From: dgkilday57
Message: 69794
Date: 2012-06-08
>Right. "She thinks my tractor's sexy." Or in those days, the hot country single would have been "She thinks my harrow's sexy."
> [...]
>
> [quoted]
>
> Agriculture emerged on the human
>
> cultural scene about 10,000 years
>
> ago, spreading rapidly through
>
> Europe from the Near East to the
>
> British Isles in about 4,000 years.
>
> But did this world-changing
>
> technology get disseminated via an
>
> expanding wave of industrious
>
> farmers or through word-of-mouth
>
> among local hunter-gatherer
>
> populations?
>
> To help answer this much-debated
>
> question, researchers have peered
>
> into the genetics of modern
>
> Europeans for clues. Mark Jobling of
>
> the University of Leicester in the
>
> U.K. and his colleagues found not
>
> only that agriculture seems to have
>
> spread westward via a new group of
>
> Neolithic people from the Near East,
>
> but also that these new farmers were
>
> incredibly successful with the local
>
> ladies, leaving their genetic traces
>
> in their modern male descendents.
>
> "We focused on the commonest Y-
>
> chromosome lineage in Europe,"
>
> Jobling said in a prepared
>
> statement. The team analyzed a
>
> single haplotype, R1b1b2 (which is
>
> carried by about 110 million men in
>
> Europe today) from 2,574 European
>
> men whose families had been living
>
> in the same location for at least
>
> two generations. This common
>
> haplotype, however, is not randomly
>
> distributed across the continent.
>
> "It follows a gradient from south-
>
> east to north-west," he said. About
>
> 12 percent of men in eastern Turkey
>
> have it, whereas some 85 percent of
>
> men carry it in Ireland.
>
> Others have previously speculated
>
> that this distribution was due to
>
> earlier, Paleolithic expansion from
>
> Africa. But Jobling and his fellow
>
> researchers asserted that it
>
> reflects a rapid, more recent
>
> genetic spread during the Neolithic
>
> —one that has a "striking"
>
> correlation with known Neolithic
>
> sites. "The geographical
>
> distribution of diversity within the
>
> haplogroup is best explained by its
>
> spread from a single source from the
>
> Near East via [Turkey] during the
>
> Neolithic," the authors concluded in
>
> their study, which was published
>
> online January 19 in PLoS Biology.
>
> "In total, this means that more than
>
> 80 percent of European Y chromosomes
>
> descend from incoming farmers,"
>
> geneticist Patricia Balaresque, also
>
> of the University of Leicester and
>
> lead study author, said in a
>
> prepared statement. "In contrast,
>
> most maternal genetic lineages seem
>
> to descend from hunter-gatherers."
>
> How could these early European
>
> ancestors come from such different
>
> groups? "To us, this suggests a
>
> reproductive advantage for farming
>
> males over indigenous hunter-
>
> gatherer males during the switch
>
> from hunting and gathering to
>
> farming," Balaresque said. "Maybe,
>
> back then, it was just sexier to be
>
> a farmer."