Western vs Eastern Andalusia Y-DNA

[berun]

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

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: 414 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.

some quotations:

The notably high frequency of R1b-M529 in the Huelva province (14%), nearly two times higher than those observed in other mainland Iberian populations (0-7%), depicts a specific geographic pattern of this lineage. R1b-M529 is widely disseminated over the European Atlantic coasts, with the highest frequencies (20-50%) in the British Isles, Ireland and north-western France (Valverde et al. 2016; Solé-Morata et al. 2017).

With this in mind, the observed J1-M267 in the Iberian Peninsula is most likely a consequence of the migration of Arabic populations during the Islamic expansion. The J2-M172 seems to be related, however, to the Greek and Phoenician colonies that were established in the Peninsula due to commerce that was mainly linked to mining-related wealth and the
accompanying maritime trades.

In addition, strong dissimilarities appear between the highest frequencies observed for R1b-M269 in the West against the highest diversities detected in the East of the continent. With this evidence, the highest Y-haplotype microsatellite
diversities and variances could not be attributed to the place of origin of a lineage. Furthermore, by considering the specific phylogeographic patterns displayed by some R1b-M269 sub-lineages, the eastern origin attributed to the Y-C haplogroup R1b-M269 is quite unlikely.

Thus, our results would allow the expansion of the DF27 lineage to be moved back from the Bronze Age.

Y-DNA Huelva Granada
E-M81 3% - 3.6%
other E 9% - 3%
G 7.2% - 4.4%
I1 1.2% - 4.8%
I2 3.6% - 4.8%
J-M267 2.4% - 2.8%
other J 5% - 6.5%
L1 + Q 1.2% - 1.2%
R1a 1.8% - 1.6%
R1b 59.6% - 61.8%

from the total, 11 individuals were basal M269 (2.5%), also four in ten are DF27

 

[Angela]

This has already been posted.

As for the content, again, as is unfortunately the case in some of these studies there's a lot of speculation.

Phoenicians could have carried J1 as well as J2. J1 need not only be from the Arabs.

 

[berun]

then merge it with the first threat...

 

[berun]

I can't find where it was posted before. Well, two comments, one is how with a 2,5% of males it was possible to change language (for Arab). And that the Y DNA in west and east is so similar, I would expect more differences as histories were different, but maybe the Reconquista rolled over everything, as in autosomals. Western Andalusia was in the Atlantic Bronze Age, it was more Orientalized, it was developed there Tartessos (with a language unrelated to that of the east), and the west was conquered by Castillans 2 centuries before than the east (Emirate of Granada).