Speranza
According to archaeological records and historical documentation, Italy has been
a melting point for populations of different geographical and ethnic matrices.
Although Italy has been a favourite subject for numerous population genetic
studies, genetic patterns have never been analyzed comprehensively, including
uniparental and autosomal markers throughout the country.
Not all of these
various peoples were linguistically or ethnically closely related.
Some of them
spoke Italic languages, and others belonged to another Indo-European branch
(Ligurian, Venetic, Lepontic) or were non-Indo-European (Etruscan,
Raetic).
In 2008, geneticists determined that ITALIA is one of the last
two remaining genetic islands in Europe (the other being Finland.)
This is due
in part to the presence of the Alpine mountain chain which, over the centuries,
has prevented large migration flows aimed at colonizing the Italian
lands.
Modern man appeared during the Upper Paleolithic. Specimens of
Aurignacian age were discovered in the cave of Fumane and dated back about
34,000 years ago.
During the Magdalenian period the first men from the Pyrenees
populated Sardinia.
During the Neolithic farming is introduced by people
from the east and the first villages are built, weapons become more
sophisticated and the first objects in clay are produced.
In the late
Neolithic era the use of copper spreads and villages are built over piles near
lakes.
In Sardinia, Sicily and part of "Continental Italy" the Beaker culture
spreads from Western Europe.
During the Late Bronze Age the Urnfield or
Villanovan culture appears in Italy, characterized by the typical rite of
cremation of the bodies originating from Central Europe, the use of iron
spreads.
In Sardinia the Nuragic civilization flourishes.
From the 8th
century BC Greek colonists settle on the southern coast and in Sicily and found
cities, initiating what was later called Magna Graecia.
The Etruscan
civilization developed on the coast of Tuscany and Latium.
In the 5th century
Celtic tribes from continental Europe settled in Northern Italy and parts of
Central Italy.
With the Fall of the Roman Empire different populations of
German origin invaded Italy, the most significant was that of the Lombards, who
will try to unify politically the "Boot of Italy".
In most of the Po Valley and
Emilia-Romagna, a majority of the population belongs to Haplogroup R1b.
This
percentage lowers at the extreme south of Italy in Sicily (30%).
A Università
Cattolica del Sacro Cuore study found that while Greek colonization left little
significant genetic contribution, data analysis sampling 12 sites in the Italian
peninsula supported a male demic diffusion model and Neolithic admixture with
Mesolithic inhabitants.
The results supported a distribution of genetic
variation along a North-South Axis and supported demic diffusion.
South Italian
samples clustered with South east and south central European samples, and
Northern groups with West Europe.
A study by Semino et al.
contradicted this study, and shows that Italians in North-central regions (like
Tuscany and Emilia-Romagna) had a higher concentration of J2 than their Southern
counterparts.
North-central had 26.9% J2, whereas Calabria (a far Southern
region) had 20.0%, Sardinia had 9.7% and Sicily had 16.7%.
Migrations that occurred on Italian soil from the fall
of the Roman Empire until 1000 AD have probably not significantly altered the
gene pool of the Italian people.
Despite the lengthy Goth and
Lombard presence in Italy, it is estimated that the I1 haplogroup associated
with the Germanic peoples is only present among Italians in the north in the
order of 2-3% and from 1 to 1.5% among Italians in the south.
Other
haplotypes that could have been penetrated in Italy together with the German
invaders are haplogroup R1a which belongs to 2.5% of Italians and some subclades
of the R1b Haplogroup (in particular the subclade R1b1c9 that owns 3.5% of
Italians and is particularly widespread among the peoples of north-west
Italy) but because these haplogroups are just mentioned fairly commonly in other
European ethnic groups it is difficult to establish whether they have been
really brought into Italy by Germanic peoples or by other peoples (e.g. Slavs).
The Germanic or Nordic heritage among the Italians then wanders around
5-10%.
In Sicily further migrations from the Vandals, Normans and Saracens
have only slightly affected the ethnic composition of the Sicilian people.
The
Arab civilization flourished undisturbed for nearly a century and the impact of
Arab-Berber colonization occurred in a more intense way.
Ultimately, the North
African male contribution to Sicily was estimated between 6 and
7.5%.
In Italy, as
elsewhere in Europe, the most common haplogroup is haplogroup H originated
probably about 20,000 years ago in southern Europe or in the Near East.
African Haplogroup L lineages are relatively infrequent (1% or less)
throughout Italy with the exception of Latium, Volterra, Basilicata and Sicily
where frequencies between 2 and 3% have been found.
A study by
Brisighelli et al. states that an analysis of ancestral informative markers
"as carried out in the present study indicated that Italy shows a very minor
sub-Saharan African component that is, however, slightly higher than
non-Mediterranean Europe."
Discussing sub-Saharan African mtDNAs the study
states that these indicate that a significant proportion of these lineages could
have arrived in Italy more than 10,000 years ago.
Therefore, their presence in
Europe does not necessarily date to the time of the Roman Empire, the Atlantic
slave trade or to modern migration.
These mtDNAs by Brisighelli et al
were reported with the given results as "Mitochondrial DNA haplotypes of African
origin are mainly represented by haplogroups M1 (0.3%), U6 (0.8%) and L (1.2%)"
for the 583 samples tested.
Close genetic similarity between Ashkenazi
Jews and Italians has been noted frequently in genetic
studies.
Recent studies have shown that ITALIA has
played an important role in the recovery of 'Western Europe" at the end of the
Last glacial period.
The study focused mitochondrial U5b3 haplogroup discovered
that this FEMALE lineage had in fact originated in Italy and that then expanded
from the Peninsula around 10,000 years ago towards Provence and the Balkans.
In
Provence, probably between 9,000 and 7,000 years ago, it gave rise to the
haplogroup subclade U5b3a1.
This subclade U5b3a1 later came from Provence to
Sardinia by obsidian merchants, as it is estimated that 80% of obsidian found in
France comes from Monte Arci in Sardinia reflecting the close relations that
were at the time of these two regions.
Still about 4% of the female population
in Sardinia belongs to this haplotype.
See also[edit]
Genetic history
of Europe
European ethnic groups
References[edit]
Jump up ^
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050794#pone-0050794-g002
Jump
up ^ "Genetic Map of Europe". New York Times. August 2008. Retrieved 25 February
2014.
Jump up ^ Siiri Rootsi: Y-Chromosome haplogroup I prehistoric gene
flow in Europe, UDK 902(4)"631/634":577.2, Documenta Prehistorica XXXIII
(2006)
Jump up ^ [1][dead link] Culture del bronzo recente in Italia
settentrionale e loro rapporti con la "cultura dei campi di urne"
Jump up ^ Y
chromosome genetic variation in the Italian peni... [Mol Phylogenet Evol. 2007]
- PubMed result
Jump up ^ Capelli, C. et al., Y chromosome genetic variation
in the Italian peninsula is clinal ..., Mol. Phy-logenet. Evol. (2007),
doi:10.1016/j.ympev.2006.11.030
Jump up ^ The History and Geography of Human
Genes Search results for "Southern Italy" on Google Books
Jump up ^ Ornella
Semino et al., "Origin, Diffusion, and Differentiation of Y-Chromosome
Haplogroups E and J: Inferences on the Neolithization of Europe and Later
Migratory Events in the Mediterranean Area," American Journal of Human Genetics
74:1023–1034, 2004.
Jump up ^
http://books.google.com/books?id=FrwNcwKaUKoC&printsec=frontcover&dq=history+of+human+genes&hl=en&ei=yQtITqPZDoOcgQfc28GsBg&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCoQ6AEwAA#v=snippet&q=roman&f=false
Jump
up ^
http://books.google.com/books?id=FrwNcwKaUKoC&printsec=frontcover&dq=history+of+human+genes&hl=en&ei=yQtITqPZDoOcgQfc28GsBg&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCoQ6AEwAA#v=snippet&q=roman&f=false
Jump
up ^ [2] Y-chromosome Short Tandem Repeat DYS458.2 Non-consensus Alleles Occur
Independently in Both Binary Haplogroups J1-M267 and R1b3- M405
Jump up ^
"The genetic contribution of Greek chromosomes to the Sicilian gene pool is
estimated to be about 37% whereas the contribution of North African populations
is estimated to be around 6%.", Differential Greek and northern African
migrations to Sicily are supported by genetic evidence from the Y chromosome
European Journal of Human Genetics (2009) 17, 91–99; doi:10.1038/ejhg.2008.120;
published online 6 August 2008
Jump up ^ Moors and Saracens in Europe,
estimating the medieval North African male legacy in southern Europe European
Journal of Human Genetics (2009) 17, 848–852; doi:10.1038/ejhg.2008.258;
published online 21 January 2009
Jump up ^ Table 1 Historically introduced NW
African types in Italy and Iberia
Jump up ^ 4/138=2.90% in Latium,
3/114=2.63% in Volterra, 2/92=2.20% in Basilicata and 3/154=2% in Sicily,
Achilli et al.2007, Mitochondrial DNA Variation of Modern Tuscans Supports the
Near Eastern Origin of Etruscans
Jump up ^
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050794#pone-0050794-g002
Jump
up ^
http://www.plosone.org/article/info:doi/10.1371/journal.pone.0050794#pone-0050794-g002
Jump
up ^ Zoossmann-Diskin, Avshalom (2010). "The origin of Eastern European Jews
revealed by autosomal, sex chromosomal and mtDNA polymorphisms". Biol Direct 5
(57): 57. doi:10.1186/1745-6150-5-57. PMC 2964539. PMID 20925954
Jump up ^
Did Modern Jews Originate in Italy? Michael Balter, ScienceNOW, 8 October
2013
Jump up ^ Genetic Roots of the Ashkenazi Jews
Jump up ^ M. D. Costa
and 16 others (2013). "A substantial prehistoric European ancestry amongst
Ashkenazi maternal lineages". Nature Communications 4. doi:10.1038/ncomms3543.
Jump up ^ Rosenberg et al. 2002,Bauchet et al. 2007
Jump up ^ C.Tian et
al. 2009, European Population Genetic Substructure: Further Definition of
Ancestry Informative Markers for Distinguishing among Diverse European Ethnic
Groups
Jump up ^ Chao Tian et al. 2009, Paired Fst values for European
populations
Jump up ^ [3] American Journal of Human Genetics : Mitochondrial
Haplogroup U5b3: A Distant Echo of the Epipaleolithic in Italy and the Legacy of
the Early Sardinians
Retrieved from
"http://en.wikipedia.org/w/index.php?title=Genetic_history_of_Italy&oldid=602511902"
Categories:
History of Italy by theme
Genetics by country
Modern
human genetic history
Wednesday, May 7, 2014
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