Arqueología de las islas Canarias

Mederos, Juan Francisco Navarro

doi:10.5944/etfi.10.1997.4662

Cited by 17 publications

(15 citation statements)

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“…In addition, our results evidenced significant differences in the mean ancestry block lengths interpreted as of recent SSA and NAF origin in Canary Islanders. While this result may be indicative of admixture events involving different African components, as has been supported by many previous studies ( Arco and Navarro 1987 ; de Castro 1987 ; Navarro Mederos 1997 ; Flores et al. 2003 ), independent analyses should aim to establish the time periods of such events.…”

Section: Discussionsupporting

confidence: 70%

Genomic analyses of human European diversity at the southwestern edge: isolation, African influence and disease associations in the Canary Islands

Guillén‐Guío

Lorenzo-Salazar

González-Montelongo

et al. 2018

Molecular Biology and Evolution

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Despite the genetic resemblance of Canary Islanders to other southern European populations, their geographical isolation and the historical admixture of aborigines (from North Africa) with sub-Saharan Africans and Europeans have shaped a distinctive genetic makeup that likely affects disease susceptibility and health disparities. Based on single nucleotide polymorphism array data and whole genome sequencing (30×), we inferred that the last African admixture took place ∼14 generations ago and estimated that up to 34% of the Canary Islander genome is of recent African descent. The length of regions in homozygosis and the ancestry-related mosaic organization of the Canary Islander genome support the view that isolation has been strongest on the two smallest islands. Furthermore, several genomic regions showed significant and large deviations in African or European ancestry and were significantly enriched in genes involved in prevalent diseases in this community, such as diabetes, asthma, and allergy. The most prominent of these regions were located near LCT and the HLA, two well-known targets of selection, at which 40‒50% of the Canarian genome is of recent African descent according to our estimates. Putative selective signals were also identified in these regions near the SLC6A11-SLC6A1, KCNMB2, and PCDH20-PCDH9 genes. Taken together, our findings provide solid evidence of a significant recent African admixture, population isolation, and adaptation in this part of Europe, with the favoring of African alleles in some chromosome regions. These findings may have medical implications for populations of recent African ancestry.

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Section: Discussionsupporting

confidence: 70%

Genomic analyses of human European diversity at the southwestern edge: isolation, African influence and disease associations in the Canary Islands

Guillén‐Guío

Lorenzo-Salazar

González-Montelongo

et al. 2018

Molecular Biology and Evolution

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“…Moreover, the pairwise matches of the Atlantic populations were higher in the westernmost islands of El Hierro (29%) and La Palma (24%). This result is in agreement with the records suggesting that the Norman settlement in El Hierro 43 and the Flemish in La Palma 44 are particularly important. Finally, the prevalence of pairwise matching of putative sub-Saharan African sequences was highest in Gran Canaria (20%).…”

Section: Resultssupporting

confidence: 93%

Digging into the admixture strata of current-day Canary Islanders based on mitogenomes

et al. 2023

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“…The islands were first populated by farming populations from North Western Africa as evidenced by archeological (Navarro‐Mederos, 1997), genetic (Fregel et al, 2019; Maca‐Meyer et al, 2004), and linguistic studies (Springer, 2001; 2019). The Europeans arrived in the islands in the Middle Ages and conquered the archipelago in 1496 AD (de Abreu Galindo, 1977).…”

Section: Introductionmentioning

confidence: 99%

The early lives of the islanders: Stable isotope analysis of incremental dentine collagen from the prehispanic period of the Canary Islands

Sánchez‐Cañadillas,

Beaumont,

Santana‐Cabrera

et al. 2023

American Journal of Biological Anthropology

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ObjectivesThis study presents isotopic information for incremental dentine collagen and bone bulk collagen from individuals from the Canary Islands (Tenerife and Gran Canaria) to explore dietary differences during childhood life.Materials and MethodsEight individuals have been studied, which comprises 122 δ15N and δ13C incremental dentine measurements and eight bulk bone collagen analyses. A baseline of potentially consumed food sources has been developed for comparative purposes. A food reconstruction using isotopic transferred signals (FRUITS) model of probable contributions of each food source towards the diet of each individual has been developed. All samples but one belongs to the later period of indigenous occupation of the archipelago.ResultsThe dentine collagen data are presented in correlated δ13C and δ15N plots per individual, showing the isotopic changes throughout time. δ15N values for each individual tend to be variable whereas δ13C data are generally more stable with a range of +9.1 to +14‰ for δ15N and −17.4 to −20.8‰ for δ13C.ConclusionThe isotopic analysis allows for the reconstruction of eight dietary profiles, which allow us to estimate the different dietary protein sources. The FRUITS model shows different percentages of the primary food sources for each individual. Where both δ13C and δ15N are elevated, this could be indicative of a higher marine contribution to the diet. There appear to be two main dietary profiles identifiable in the dataset and these may be related to changes in status or place of residence. Short‐term variations in δ13C and δ15N and opposing co‐variance of isotopic values can be indicative of nutritional stress, although metabolic changes during growth are also considered.

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Arqueología de las islas Canarias

Cited by 17 publications

References 1 publication

Genomic analyses of human European diversity at the southwestern edge: isolation, African influence and disease associations in the Canary Islands

Genomic analyses of human European diversity at the southwestern edge: isolation, African influence and disease associations in the Canary Islands

Digging into the admixture strata of current-day Canary Islanders based on mitogenomes

The early lives of the islanders: Stable isotope analysis of incremental dentine collagen from the prehispanic period of the Canary Islands

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