02055naa a2200313 a 450000100080000000500110000800800410001910000270006024500900008726000090017752010890018665000190127565000230129465000220131765300240133965300250136365300410138865300350142965300270146465300200149165300200151165300210153165300220155270000210157470000200159570000140161570000220162977300900165115716452009-10-19       2008    bl uuuu     u00u1 u    #d1 aSERENO, F. T. P. de S.  aGenetic diversity of Brazilian Pantaneiro horse and relationships among horse breeds.  c2008  aThe objective of this work was to evaluate the genetic diversity of Brazilian Pantaneiro horse by microsatellite markers, investigate the effect of genetic bottlenecks and estimate genetic differentiation among four horse breeds. Genetic variation was estimated through allele frequencies and mean breed heterozygosity. Nei´s genetic distances among the breeds Pantaneiro, Thoroughbred, Arabian, Spanish Pure Breed (Andalusian), and Uruguay Creole were calculated, and it was used to construct an UPGMA dendrogram. Clustering at different K values was calculated to infer population structure and assign individuals to populations. Nei´s distances showed a minimum distance between Pantaneiro horse and Spanish Pure Breed (0.228), and similar distances from Spanish Pure Breed to Thoroughbred and to Arabian (0.355 and 0.332). It was observed a great level of diversity, clear distance from Pantaneiro horse to other breeds, and genetic uniformity within breed. It was verified a certain level of substructure of Pantaneiro horse showing no influences from the other studied breeds.  aEquus Caballus  aMarcador Molecular  aRecurso Genético  aanimal conservation  aconservação animal  aconservação de recursos genéticos  agenetic resources conservation  amarcadores moleculares  amicrosatellites  aMicrossatélite  amicrossatélites  amolecular markers1 aSERENO, J. R. B.1 aVEGA-PLA, J. L.1 aKELLY, L.1 aBERMEJO, J. V. D.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 43, n. 5, p. 595-604, maio 2008.