| Summary: | (1) Background. Merino is a worldwide sheep breed well known for the quality and quantity of its wool. If there is no doubt that it originates from the Mediterranean Basin and that human selection took place in southern Spain, the populations that potentially contributed to the building of this breed are a matter of debate. Here, we tested whether a Moroccan breed settled on the North Atlantic coast, the Beni Ahsen, could be a good candidate, given the thickness and distribution of fleece covering the head and legs. (2). Methods. Using the control region of the mtDNA, 20 Beni Ahsen sequences were considered in a dataset of 643, including Mediterranean Merino and non-Merino breeds. Unfortunately, the Beni Ahsen is an endangered breed because of a lack of interest from the breeders. (3) Results. European Merino-derived breeds are divided into an Iberian and an Italian cluster, more linked to non-Merino breeds of the same country than between Merino themselves. Beni Ahsen breed is strongly linked to the other Moroccan breeds but shows the greatest number of connections with Merino-derived breeds, especially from Iberia. Interestingly, several other Moroccan breeds are also connected to Iberian Merino.
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