Pleiotropic Genes Affecting Carcass Traits in Bos indicus (Nellore) Cattle Are Modulators of Growth

PLoS One. 2016 Jul 13;11(7):e0158165. doi: 10.1371/journal.pone.0158165. eCollection 2016.

Abstract

Two complementary methods, namely Multi-Trait Meta-Analysis and Versatile Gene-Based Test for Genome-wide Association Studies (VEGAS), were used to identify putative pleiotropic genes affecting carcass traits in Bos indicus (Nellore) cattle. The genotypic data comprised over 777,000 single-nucleotide polymorphism markers scored in 995 bulls, and the phenotypic data included deregressed breeding values (dEBV) for weight measurements at birth, weaning and yearling, as well visual scores taken at weaning and yearling for carcass finishing precocity, conformation and muscling. Both analyses pointed to the pleomorphic adenoma gene 1 (PLAG1) as a major pleiotropic gene. VEGAS analysis revealed 224 additional candidates. From these, 57 participated, together with PLAG1, in a network involved in the modulation of the function and expression of IGF1 (insulin like growth factor 1), IGF2 (insulin like growth factor 2), GH1 (growth hormone 1), IGF1R (insulin like growth factor 1 receptor) and GHR (growth hormone receptor), suggesting that those pleiotropic genes operate as satellite regulators of the growth pathway.

MeSH terms

  • Animals
  • Body Weight / genetics
  • Breeding
  • Cattle / genetics*
  • Cattle / growth & development*
  • Female
  • Genome-Wide Association Study / veterinary
  • Male
  • Polymorphism, Single Nucleotide

Grants and funding

This research was supported by: National Counsel of Technological and Scientific Development (CNPq—http://www.cnpq.br/) (process 560922/2010-8 and 483590/2010-0); and São Paulo Research Foundation (FAPESP—http://www.fapesp.br/) (process 2014/01095-8 and 2013/02552-0). Gensys Consultores Associados and Recombinetics, Inc provided support in the form of salaries for authors HHRN and TSS, but did not have any additional role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. The specific roles of these authors are articulated in the ‘author contributions’ section.