02867naa a2200469 a 450000100080000000500110000800800410001910000190006024500860007926000090016552015950017465000090176965000160177865000110179465000170180565000280182265000090185065000180185965300360187765300230191370000180193670000180195470000200197270000210199270000170201370000190203070000200204970000150206970000220208470000190210670000220212570000180214770000230216570000170218870000200220570000230222570000180224870000170226670000160228370000260229977300720232519803642018-02-22       2013    bl uuuu     u00u1 u    #d1 aTIZIOTO, P. C.  aGenome scan for meat quality traits in Nelore beef cattle.h[electronic resource]  c2013  aGenome scan for meat quality traits in Nelore beef cattle. Physiol Genomics 45: 1012?1020, 2013. First published September 10, 2013; doi:10.1152/physiolgenomics.00066.2013.?Meat quality traits are economically important because they affect consumers? acceptance, which, in turn, influences the demand for beef. However, selection to improve meat quality is limited by the small numbers of animals on which meat tenderness can be evaluated due to the cost of performing shear force analysis and the resultant damage to the carcass. Genome wide-association studies for Warner-Bratzler shear force measured at different times of meat aging, backfat thickness, ribeye muscle area, scanning parameters [lightness, redness (a*), and yellowness] to ascertain color characteristics of meat and fat, water-holding capacity, cooking loss (CL), and muscle pH were conducted using genotype data from the Illumina BovineHD BeadChip array to identify quantitative trait loci (QTL) in all phenotyped Nelore cattle. Phenotype count for these animals ranged from 430 to 536 across traits. Meat quality traits in Nelore are controlled by numerous QTL of small effect, except for a small number of large-effect QTL identified for a*fat, CL, and pH. Genomic regions harboring these QTL and the pathways in which the genes from these regions act appear to differ from those identified in taurine cattle for meat quality traits. These results will guide future QTL mapping studies and the development of models for the prediction of genetic merit to implement genomic selection for meat quality in Nelore cattle.  aBeef  aBeef cattle  aCattle  aMeat quality  aQuantitative trait loci  aZebu  aGado de Corte  aGenome wide-association studies  aQualidade da carne1 aDECKER, J. E.1 aTAYLOR, J. F.1 aSCHNABEL, R. D.1 aMUDADU, M. de A.1 aSILVA, F. L.1 aMOURÃO, G. B.1 aCOUTINHO, L. L.1 aTHOLON, P.1 aSONSTEGARD, T. S.1 aROSA, A. do N.1 aALENCAR, M. M. de1 aTULLIO, R. R.1 aMEDEIROS, S. R. de1 aNASSU, R. T.1 aFEIJO, G. L. D.1 aSILVA, L. O. C. da1 aTORRES, R. A.1 aSIQUEIRA, F.1 aHIGA, R. H.1 aREGITANO, L. C. de A.  tPhysiological Genomicsgv. 45, n. 21, p. 1012-1020, September 2013.