Malhado, C.H.M. Carneiro, P.L.S. Malhado, A.C.M. Martins Filho, R. Bozzi, R. Ladle, R.J. Genetic improvement and population structure of the Nelore breed in northern Brazil Subjects--Topical Terms: GADO NELOREPARÂMETRO GENÉTICOENDOGAMIARAÇA