关，那么Y染色体可能是Q、R、C。而文
: 中又说与今天的亚洲人相关，那么就排除了R。所以只可能是Q和C。这两种在当今中国
: 非常稀少。而在北亚较多。正好说明了这个遗址的古人类与当今中国人关系不大，而与
: 北亚及迁徙到美洲的印第安人祖先关系更近。
: http://en.wikipedia.org/wiki/Indigenous_Amerindian_genetics
:
: modern
| Y******u
发帖数: 1090 | 11 四万年前，那就是和山顶洞人差不多同时期。本来山顶洞人长的就跟现代东亚人差不多。
modern
【在 c******i 的大作中提到】
: http://phys.org/news/2013-01-ancient-dna-reveals-humans-years.h
: Ancient DNA reveals humans living 40,000 years ago in Beijing area related
: to present-day Asians, Native Americans
: January 21, 2013
: Ancient DNA reveals humans living 40,000 years ago in Beijing area related
: to present-day Asians, Native Americans Enlarge The leg of the early modern
: human from Tianyuan Cave was used for the genetic analysis as well as for
: carbon dating. Credit: MPI for Evolutionary Anthropology An international
: team of researchers including Svante Pääbo and Qiaomei Fu of the
: Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany,
| S****n
发帖数: 62 | 12 人类染色体分常染色体，X、Y以及线粒体mtDNA。现有的技术无法通过常染色体识别遗
传特征，因为常染色体不是严格父系或母系遗传的。所以，要识别出与今天亚洲人或印
第安人的关系，只能是Y染色体或线粒体mtDNA。如果是Y染色体，就只能是Q或C，因为R
在亚洲极少。具体到这个个人，如果查Y染色体，只有Q或C才能得出与今天亚洲人（北
亚）及印第安人相关的结论。
am
【在 M****7 的大作中提到】
: "Analyses of this individual's DNA showed that the Tianyuan human shared a
: common origin with the ancestors of many present-day Asians and Native
: Americans."
: Just curious: how many types of Y chromosomes an "individual" can have? I am
: asking about the "individual' whose DNA was studied in the report.
: Thanks for providing knowledge.
:
| f*******2
发帖数: 410 | 13 参看我发的帖子。现在常染色体才是潮流。分析y，需要大样本来作，单个样本根本很
难有明确详细结果
为R
【在 S****n 的大作中提到】
: 人类染色体分常染色体，X、Y以及线粒体mtDNA。现有的技术无法通过常染色体识别遗
: 传特征，因为常染色体不是严格父系或母系遗传的。所以，要识别出与今天亚洲人或印
: 第安人的关系，只能是Y染色体或线粒体mtDNA。如果是Y染色体，就只能是Q或C，因为R
: 在亚洲极少。具体到这个个人，如果查Y染色体，只有Q或C才能得出与今天亚洲人（北
: 亚）及印第安人相关的结论。
:
: am
|
|
