Limits...
Isolation and prominent aboriginal maternal legacy in the present-day population of La Gomera (Canary Islands).

Fregel R, Cabrera VM, Larruga JM, Hernández JC, Gámez A, Pestano JJ, Arnay M, González AM - Eur. J. Hum. Genet. (2014)

Bottom Line: This value is even greater than that observed in the extant population (44%), which in turn is the highest of all the seven Canary Islands.In contrast to previous results obtained for the aboriginal populations of Tenerife and La Palma, haplogroups related to secondary waves of migration were not detected in La Gomera aborigines, indicating that isolation also had an important role in shaping the current population.The rugged relief of La Gomera divided into several distinct valleys probably promoted subsequent aboriginal intra-insular differentiation that has continued after the European colonization, as seen in the present-day population structure observed on the island.

View Article: PubMed Central - PubMed

Affiliation: Departamento de Genética, Facultad de Biología, Universidad de La Laguna, La Laguna, Tenerife, Spain.

ABSTRACT
The present-day population structure of La Gomera is outstanding in its high aboriginal heritage, the greatest in the Canary Islands. This was earlier confirmed by both mitochondrial DNA and autosomal analyses, although genetic drift due to the fifteenth century European colonization could not be excluded as the main factor responsible. The present mtDNA study of aboriginal remains and extant samples from the six municipal districts of the island indeed demonstrates that the pre-Hispanic colonization of La Gomera by North African people involved a strong founder event, shown by the high frequency of the indigenous Canarian U6b1a lineage in the aboriginal samples (65%). This value is even greater than that observed in the extant population (44%), which in turn is the highest of all the seven Canary Islands. In contrast to previous results obtained for the aboriginal populations of Tenerife and La Palma, haplogroups related to secondary waves of migration were not detected in La Gomera aborigines, indicating that isolation also had an important role in shaping the current population. The rugged relief of La Gomera divided into several distinct valleys probably promoted subsequent aboriginal intra-insular differentiation that has continued after the European colonization, as seen in the present-day population structure observed on the island.

No MeSH data available.


Related in: MedlinePlus

Geographical distribution of municipalities and archaeological sites sampled in this study. Population codes are as in Table 1.
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fig1: Geographical distribution of municipalities and archaeological sites sampled in this study. Population codes are as in Table 1.

Mentions: Prehistoric samples were obtained from 10 different archaeological sites on La Gomera (Table 1; Figure 1; Supplementary Table S1). A total of 97 different individual samples (101 teeth) were collected avoiding direct handling. Teeth on the same mandible were available in four cases only and were replicated independently at the Las Palmas laboratory following the same protocols as for La Laguna. Samples from Vallehermoso were 14C dated from 1600 to 1800 years before present.21 Stratigraphic level and burial characteristics confirmed the aboriginal nature of the rest of the samples.


Isolation and prominent aboriginal maternal legacy in the present-day population of La Gomera (Canary Islands).

Fregel R, Cabrera VM, Larruga JM, Hernández JC, Gámez A, Pestano JJ, Arnay M, González AM - Eur. J. Hum. Genet. (2014)

Geographical distribution of municipalities and archaeological sites sampled in this study. Population codes are as in Table 1.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4538205&req=5

fig1: Geographical distribution of municipalities and archaeological sites sampled in this study. Population codes are as in Table 1.
Mentions: Prehistoric samples were obtained from 10 different archaeological sites on La Gomera (Table 1; Figure 1; Supplementary Table S1). A total of 97 different individual samples (101 teeth) were collected avoiding direct handling. Teeth on the same mandible were available in four cases only and were replicated independently at the Las Palmas laboratory following the same protocols as for La Laguna. Samples from Vallehermoso were 14C dated from 1600 to 1800 years before present.21 Stratigraphic level and burial characteristics confirmed the aboriginal nature of the rest of the samples.

Bottom Line: This value is even greater than that observed in the extant population (44%), which in turn is the highest of all the seven Canary Islands.In contrast to previous results obtained for the aboriginal populations of Tenerife and La Palma, haplogroups related to secondary waves of migration were not detected in La Gomera aborigines, indicating that isolation also had an important role in shaping the current population.The rugged relief of La Gomera divided into several distinct valleys probably promoted subsequent aboriginal intra-insular differentiation that has continued after the European colonization, as seen in the present-day population structure observed on the island.

View Article: PubMed Central - PubMed

Affiliation: Departamento de Genética, Facultad de Biología, Universidad de La Laguna, La Laguna, Tenerife, Spain.

ABSTRACT
The present-day population structure of La Gomera is outstanding in its high aboriginal heritage, the greatest in the Canary Islands. This was earlier confirmed by both mitochondrial DNA and autosomal analyses, although genetic drift due to the fifteenth century European colonization could not be excluded as the main factor responsible. The present mtDNA study of aboriginal remains and extant samples from the six municipal districts of the island indeed demonstrates that the pre-Hispanic colonization of La Gomera by North African people involved a strong founder event, shown by the high frequency of the indigenous Canarian U6b1a lineage in the aboriginal samples (65%). This value is even greater than that observed in the extant population (44%), which in turn is the highest of all the seven Canary Islands. In contrast to previous results obtained for the aboriginal populations of Tenerife and La Palma, haplogroups related to secondary waves of migration were not detected in La Gomera aborigines, indicating that isolation also had an important role in shaping the current population. The rugged relief of La Gomera divided into several distinct valleys probably promoted subsequent aboriginal intra-insular differentiation that has continued after the European colonization, as seen in the present-day population structure observed on the island.

No MeSH data available.


Related in: MedlinePlus