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Horse domestication revolutionized warfare and accelerated travel, trade, and the geographic expansion of languages. Here, we present the largest DNA time series for a non-human organism to date, including genome-scale data from 149 ancient animals and 129 ancient genomes (>= 1-fold coverage), 87 of which are new. This extensive dataset allows us to assess the modem legacy of past equestrian civilisations. We find that two extinct horse lineages existed during early domestication, one at the far western (Iberia) and the other at the far eastern range (Siberia) of Eurasia. None of these contributed significantly to modern diversity. We show that the influence of Persian-related horse lineages increased following the Islamic conquests in Europe and Asia. Multiple alleles associated with elite-racing, including at the MSTN "speed gene," only rose in popularity within the last millennium. Finally, the development of modem breeding impacted genetic diversity more dramatically than the previous millennia of human management.
Fallstudien
(2005)
Der Beitrag beschreibt Grundsätze und mögliche Erträge für die Durchführung von Fallstudien im Bereich der Weiterbildung. Die forschungspraktische Durchführung selbst wird am Beispiel eines Forschungsprojekts aus dem Bereich Lernforschung beschrieben. Eingegangen wird vor allem auf die zentralen Phasen der Annäherung an das Forschungsfeld und die Interpretationsarbeit.