Mitochondrial portraits of the Madeira and Açores archipelagos witness different genetic pools of its settlers
We have studied the matrilineal genetic composition of the Madeira and Açores north Atlantic archipelagos, which were settled by the Portuguese in the 15th century. Both archipelagos, and particularly Madeira, were involved in a complex commercial network established by the Portuguese, which include...
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Online Access: | http://hdl.handle.net/10400.13/3046 https://doi.org/10.1007/s00439-003-1024-3 |
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ftunivmadeira:oai:digituma.uma.pt:10400.13/3046 2023-06-11T04:14:53+02:00 Mitochondrial portraits of the Madeira and Açores archipelagos witness different genetic pools of its settlers Brehm, António Pereira, Luísa Kivisild, Toomas Amorim, António 2003 http://hdl.handle.net/10400.13/3046 https://doi.org/10.1007/s00439-003-1024-3 eng eng Springer info:eu-repo/grantAgreement/FCT/POCTI/SFRH%2FBPD%2F7121%2F2001/PT Brehm, A., Pereira, L., Kivisild, T., & Amorim, A. (2003). Mitochondrial portraits of the Madeira and Açores archipelagos witness different genetic pools of its settlers. Human genetics, 114(1), 77-86. http://hdl.handle.net/10400.13/3046 doi:10.1007/s00439-003-1024-3 openAccess http://creativecommons.org/licenses/by/4.0/ DNA Mitochondrial European Continental Ancestry Group Gene Frequency Geography Haplotypes Humans Male Mitochondria Portugal Gene Pool Açores (Portugal) Madeira (Portugal) Faculdade de Ciências da Vida article 2003 ftunivmadeira https://doi.org/10.1007/s00439-003-1024-3 2023-05-28T07:05:16Z We have studied the matrilineal genetic composition of the Madeira and Açores north Atlantic archipelagos, which were settled by the Portuguese in the 15th century. Both archipelagos, and particularly Madeira, were involved in a complex commercial network established by the Portuguese, which included the trading of slaves across the Atlantic. One hundred and fifty-five mtDNAs sampled from the Madeira and 179 from the Açores archipelagos were analysed for the hypervariable segment I (HVS-I), and for haplogroup-diagnostic coding-region RFLPs. The different settlement histories of both groups of islands are well reflected in their present day mtDNA pool. Although both archipelagos show identical diversity values, they are clearly different in their haplogroup content. Madeira displays a stronger sub-Saharan imprint, with haplogroups L1-L3 constituting about 13% of the lineages. Also, the relative frequencies of L sub-clusters in Madeira and mainland Portugal suggests that, at least in part, African presence in Madeira can be attributed to a direct gene flow from West Africa and not via Portugal. A comparison of the genetic composition of these two archipelagos with the Canary Islands, specially taking into account that their European source population was essentially from the Iberian Peninsula, testifies the stronger impact of the North African U6 cluster in the Canaries. This group is present in Madeira at a moderate frequency, but very reduced in the Açores. Nevertheless the recorded introduction of Canary native Guanches, who are characterized by the presence of particular sub-clade U6b1, has left no detectable imprints in the present day population of Madeira. info:eu-repo/semantics/publishedVersion Article in Journal/Newspaper North Atlantic Universidade da Madeira: DigitUMa Human Genetics 114 1 77 86 |
institution |
Open Polar |
collection |
Universidade da Madeira: DigitUMa |
op_collection_id |
ftunivmadeira |
language |
English |
topic |
DNA Mitochondrial European Continental Ancestry Group Gene Frequency Geography Haplotypes Humans Male Mitochondria Portugal Gene Pool Açores (Portugal) Madeira (Portugal) Faculdade de Ciências da Vida |
spellingShingle |
DNA Mitochondrial European Continental Ancestry Group Gene Frequency Geography Haplotypes Humans Male Mitochondria Portugal Gene Pool Açores (Portugal) Madeira (Portugal) Faculdade de Ciências da Vida Brehm, António Pereira, Luísa Kivisild, Toomas Amorim, António Mitochondrial portraits of the Madeira and Açores archipelagos witness different genetic pools of its settlers |
topic_facet |
DNA Mitochondrial European Continental Ancestry Group Gene Frequency Geography Haplotypes Humans Male Mitochondria Portugal Gene Pool Açores (Portugal) Madeira (Portugal) Faculdade de Ciências da Vida |
description |
We have studied the matrilineal genetic composition of the Madeira and Açores north Atlantic archipelagos, which were settled by the Portuguese in the 15th century. Both archipelagos, and particularly Madeira, were involved in a complex commercial network established by the Portuguese, which included the trading of slaves across the Atlantic. One hundred and fifty-five mtDNAs sampled from the Madeira and 179 from the Açores archipelagos were analysed for the hypervariable segment I (HVS-I), and for haplogroup-diagnostic coding-region RFLPs. The different settlement histories of both groups of islands are well reflected in their present day mtDNA pool. Although both archipelagos show identical diversity values, they are clearly different in their haplogroup content. Madeira displays a stronger sub-Saharan imprint, with haplogroups L1-L3 constituting about 13% of the lineages. Also, the relative frequencies of L sub-clusters in Madeira and mainland Portugal suggests that, at least in part, African presence in Madeira can be attributed to a direct gene flow from West Africa and not via Portugal. A comparison of the genetic composition of these two archipelagos with the Canary Islands, specially taking into account that their European source population was essentially from the Iberian Peninsula, testifies the stronger impact of the North African U6 cluster in the Canaries. This group is present in Madeira at a moderate frequency, but very reduced in the Açores. Nevertheless the recorded introduction of Canary native Guanches, who are characterized by the presence of particular sub-clade U6b1, has left no detectable imprints in the present day population of Madeira. info:eu-repo/semantics/publishedVersion |
format |
Article in Journal/Newspaper |
author |
Brehm, António Pereira, Luísa Kivisild, Toomas Amorim, António |
author_facet |
Brehm, António Pereira, Luísa Kivisild, Toomas Amorim, António |
author_sort |
Brehm, António |
title |
Mitochondrial portraits of the Madeira and Açores archipelagos witness different genetic pools of its settlers |
title_short |
Mitochondrial portraits of the Madeira and Açores archipelagos witness different genetic pools of its settlers |
title_full |
Mitochondrial portraits of the Madeira and Açores archipelagos witness different genetic pools of its settlers |
title_fullStr |
Mitochondrial portraits of the Madeira and Açores archipelagos witness different genetic pools of its settlers |
title_full_unstemmed |
Mitochondrial portraits of the Madeira and Açores archipelagos witness different genetic pools of its settlers |
title_sort |
mitochondrial portraits of the madeira and açores archipelagos witness different genetic pools of its settlers |
publisher |
Springer |
publishDate |
2003 |
url |
http://hdl.handle.net/10400.13/3046 https://doi.org/10.1007/s00439-003-1024-3 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
info:eu-repo/grantAgreement/FCT/POCTI/SFRH%2FBPD%2F7121%2F2001/PT Brehm, A., Pereira, L., Kivisild, T., & Amorim, A. (2003). Mitochondrial portraits of the Madeira and Açores archipelagos witness different genetic pools of its settlers. Human genetics, 114(1), 77-86. http://hdl.handle.net/10400.13/3046 doi:10.1007/s00439-003-1024-3 |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1007/s00439-003-1024-3 |
container_title |
Human Genetics |
container_volume |
114 |
container_issue |
1 |
container_start_page |
77 |
op_container_end_page |
86 |
_version_ |
1768371250508333056 |