01810naa a2200277 a 450000100080000000500110000800800410001910000220006024500890008226000090017150001190018052008860029965000150118565000250120065300230122565300300124865300230127865300190130165300220132070000230134270000220136570000220138770000140140970000170142377300920144018733512018-05-08       2010    bl uuuu     u00u1 u    #d1 aMALHADO, C. H. M.  aGenetic improvement and population structure of the Nelore breed in Northern Brazil.  c2010  aTítulo em português: Melhoramento genético e estrutura populacional da Raça Nelore na Região Norte do Brasil.  aThe objective of this work was to evaluate the population structure and the genetic and phenotypic progress of Nelore cattle in Northern Brazil. Pedigree information concerning animals born between 1942 and 2006 were analyzed. Population structure was performed using the Endog program. average relatedness coefficients were low: 0.2 and 0.13%, respectively. However,The effective number of founders was 370 and the genetic contribution of 10, 50 and 448 most influent ancestors explained 13.2, 28 and 50% of the genetic variability in the population, respectively. The genetic variability for growth traits and population structure demonstrates high probability of increasing productivity through selective breeding. Moreover, management strategies to reduce the currently observed age at first calving and generation intervals are important for Nelore cattle genetic improvement.  aInbreeding  aParâmetro Genético  aBos taurus indicus  aEffective population size  aGenetic parameters  aGenetic trends  aPedigree analysis1 aCARNEIRO, P. L. S.1 aMALHADO, A. C. M.1 aMARTINS FILHO, R.1 aBOZZI, R.1 aLADLE, R. J.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 45, n. 10, p. 1109-1116, out. 2010