01686naa a2200253 a 450000100080000000500110000800800410001910000160006024500590007626000090013552009180014465000340106265000140109665300110111065300170112170000140113870000190115270000140117170000170118570000180120270000170122070000220123777301730125915333612007-09-20       2006    bl uuuu     u00u1 u    #d1 aMcMANUS, C.  aSelection objectives for hair sheep in central Brazil.  c2006  aThree production based systems (A, B and C) for sheep were studied to determine economic weights of important traits. Receipts and costs were simulated using an economic simulator to calculate the structure of the Operational Costs. Only characteristics that were responsible for more than 10% of the profit were studied, which included: number of weaned lambs, food consumption (ewe and lamb), weight of carcass and weight of female lambs sold for reproduction. Independent of the index used (profitability or yield) or system (A, B or C), the economic weights are larger for the number of lambs weaned per ewe. The better the system (A to C) the lesser the importance of this trait and lamb growth increased and weight of female for slaughter decreased in importance. Changes in herd structure had little influence on economic values, whereas (co)variances were important sources of change in selection indices.  aMelhoramento Genético Animal  aSeleção  aBrasil  aOvino lanado1 aPINTO, B.1 aLOUVANDINI, H.1 aPAIVA, S.1 aSILVA, A. V.1 aGARCIA, J. A.1 aSANTO, E. S.1 aMARTINS, R. F. S.  tIn: WORLD CONGRESS ON GENETICS APPLIED TO LIVESTOCK PRODUCTION, 8., 2006, Belo Horizonte, MG. Proceedings... Belo Horizonte: Instituto Prociência, 2006. 4 f. 1 CD-ROM.