02383naa a2200277 a 450000100080000000500110000800800410001910000190006024501140007926000090019350001590020252014330036165000160179465000170181065000170182765000090184465000160185370000160186970000190188570000210190470000180192570000260194370000230196970000230199277300900201520422892017-05-24       2016    bl uuuu     u00u1 u    #d1 aDIAS, V. A. D.  aFrequencies of candidate genes and associations with carcass and meat traits in Nellore and crossbred cattle.  c2016  aTítulo em português: Frequências de genes candidatos e associações com características de carcaça e da carne em bovinos da raça Nelore e cruzados.  aThe objective of this work was to estimate allelic frequencies of the polymorphisms IGF2/MboII (G &gt T) of the insulin‑like growth factor 2 (IGF2) gene, DQ499531.1:g.134A &gt T of the pro‑melanin‑concentrating hormone (PMCH) gene, and DQ667048.1:g.3290G &gt T of the RAR‑related orphan receptor C (RORC) gene in beef cattle of different genetic groups, and to evaluate the associations between these polymorphisms and traits related to carcass composition and meat quality. Data on carcass and meat quality of 499 animals was used: of 313 Nellore (Bos indicus) and of 186 Nellore crossed with different taurine (Bos taurus) breeds. For the IGF2/MboII polymorphism, the frequencies found for the G allele were 0.231 and 0.631 for Nellore and crossed breeds, respectively. For the DQ499531.1:g.134A &gt T polymorphism, the allelic frequencies of A were 0.850 for Nellore and 0.905 for crossed breeds. For the DQ667048.1:g.3290G &gt T polymorphism, the allelic frequencies of G were 0.797 and 0.460 for Nellore and crossed breeds, respectively. The evaluated single nucleotide polymorphisms (SNPs) are not significantly associated with carcass and meat traits (rib eye area, back fat thickness, shear force, total lipids, and myofibrillar fragmentation index), suggesting little utility of the analyzed polymorphisms of the IGF2, PMHC, and RORC genes as selection markers in the studied cattle populations.  aBeef cattle  aBeef quality  aPolymorphism  aZebu  aBos indicus1 aCURI, R. A.1 aPEREIRA, G. L.1 aMALHEIROS, J. M.1 aESPIGOLAN, R.1 aALBUQUERQUE, L. G. de1 aCHARDULO, L. A. L.1 aOLIVEIRA, H. N. de  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 51, n. 2, p. 169-176, fev. 2016.