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Population structure in the Mediterranean basin: a Y chromosome perspective.

C Capelli¹, N Redhead, V Romano

¹Department of Biology, University College of London, London, UK. cristian.capelli@promega.com

Annals of Human Genetics

|April 22, 2006

Summary

Investigating Y chromosome variation reveals four distinct genetic clusters across the Mediterranean: North Africa, Arab, Central-East, and West Mediterranean. Arab expansion significantly shaped genetic structure in the Fertile Crescent.

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Area of Science:

Population Genetics
Human Evolutionary Studies
Genomic Diversity

Background:

The Mediterranean's genetic landscape is influenced by historical demographic events, but their impact remains debated.
Understanding population structure is key to deciphering human migration and admixture patterns.

Purpose of the Study:

To investigate the population structure across the Mediterranean using Y chromosome variation.
To identify distinct genetic clusters and their historical drivers.

Main Methods:

Analysis of Y chromosome variation in a large dataset of Mediterranean populations.
Inclusion of 11 newly described populations in the study.

Main Results:

Identification of four major genetic clusters: North Africa, Arab, Central-East, and West Mediterranean.
Near Eastern samples showed distinct clustering related to Arab Y chromosome lineages.
Evidence suggests a significant role of Arab expansion in shaping genetic structure within the Fertile Crescent.

Conclusions:

The Y chromosome variation highlights significant population structuring across the Mediterranean.
Arab expansion is identified as a key factor in the genetic makeup of the Fertile Crescent populations.