Mediterranean Sea as Genetic Barrier

Posted by DanielS on Friday, 12 May 2017 14:51.

ItaliAnthro, “Mediterranean Sea as Genetic Barrier”, 16 June 2014:

This new study confirms that the Mediterranean Sea has acted as a strong barrier to gene flow through geographic isolation following initial settlements. Samples from (Northern) Italy, Tuscany, Sicily and Sardinia are closest to other Southern Europeans from Iberia, the Balkans and Greece, who are in turn closest to the Neolithic migrants that spread farming throughout Europe, represented here by the Cappadocian sample from Anatolia. But there hasn’t been any significant admixture from the Middle East or North Africa into Southern Europe since then.

Genes Mirror Geography Across the Mediterranean Basin

We first used principal components analysis (PCA) to visualize the genotypic distances between studied populations. Populations on the southern and northern coasts of the Mediterranean appear to be separated by the geographic barrier of the Mediterranean Sea. The role of the Mediterranean Sea as a barrier for gene flow among populations was also supported by our analysis using the BARRIER software, which implements Monmonier’s maximum difference algorithm. In accordance with this finding…the PCA distribution of the populations closely resembles the geographic map of the countries circling the Mediterranean Sea. On this PCA “map” of populations, the east coast of the Mediterranean Sea is appropriately occupied by the Palestinians and the Lebanese Druze. Yemenites and Bedouins branch out from the Mediterranean populations and are closer to the populations of the Near East.

  [...]

Seljuk Turks settled in Anatolia in the 12th century AD; however, the Anatolian Cappadocians we included in this study belong to the population that have kept the religion and the language of the pre-Seljuk Cappadocians and, therefore, most likely carry the genetic makeup of the ancient Anatolians. The only important gene flows from Near East to Europe must have occurred in prehistoric times and, as genetic evidence suggests, the most prominent migrations should have occurred during the Neolithic.

  [...]

Although the Southeastern Mediterranean islands seem to have acted as a bridge from Anatolia to Southern Europe, the relatively small degree of gene flow between the African and the European coasts shows that the Mediterranean Sea also had a barrier function as also suggested with studies of mtDNA polymorphisms. Thus, the Mediterranean seems to have facilitated the migrations of Neolithic farmers along its Southern European coast but it mostly acted as an isolating factor between its European and African coasts.

Adua del Vesco is from Messina, Sicily


Comments:


1

Posted by Prisencolinensinainciuso 1972 on Mon, 15 May 2017 18:58 | #

Adriano Celentano - Prisencolinensinainciusol 1972

Italian recording artist Adriano Celentano’s song composed of gibberish words, written and sung in a way to sound like American English but without any content meaning, only attitude. It is taught to the class and the class grooves with it -


2

Posted by Celentano Not communicating Not on Thu, 18 May 2017 00:22 | #

Perhaps I should not get a kick out of this video, but I do - Adriano Celentano as the cool one, “aaaye”, was a proto-Fonzie, as
“mollegiato”, i.e., the “flexible one”, he was a proto-Jim Carey, he was a proto-rapper even, showing “the attitude” but in a much more good natured and decidedly less dictatorial way - more persuasive by comparison to rap…

...and in his effort to demonstrate communicative barriers he does a little more, probably by accident of nature…

Celentano claimed that his purpose was to show people not communicating but he only succeeded in demonstrating once again that people cannot Not communicate - in fact, he quite well communicates the participatory construction of knowledge as opposed to the traditional linear transmissions model - one-way teacher to student.



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