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The mules that are not mules - metrics, morphology, archaeogenomics and mtDNA d-loop diversity in equids from Roman Switzerland

Granado, José D. and Dill, Nadine and Gaunitz, Charleen and Fages, Antoine and Khan, Naveed and Schernig Mráz, Monica and Deschler-Erb, Sabine and Orlando, Ludovic and Schlumbaum, Angela. (2020) The mules that are not mules - metrics, morphology, archaeogenomics and mtDNA d-loop diversity in equids from Roman Switzerland. Journal of Archaeological Science, 123. p. 105253.

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Official URL: https://edoc.unibas.ch/80027/

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Abstract

Mules (Equus asinus x Equus caballus) represent first-generation hybrids between a female horse (mare) and a male donkey (jack). They are generally considered to have first appeared north of the Alps with Roman influence, a time period in which written and iconographic sources support their key role for transport and traction, both in farming and the military. The archaeozoological evidence for mules is, however, contentious as faunal assemblages are difficult to assign to either parental species or hybrids based on morphometric data alone. Here we leverage low-coverage DNA sequence data and Zonkey computational analyses to assess the occurrence of mules within Roman equid faunal assemblages in the alpine foreland. While morphological data previously assigned 17 remains to mules, successful DNA analysis of 12 remains revealed that 11 were in fact horses, one female and ten males. Eight mtDNA d-loop haplogroups were identified and genetic diversity within Roman equids corresponds to non-threatened modern local breeds. Two remains genetically identified as mules belonged to haplogroups F and I. Our results suggest that the importance of mules in the Roman archaeological record of the alpine foreland, and probably elsewhere, may have been previously over-estimated. Whether this is true for other regions of the Roman Empire needs to be evaluated. Further genomic testing for equid species and their hybrids and molecular sexing will improve our knowledge on this important issue.
Faculties and Departments:04 Faculty of Humanities and Social Sciences > Departement Altertumswissenschaften > Fachbereich Ur- und Frühgeschichte und Provinzialrömische Archäologie > Vindonissa Professur Provinzialrömische Archäologie (Schwarz)
05 Faculty of Science > Departement Umweltwissenschaften > Integrative Biologie > Integrative Prähistorische und Naturwissenschaftliche Archäologie (IPNA)
UniBasel Contributors:Deschler-Erb, Sabine and Granado, José and Schernig, Monika and Schlumbaum, Angela and Dill, Nadine
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Elsevier
ISSN:0305-4403
e-ISSN:1095-9238
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:17 Jan 2021 14:38
Deposited On:17 Jan 2021 14:38

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