Canarian People - Ancestry - Population Genetics

Population Genetics

The most frequent mtDNA haplogroup in Canary Islands is H (37.6%), followed by U6 (14.0%), T (12.7%), U (except U6) (10.3%) and J (7.0%). Two haplogroups, H and U6 alone account for more than 50% of the individuals. Significant frequencies of sub-Saharan L haplogroups (6.6%) is also consistent with the historical records on introduction of sub-Saharan slave labour in Canary Islands. However some Sub-Saharan lineages are also found in North African populations, and as a result, some of these L lineages could have been introduced to the Islands from North Africa. A 2009 study of DNA extracted from the remains of aboriginal inhabitants found that 7% of lineages were Haplogroup L. This leaves open the possibility that these L lineages were part of the founding population of the Canary Islands.

A 2003 genetics research article by Nicole Maca-Meyer et al. published in the European Journal of Human Genetics compared aboriginal Guanche mtDNA (collected from Canarian archaeological sites) to that of today's Canarians and concluded that, "despite the continuous changes suffered by the population (Spanish colonization, slave trade), aboriginal mtDNA lineages constitute a considerable proportion of the Canarian gene pool.

Although the Berbers are the most probable ancestors of the Guanches, it is deduced that important human movements have reshaped Northwest Africa after the migratory wave to the Canary Islands and the "results support, from a maternal perspective, the supposition that since the end of the 16th century, at least, two-thirds of the Canarian population had an indigenous substrate, as was previously inferred from historical and anthropological data." mtDNA haplogroup U subclade U6b1 is Canarian-specific and is the most common mtDNA haplogroup found in aboriginal Guanche archaeological burial sites.

Y-DNA, or Y-chromosomal, (direct paternal) lineages were not analyzed in this study; however, an earlier study giving the aboriginal y-DNA contribution at 6% was cited by Maca-Meyer et al., but the results were criticized as possibly flawed due to the widespread phylogeography of y-DNA haplogroup E1b1b1b, which may skew determination of the aboriginality versus coloniality of contemporary y-DNA lineages in the Canaries. Regardless, Maca-Meyer et al. states that historical evidence does support the explanation of "strong sexual asymmetry...as a result of a strong bias favoring matings between European males and aboriginal females, and to the important aboriginal male mortality during the Conquest." The genetics thus suggests the native men were sharply reduced in numbers due to the war, large numbers of Spanish men stayed in the islands and married the local women, the Canarians adopted Spanish names, language, and religion, and in this way, the Canarians were Hispanicized.

According to a recent study by Fregel et al. 2009, in spite of the geographic nearness between the Canary Islands and Morocco, the genetic heritage of the Canary islands male lineages, is mainly from European origin. Indeed, nearly 67% of the haplogroups resulting from are Euro–Eurasian (R1a(2.76%), R1b (50.62%), I (9.66%) and G (3.99%)). Unsurprisingly the Spanish conquest brought the genetic base of the current male population of the Canary Islands. Nevertheless, the second most important Haplogroup origin is Northern Africa, Near and Middle East. E1b1b (14% including 8.30% of the typical berber haplogroup E-M81), E1b1a and E1a (1.50%), J (14%) and T (3%) Haplogroups are present at a rate of 33%. Even if a part of these "eastern" haplogroups were introduced by the Spanish (they are well represented in Spain), we can suppose that a good portion of this rate was already there at the time of the conquest. According to the same study, the presence of autochthonous North African E-M81 lineages, and also other relatively abundant markers (E-M78 and J-M267) from the same region in the indigenous Guanche population, "strongly points to that area as the most probable origin of the Guanche ancestors". In this study, Fregel et al. estimated that, based on Y-chromosome and mtDNA haplogroup frequencies, the relative female and male indigenous Guanche contributions to the present-day Canary Islands populations were respectively of 41.8% and 16.1%.

An autosomal study in 2011 found an average Northwest African influence of about 17% in Canary Islanders with a wide interindividual variation ranging from 0% to 96%. According to the authors, the substantial Northwest African ancestry found for Canary Islanders supports that, despite the aggressive conquest by the Spanish in the 15th century and the subsequent immigration, genetic footprints of the first settlers of the Canary Islands persist in the current inhabitants. Paralleling mtDNA findings, the largest average Northwest African contribution was found for the samples from La Gomera.