c**i
发帖数: 6973 | 1 Gautam Naik, Clues to Man's First Migration; Genes from Australia point to
several waves African dispersal, not just one. Wall Street Journal, Sept 23,
2011.
http://online.wsj.com/article/SB1000142405
3111904563904576586783498941802.html
My comment:
(a) If you can not read the report (because WSJ restricts how many a person
can view its article for free), you can read
Ann Gibbons, Aboriginal Genome Shows Two-Wave Settlement of Asia. Science,
333: 1689-1691 (Sept 23, 2011).
http://www.sciencemag.org/content/333/6050/1689.full
("The complete genome is the first from an Australian Aboriginal, and it
came from a man born before his people had mixed with Europeans or Asians.
Although the DNA in the hair was highly fragmented, Willerslev's team was
able to get 6× coverage of the overall genome")
The News and Analysis report heralds a paper of the same issue, as well as
Reich D et al, Denisova Admixture and the First Modern Human Dispersals into
Southeast Asia and Oceania. American Journal of Human Genetics, _: _ (Sept
22, 2011)
http://www.cell.com/AJHG/abstract/S0002-9297(11)00395-8
Written from Australia's perspective, aborigines or aboriginals (which means
the same) mean those of Australia.
(b) Please note that the paper advances a novel model that is not tested,
which is Australia aborigines are the direct descendants of Africans who
left Africa, as opposed to descendants, or a branch, of latter-day Asians.
WSJ mentions the "conventional model": "that there was only a single
dispersal from Africa, some 60,000 to 70,000 years ago" and one group headed
north and became Europeans and the other group headed east along the sea
coasts and became Indians, then southeast Asians--who then split north to
China and south to Australia.
(c) Melanesia
http://en.wikipedia.org/wiki/Melanesia
(d) Austronesian peoples
http://en.wikipedia.org/wiki/Austronesian_peoples
It is established that aborigines of Taiwan, Micronesia and Polynesia
demonstrate language, biological (down to DNA) and archaelogical
similarities. The similarities extend to aborigines in the conventional
Melanesia (such as Solomon Islands, Vanuatu, and Fiji--but not with those
in Papua New Guinea (part of Melanesia) or in Australia. | G***y
发帖数: 1082 | 2 呵呵,我也刚看到.如今100年前的头发都可以常规测序了.他们好像都没用什么ancient
DNA的技术.
23,
person
【在 c**i 的大作中提到】
: Gautam Naik, Clues to Man's First Migration; Genes from Australia point to
: several waves African dispersal, not just one. Wall Street Journal, Sept 23,
: 2011.
: http://online.wsj.com/article/SB1000142405
: 3111904563904576586783498941802.html
: My comment:
: (a) If you can not read the report (because WSJ restricts how many a person
: can view its article for free), you can read
: Ann Gibbons, Aboriginal Genome Shows Two-Wave Settlement of Asia. Science,
: 333: 1689-1691 (Sept 23, 2011).
| c**i
发帖数: 6973 | 3 In contrast to News and Analysis in Science ("6X"), WSJ says only 40% (?,
from my memory) of genome of that particular aborigine.
ancient
【在 G***y 的大作中提到】
: 呵呵,我也刚看到.如今100年前的头发都可以常规测序了.他们好像都没用什么ancient
: DNA的技术.
:
: 23,
: person
| s******s
发帖数: 13035 | 4 没看文章。这个没啥in contrast的，有钱搞个600x，估计90%就有了
【在 c**i 的大作中提到】
: In contrast to News and Analysis in Science ("6X"), WSJ says only 40% (?,
: from my memory) of genome of that particular aborigine.
:
: ancient
| w*****y
发帖数: 3900 | 5 4000年前的头发都测序了
http://www.nature.com/nature/journal/v463/n7282/full/nature0883
ancient
【在 G***y 的大作中提到】
: 呵呵,我也刚看到.如今100年前的头发都可以常规测序了.他们好像都没用什么ancient
: DNA的技术.
:
: 23,
: person
| w*****y
发帖数: 3900 | 6 6x是genome average,分析了40%的region,这部分平均是11x的coverage
【在 c**i 的大作中提到】
: In contrast to News and Analysis in Science ("6X"), WSJ says only 40% (?,
: from my memory) of genome of that particular aborigine.
:
: ancient
| w*****y
发帖数: 3900 | 7 新闻里说样本用完了
【在 s******s 的大作中提到】
: 没看文章。这个没啥in contrast的，有钱搞个600x，估计90%就有了
| G***y
发帖数: 1082 | 8 那个是在永冻土里的，保存应该比较好吧。这把头发就是在常温放了一百年。
【在 w*****y 的大作中提到】
: 4000年前的头发都测序了
: http://www.nature.com/nature/journal/v463/n7282/full/nature0883
:
: ancient
|
|
