Fig. 4

STRUCTURE analysis (admixture model) for a all Nile tilapia samples investigated (optimal cluster K = 2, suboptimal clusters K = 11 and K = 13) and b excluding the most divergent populations from Omo-Turkana (Gilgel Gibe, Turkana) and Lake Tana (optimal cluster K = 2, suboptimal clusters K = 8). Each bar representing a single individual, and each colour representing proportion of membership (population) with regard to each genetic cluster