Contributions to diversity rather than basic measures of genetic diversity characterise the spreading of donkey throughout the American continent

摘要: Donkey was introduced into the Americas soon after its discovery in 15th century. However, there is no historical consensus on how they spread across continent. In a previous study, two distinct genetic pools (Clusters A -Southern part - and B -Northern of South America Central America) were identified, with likely confluence Colombia. The aim this study to evaluate whether main diversity parameters, such as gene (GD) allelic richness (k), or relative contributions various breeds these parameters are useful indicators give support information putative routes spreading donkeys American full agreement sources suggesting that Greater Antilles first breeding nucleus, both total (gGDT) (CT(k)) showed higher ability identify "abundant centre" species Continent. Even though reports entry points donkey continent (e.g. Brazil), suggested that, our dataset, Cuban population more representative nucleus species. populations surroundings Caribbean Gulf would be early derivatives Antillean donkey. strong North-South structure confirmed for metapopulation. Current analyses suggest classified Cluster (South) essentially sample background (North). Andean route had highest importance formation populations. extinction either belonging could lead decrease overall at level (negative gGDT values) (positive CT(k) contributions). opposite pattern found A. roughly 8% dramatically affect number alleles metapopulation (19.1%). increase by 2.2%. Although, scenario each individual varies substantially, joint conservation Clusters highly advised.