02508naa a2200289 a 450000100080000000500110000800800410001902400520006010000230011224501470013526000090028252016210029165000110191265000200192365000130194365000210195665300270197770000180200470000160202270000220203870000230206070000190208370000190210270000250212170000250214677300470217121549722023-08-22       2023    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1007/s00335-023-10009-02DOI1 aROCHA, R. de F. B.  aSingle-step genome-wide association studies and post-GWAS analyses for the number of oocytes and embryos in Gir cattle.h[electronic resource]  c2023  aGenome-Wide Association Studies (GWAS) are used for identifcation of quantitate trait loci (QTL) and genes associated with several traits. We aimed to identify genomic regions, genes, and biological processes associated with number of total and viable oocytes, and number of embryos in Gir dairy cattle. A dataset with 17,526 follicular aspirations, including the following traits: number of viable oocytes (VO), number of total oocytes (TO), and number of embryos (EMBR) from 1641 Gir donors was provided by fve diferent stock farms. A genotype fle with 2093 animals and 395,524 SNP markers was used to perform a single-step GWAS analysis for each trait. The top 10 windows with the highest percentage of additive genetic variance explained by 100 adjacent SNPs were selected. The genomic regions identifed in our work were overlapped with QTLs from QTL database on chromosomes 1, 2, 5, 6, 7, 8, 9, 13, 17, 18, 20, 21, 22, 24, and 29. These QTLs were classifed as External, Health, Meat and carcass, Production or Reproduction traits, and about 38% were related to Reproduction. In total, 117 genes were identifed, of which 111 were protein-coding genes. Exclusively associations were observed for 42 genes with EMBR, and 1 with TO. Also, 42 genes were in common between VO and TO, 28 between VO and EMBR, and four genes were in common among all traits. In conclusion, great part of the identifed genes plays a functional role in initial embryo development or general cell functions. The protein-coding genes ARNT, EGR1, HIF1A, AHR, and PAX2 are good markers for the production of oocytes and embryos in Gir cattle.  aBovino  aEmbrião Animal  aGado Gir  aGenética Animal  aAssociação genômica1 aGARCIA, A. O.1 aOTTO, P. I.1 aSANTOS, M. G. dos1 aSILVA, M. V. G. B.1 aMARTINS, M. F.1 aMACHADO, M. A.1 aPANETTO, J. C. do C.1 aGUIMARÃES, S. E. F.  tMammalian Genomegv. 34, p. 497-508, 2023.