%0 Journal Article %T The genetic diversity and structure of 18 sheep breeds exposed to isolation and selection. %A Ćurković M %A Ramljak J %A Ivanković S %A Mioč B %A Ivanković A %A Pavić V %A Brka M %A Veit-Kensch C %A Medugorac I %J J Anim Breed Genet %V 133 %N 1 %D Feb 2016 %M 25891190 %F 3.271 %R 10.1111/jbg.12160 %X The phylogenetic layout of the genotyped (30 microsatellite) 18 sheep breeds in this study demands and provides the opportunity to evaluate both neutral and adaptive components of genetic diversity in a naturally and artificially selected and subdivided sheep population. Seven Pramenka strains from Bosnia and Herzegovina and Croatia characterized by a very low intensity of artificial selection, preserved the highest neutral genetic variability. Eight central and north-western European breeds under considerable artificial isolation and selection preserved the lowest genetic variability. Only combinations of various phylogenetic parameters offer a reasonable explanation for underlying evolutionary forces working in the investigated island and mainland sheep breeds under variable natural and artificial selection. More than 60% of total genetic, diversity was allocated to virtually unselected Pramenka strains, and an additional 25% to native moderately selected Graue Gehoernte Heidschnucke and intensively selected Ostfriesische Milchschafe. Some economically very important breeds and strains did not contribute to a pool with maximal genetic diversity, while they play an important role in the cultural heritage of respective countries.