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Title: Farmer fidelity in the Canary Islands revealed by ancient DNA from prehistoric seeds
Authors: Hagenblad, Jenny
Morales Mateos, Jacob 
Leino, Matti W.
Rodríguez Rodríguez, Amelia 
UNESCO Clasification: 550501 Arqueología
2417 Biología vegetal (botánica)
Keywords: aDNA
Barley (Hordeum vulgare)
Crop evolution
Landrace, et al
Issue Date: 2017
Journal: Journal of Archaeological Science 
Abstract: The Canary Islands were settled in the first millennium AD by colonizers likely originating from North Africa. The settlers developed a farming economy with barley as the main crop. Archaeological evidence suggests the islands then remained isolated until European sea-travellers discovered and colonized them during the 14th and 15th centuries. Here we report a population study of ancient DNA from twenty-one archaeobotanical barley grains from Gran Canaria dating from 1050 to 1440 cal AD. The material showed exceptional DNA preservation and genotyping was carried out for 99 single nucleotide markers. In addition 101 extant landrace accessions from the Canary Islands and the western Mediterranean were genotyped. The archaeological material showed high genetic similarity to extant landraces from the Canary Islands. In contrast, accessions from the Canary Islands were highly differentiated from both Iberian and North African mainland barley. Within the Canary Islands, landraces from the easternmost islands were genetically differentiated from landraces from the western islands, corroborating the presence of pre-Hispanic barley cultivation on Lanzarote. The results demonstrate the potential of population genetic analyses of ancient DNA. They support the hypothesis of an original colonization, possibly from present day Morocco, and subsequent isolation of the islands and reveal a farmer fidelity to the local barley that has lasted for centuries.
ISSN: 0305-4403
DOI: 10.1016/j.jas.2016.12.001
Source: Journal of Archaeological Science [ISSN 0305-4403], v. 78, p. 78-87
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