title: Association of a region of bovine chromosome 1 (BTA1) with age at puberty in Angus bulls.
abstract: Age at puberty is an important component of reproductive performance in cattle, so it is important to identify genes that contribute to the regulation of the onset of puberty and polymorphisms that explain differences between bulls. In a previous study, we found putative associations between age at puberty in Angus bulls and single-nucleotide polymorphisms (SNPs) in Chromosomes 1 and X. In the present work we aimed to confirm these findings in a larger sample of Angus bulls (n = 276). Four SNPs located in these regions were genotyped using SEQUENOM technology and the genotypes obtained were tested for association with age at puberty. The results showed that SNPs rs135953349 and rs110604205 on BTA1 were still significantly associated with age of puberty estimated at progressive sperm motility of 10% (P < 0.05). The association previously found on Chromosome X could not be confirmed. Analysis of the bovine genome revealed that the associated region (99.17-99.99 Mb) contained four predicted loci: myelodysplasia syndrome 1 (MDS1) and ecotropic virus integration site 1 (EVI1) complex locus (MECOM), eGF-like and EMI domain-containing 1 pseudogene-like (LOC100337483), microRNA mir-551b (MIR551B) and mCG140927-like (LOC100139843). The results obtained could contribute to the understanding of puberty regulation and could be useful for further identification and annotation of gene function in the context of reproduction.
authors.affiliation: Instituto de Genética Veterinaria (IGEVET), CCT La Plata - CONICET - Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 s/n, La Plata B1900AVW, CC 296, Argentina.
authors.forename: María E
authors.initials: ME
authors.lastname: Fernández
authors.affiliation: Departamento de Producción Animal, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 s/n, La Plata B1900AVW, CC 296, Argentina.
authors.forename: Alberto
authors.initials: A
authors.lastname: Prando
authors.affiliation: Instituto de Genética Veterinaria (IGEVET), CCT La Plata - CONICET - Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 s/n, La Plata B1900AVW, CC 296, Argentina.
authors.forename: Andrés
authors.initials: A
authors.lastname: Rogberg-Muñoz
authors.affiliation: Instituto de Genética Veterinaria (IGEVET), CCT La Plata - CONICET - Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 s/n, La Plata B1900AVW, CC 296, Argentina.
authors.forename: Pilar
authors.initials: P
authors.lastname: Peral-García
authors.affiliation: Departamento de Producción Animal, Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 s/n, La Plata B1900AVW, CC 296, Argentina.
authors.forename: Andrés
authors.initials: A
authors.lastname: Baldo
authors.affiliation: Instituto de Genética Veterinaria (IGEVET), CCT La Plata - CONICET - Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 s/n, La Plata B1900AVW, CC 296, Argentina.|Corresponding author. Email: ggiovam@fcv.unlp.edu.ar.
authors.forename: Guillermo
authors.initials: G
authors.lastname: Giovambattista
authors.affiliation: Instituto de Genética Veterinaria (IGEVET), CCT La Plata - CONICET - Facultad de Ciencias Veterinarias, Universidad Nacional de La Plata, Calle 60 y 118 s/n, La Plata B1900AVW, CC 296, Argentina.
authors.forename: Juan P
authors.initials: JP
authors.lastname: Lirón
keywords: gene; genetics; genotyping; livestock; polymorphism