01529nam a2200181 a 450000100080000000500110000800800410001910000160006024500950007626001480017152009150031965300180123465300340125265300110128670000160129770000160131370000180132910619282021-03-31       2014    bl uuuu     u01u1 u    #d1 aTSURUTA, S.  aGenome wide association study on cow mortality in three US regions.h[electronic resource]  aIn: Proceedings of the World Congress on Genetics Applied to Livestock Production, 10., Vancouver, BC, Canada, August 17-22, 2014. p.805.c2014  aABSTRACT. Our objective was to conduct a genome-wide association study on cow mortality and 305-d milk yield for three lactations and determine if there were differences in the genetic architecture in three US regions. Genomic EBV of mortality and milk yield were estimated with a single-step genomic BLUP using a threshold-linear model. Genomic information was included on 34,506 bulls. Data consisted of the entire US data and three regions SE: southeast, SW: southwest, and NE: northeast for first three lactation cows calving from 1999 to 2008. As expected, a segment on chromosome 14 was significantly associated with milk production in all regions. Chromosome 14 showed a strong association with the first parity mortality for the entire US, with NE showing a strong association for all three parities. Within SE and SW regions, no single region stood out for mortality on chromosomes for three parities.  aCow mortality  aGenome wide association study  aRegion1 aMISZTAL, I.1 aAGUILAR, I.1 aLAWLOR, T. J.