Paternal lineages in southern Iberia provide time frames for gene flow from mainland Europe and the Mediterranean world



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Hernández de la Fuente, Candela Lucía and Dugoujon, Jean Michel and Sánchez-Martínez, Luis J. and Cuesta, Pedro and Novelletto, Andrea and Calderón Fernández, Rosario (2019) Paternal lineages in southern Iberia provide time frames for gene flow from mainland Europe and the Mediterranean world. Annals of Human Biology, 46 (1). ISSN 1464-5033

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Background: The geography of southern Iberia and an abundant archaeological record of human occupation are ideal conditions for a full understanding of scenarios of genetic history in the area. Recent advances in the phylogeography of Y-chromosome lineages offer the opportunity to set upper bounds for the appearance of different genetic components.

Aim: To provide a global knowledge on the Y haplogroups observed in Andalusia with their Y microsatellite variation. Preferential attention is given to the vehement debate about the age, origin and expansion of R1b-M269 clade and sub-lineages.

Subject and methods: Four hundred and fourteen male DNA samples from western and eastern autochthonous Andalusians were genotyped for a set of Y-SNPs and Y-STRs. Gene diversity, potential population genetic structures and coalescent times were assessed.

Results: Most of the analysed samples belong to the European haplogroup R1b1a1a2-M269, whereas haplogroups E, J, I, G and T show lower frequencies. A phylogenetic dissection of the R1b-M269 was performed and younger time frames than those previously reported in the literature were obtained for its sub-lineages.

Conclusion: The particular Andalusian R1b-M269 assemblage confirms the shallow topology of the clade. Moreover, the sharing of lineages with the rest of Europe indicates the impact in Iberia of an amount of pre-existing diversity, with the possible exception of R1b-DF27. Lineages such as J2-M172 and G-M201 highlight the importance of maritime travels of early farmers who reached the Iberian Peninsula.

Item Type:Article
Uncontrolled Keywords:Andalusia, Y-Chromosome Lineages, R1b-M269, Population Genetics, Neolithic
Subjects:Medical sciences > Biology > Evolution
Medical sciences > Biology > Genetics
ID Code:57122
Deposited On:26 Sep 2019 13:39
Last Modified:01 Oct 2019 09:01

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