Navigation Links
The first men and women from the Canary Islands were Berbers
Date:10/21/2009

A team of Spanish and Portuguese researchers has carried out molecular genetic analysis of the Y chromosome (transmitted only by males) of the aboriginal population of the Canary Islands to determine their origin and the extent to which they have survived in the current population. The results suggest a North African origin for these paternal lineages which, unlike maternal lineages, have declined to the point of being practically replaced today by European lineages.

Researchers from the University of La Laguna (ULL), the Institute of Pathology and Molecular Immunology from the University of Porto (Portugal) and the Institute of Legal Medicine from the University of Santiago de Compostela (USC) have studied the Y chromosome from human dental remains from the Canary Islands, and have determined the origin and evolution of paternal lineages from the pre-Hispanic era to the present day. To date, only mitochondrial DNA has been studied, which merely reflects the evolution of maternal lineages.

Rosa Fregal, the principal author of the recently-published study in BMC Evolutionary Biology, and a researcher from the Genetics Department of the ULL, explains to SINC that "whereas aboriginal maternal lineages have survived with a slight downward trend, aboriginal paternal lineages have declined progressively, being replaced by European lineages".

Experts have also analysed an historic sample for La Concepcin church (Tenerife), which dates back to the 17th and 18th centuries. With these data, they have established the impact of European colonisation and the African slave trade, and have determined the evolution of paternal lineages in aborigines from the Canary Islands or Guanches, from the pre-Hispanic era to the present day.

Although contribution is now mainly European, scientists state that North African and Sub-Saharan contribution was higher in the 17th and 18th centuries. The explanation as to why there is a difference between the lineages of men and women from the Canary Islands stems from the diverse contributions of parental populations, and, above all, as a result of European colonisation.

During this period, most relationships between men and women were between Iberian men and Guanches women, "due to the better social position of the former [Iberian men] compared to aboriginal males" Fregel explains. In addition to this, there was a higher mortality rate among male aborigines, who were displaced and discriminated against by conquerors. "Not only during the Crown of Castile Conquest in the 15th century, but also thereafter", the scientist affirms.

The researcher adds that in the case of Sub-Saharan lineages, both sexes were discriminated against equally, "and both maternal and paternal lineages have declined to date".

Traces of European colonisation

A previous study of the Y chromosome in the current population of the Canary Islands demonstrated the impact of European colonisation on the male population in the Canary Islands, Fregal points out that "When estimating the proportion of European lineages present in the current population of the Canary Islands, it was found that they represented more than 90%". Nevertheless, mitochondrial DNA studies in the current population demonstrated a notable survival of aboriginal lineages, where European contribution is between 36% and 62%.

Iberian and European contribution to male genetic patrimony in the Canary Islands increased from 63% during the 17th and 18th centuries to 83% in the present day. At the same time, male aboriginal genes decreased from 31% to 17%, and Sub-Saharan genes, from 6% to 1%.

As for women, European contribution is more constant, having moved from 48% to 55%, and aboriginal contribution, from 40% to 42%. The only decline observed in genetic contribution, from 12% to 3% in the last three centuries, has been in the case of Sub-Saharans.

Despite these advances, there are still mysteries to solve, such as how to determine whether the first inhabitants of the Canary Islands arrived by their own means or whether they were brought by force, "as there are no signs to ascertain whether they were aware of the navigation or if they came in one or several waves", Fregal concludes.


'/>"/>

Contact: SINC
info@plataformasinc.es
34-914-251-820
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

Related biology news :

1. Which came first, the moth or the cactus?
2. First all-African GM crop is resistant to maize streak virus
3. Scientists retrace evolution with first atomic structure of an ancient protein
4. CU-Boulder team discovers first ancient manioc fields in Americas
5. First finding of a metabolite in 1 sex only
6. First orchid fossil puts showy blooms at some 80 million years old
7. First individual genome sequence published
8. U of M begins nations first clinical trial using T-reg cells from cord blood in leukemia treatment
9. UNH becomes first university in nation to use landfill gas as primary energy source
10. Scientists in first global study of poison gas in the atmosphere
11. Weight gain between first and second pregnancies associated with increased odds of male second child
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
The first men and women from the Canary Islands were Berbers
(Date:1/25/2016)... Pa. , Jan. 25, 2016   Unisys Corporation ... system at John F. Kennedy (JFK) International Airport, New ... Protection (CBP) identify imposters attempting to enter the ... not belong to them. pilot testing of the ... initially at three terminals at JFK during January 2016. --> ...
(Date:1/22/2016)... DUBLIN , Jan. 22, 2016 /PRNewswire/ ... announced the addition of the "Global ... report to their offering. --> ... of the "Global Biometrics Market in ... offering. --> Research and ...
(Date:1/20/2016)... 2016   MedNet Solutions , an innovative SaaS-based ... clinical research, is pleased to announce the attainment of ... the result of the company,s laser focus on (and ... , it,s comprehensive, easy-to-use and highly affordable cloud-based technology ... Key MedNet growth achievements in 2015 include: ...
Breaking Biology News(10 mins):
(Date:2/11/2016)... and GERMANTOWN, Maryland , ... Frankfurt Prime Standard: QIA) today announced the introduction of ... gene expression profiling, expanding QIAGEN,s portfolio of Sample to ... researchers to select from over 20,000 human genes and ... between genes, cellular phenotypes and disease processes. --> ...
(Date:2/11/2016)... ... February 11, 2016 , ... ... focused on the development and manufacture of biopharmaceuticals and therapeutics, announces an ... the 2016 BioProcess International Awards – Recognizing Excellence in the People, Organizations ...
(Date:2/11/2016)... Buffalo, New York (PRWEB) , ... February 11, ... ... and analytical instruments for more than 150 years, continues today to pursue the ... to its line of analytical instruments: the AR9 Refractometer and the AR5 Refractometer. ...
(Date:2/10/2016)... Early-career researchers from ... , Uganda and Yemen ... nutrition   Indonesia , Nepal ... Yemen are being honored for their accomplishments in ... celebrated for mentoring young women scientists who are pursuing careers in agriculture, ...
Breaking Biology Technology: