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Otzi had more Neandertal FNA than modern humans
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RichTravsky
Jun 2, 2013, 7:44:46 PM6/2/13
to
http://www.sciencenews.org/view/generic/id/349698/description/News_in_Brief_American_Association_of_Physical_Anthropologists_meeting
American Association of Physical Anthropologists meeting
Highlights from the annual physical anthropology meeting, Knoxville, April
10-13
A 5,300-year-old man found sticking out of an Alpine glacier in 1991
possessed more genes in common with Neandertals than Europeans today
do. The man's Neandertal heritage is a preliminary sign that Stone
Age interbreeding occurred more frequently than many scientists assume.
Two researchers determined that the previously analyzed genome of Otzi
the Tyrolean Iceman (SN: 3/24/12, p. 5) included roughly 4 to 4.5
percent Neandertal genes. Modern Europeans' genetic library includes
an average of 2.5 percent Neandertal genes.
...
http://meeting.physanth.org/program/2013/session34/sams-2013-analysis-of-archaic-introgression-in-otzi-the-tyrolean-iceman-a-5300-year-old-prehistoric-modern-human.html
The 82nd Annual Meeting of the American Association of Physical
Anthropologists (2013)
Analysis of archaic introgression in Ötzi the Tyrolean Iceman, a
5300 year-old prehistoric modern human
AARON SAMS and JOHN HAWKS.
The contribution of Neandertal populations to present-day peoples
illuminates the process of recent human evolution. The Neandertals
were a relatively peripheral population that occupied western Eurasia
from roughly 150,000 to 30,000 years ago. Nuclear genomic evidence
has been recovered from several later Neandertals, after 50,000 years
ago (Green et al. 2010). Neandertal genomes are more similar to
living people who trace most of their recent ancestry to regions
outside Africa. By contrast, sub-Saharan African people today have
less Neandertal genetic similarity. These comparisons show that in
addition to deriving more than 90% of their genetic heritage from
ancient Africans, most present-day people outside Africa derive a
fraction of their ancestry from the Neandertals (Green et al. 2010).
These comparisons leave unanswered questions. Was population mixture
with Neandertals limited to non-African populations, or do today's
Africans also have some Neandertal ancestors? Did mixture occur as
a singular event, or was there a long process of population
interaction? Did populations who succeeded the Neandertals in Europe
have a higher fraction of Neandertal ancestry?
We carried out a series of comparisons to address these questions.
By examining the Neandertal similarity of individuals from the 1000
Genomes Project, we have substantially expanded the sample of
Neandertal-human comparisons. We also examined the genome of the
Tyrolean Iceman, a European from approximately 5300 years ago. This
is the first comparison of Neandertal genomes to the genome of a
prehistoric modern human individual.
Message has been deleted
Whiskers
Jun 3, 2013, 10:46:29 AM6/3/13
to
On 2013-06-03, The Other Guy <Knews...@gmail.com> wrote:
> NEW theories will replace old theories!!
It stands to reason that once the Neanderthal line was extinct it was no
longer able to contribute to the DNA of other human species, and that those
hom. sap. populations with some Neanderthal ancestry would continue to
interbreed with other populations. This would both scatter the Neanderthal
DNA wider geographically, and dilute its proportion in the resident
European populations. The greater the physical distance between
communities with and without Neanderthal DNA, the less intermixing would
occur. So this is interesting, and useful, but hardly revolutionary - in
my opinion, for whatever that's worth, and of course pending further
discoveries and revelations.
--
-- ^^^^^^^^^^
-- Whiskers
-- ~~~~~~~~~~
> On Sun, 02 Jun 2013 17:44:46 -0600, RichTravsky
> <traRvE...@hotmail.com> wrote:
>
>
>>A 5,300-year-old man found sticking out of an Alpine glacier in 1991
>>possessed more genes in common with Neandertals than Europeans today
>>do. The man's Neandertal heritage is a preliminary sign that Stone
>>Age interbreeding occurred more frequently than many scientists assume.
>
> THAT is simply freaking STUNNING, and will shock a lot of researchers.
> <traRvE...@hotmail.com> wrote:
>
>
>>A 5,300-year-old man found sticking out of an Alpine glacier in 1991
>>possessed more genes in common with Neandertals than Europeans today
>>do. The man's Neandertal heritage is a preliminary sign that Stone
>>Age interbreeding occurred more frequently than many scientists assume.
>
> NEW theories will replace old theories!!
It stands to reason that once the Neanderthal line was extinct it was no
longer able to contribute to the DNA of other human species, and that those
hom. sap. populations with some Neanderthal ancestry would continue to
interbreed with other populations. This would both scatter the Neanderthal
DNA wider geographically, and dilute its proportion in the resident
European populations. The greater the physical distance between
communities with and without Neanderthal DNA, the less intermixing would
occur. So this is interesting, and useful, but hardly revolutionary - in
my opinion, for whatever that's worth, and of course pending further
discoveries and revelations.
--
-- ^^^^^^^^^^
-- Whiskers
-- ~~~~~~~~~~
JTEM
Jun 3, 2013, 9:56:51 PM6/3/13
to
Whiskers <catwhee...@operamail.com> wrote:
> It stands to reason that once the Neanderthal line was extinct it was no
> longer able to contribute to the DNA of other human species, and that those
> hom. sap. populations with some Neanderthal ancestry would continue to
> interbreed with other populations. This would both scatter the Neanderthal
> DNA wider geographically, and dilute its proportion in the resident
> European populations.
Yeah, but try telling this to the paleoanthropology
> It stands to reason that once the Neanderthal line was extinct it was no
> longer able to contribute to the DNA of other human species, and that those
> hom. sap. populations with some Neanderthal ancestry would continue to
> interbreed with other populations. This would both scatter the Neanderthal
> DNA wider geographically, and dilute its proportion in the resident
> European populations.
nitwits...
-- --
http://jtem.tumblr.com
Message has been deleted
JTEM
Jun 4, 2013, 4:29:09 AM6/4/13
to
The Other Guy <KnewsKg...@gmail.com> wrote:
> Whiskers
> interbreeding between Homo Sapiens and Neanderthals.
>
> That seems to be proven wrong by this.
No, it was proven wrong by the morphological evidence
(see Erik Trinkaus), and later confirmed by DNA
analysis. After all, this is reporting MORE Neanderthal
DNA in ancient populations -- MORE than modern populations.
which requires modern to be carrying Neanderthal DNA.
-- --
http://jtem.tumblr.com
> Whiskers
>
> <catwhee...@operamail.com> wrote:
> >It stands to reason that once the Neanderthal line was extinct it was no
> >longer able to contribute to the DNA of other human species, and that those
> >hom. sap. populations with some Neanderthal ancestry would continue to
> >interbreed with other populations. This would both scatter the Neanderthal
> >DNA wider geographically, and dilute its proportion in the resident
> >European populations. The greater the physical distance between
> >communities with and without Neanderthal DNA, the less intermixing would
> >occur. So this is interesting, and useful, but hardly revolutionary - in
> >my opinion, for whatever that's worth, and of course pending further
> >discoveries and revelations.
>
> So many researchers were ABSOLUTELY CERTAIN that there was no
> <catwhee...@operamail.com> wrote:
> >It stands to reason that once the Neanderthal line was extinct it was no
> >longer able to contribute to the DNA of other human species, and that those
> >hom. sap. populations with some Neanderthal ancestry would continue to
> >interbreed with other populations. This would both scatter the Neanderthal
> >DNA wider geographically, and dilute its proportion in the resident
> >European populations. The greater the physical distance between
> >communities with and without Neanderthal DNA, the less intermixing would
> >occur. So this is interesting, and useful, but hardly revolutionary - in
> >my opinion, for whatever that's worth, and of course pending further
> >discoveries and revelations.
>
> interbreeding between Homo Sapiens and Neanderthals.
>
> That seems to be proven wrong by this.
No, it was proven wrong by the morphological evidence
(see Erik Trinkaus), and later confirmed by DNA
analysis. After all, this is reporting MORE Neanderthal
DNA in ancient populations -- MORE than modern populations.
which requires modern to be carrying Neanderthal DNA.
-- --
http://jtem.tumblr.com
RichTravsky
Jun 6, 2013, 11:17:21 AM6/6/13
to
decrease as more mixing of populations occurs. If there were more old DNA
samples, I wonder if it would be possible to project back to when the mixing
ocurred.
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