Genome-wide association studies of preweaning growth and in vivo carcass composition traits in Esme sheep


YILMAZ O., Kizilaslan M., Arzik Y., Behrem S., Ata N., KARACA O., ...More

JOURNAL OF ANIMAL BREEDING AND GENETICS, vol.139, no.1, pp.26-39, 2022 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 139 Issue: 1
  • Publication Date: 2022
  • Doi Number: 10.1111/jbg.12640
  • Journal Name: JOURNAL OF ANIMAL BREEDING AND GENETICS
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, Agricultural & Environmental Science Database, BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, EMBASE, Food Science & Technology Abstracts, MEDLINE, Veterinary Science Database
  • Page Numbers: pp.26-39
  • Keywords: carcass composition, growth, GWAS, QTL, sheep, LOCI, EXPRESSION, FAMILY, SCAN

Abstract

Sheep are considered as a major contributor of global food security. Moreover, sheep preweaning growth traits as well as in vivo carcass composition traits such as ultrasonic measurements of Longissimus dorsi muscle depth (UMD) and back-fat thickness (UFD) are crucially important indicators of meat yield and hot carcass composition. Despite their relative importance for productivity and profitability of a sheep production system, detected QTL for these traits are quite scarce. Therefore, we implemented GWAS for these traits using animal mixed model-based association approach provided by GenABEL in Esme sheep. Three genome-wide and 14 individual chromosome-wide associated SNPs were discovered. As a result, ESRP1, LOC105613082, ZNF641, DUSP5, TEAD1, SMOX, PTPRT, RALYL, POM121C, PHIP, LOC101106051, ZIM3, PEG3, TRPC7, FBXL4, LOC105610397, LOC105616489 and DNAAF2 were suggested as candidates. Some of the discovered genes and involved pathways were already annotated to contribute growth and development in various species including human, mice and cattle. All in all, the results of this study are expected to strongly contribute to shed a light on the underlying molecular mechanisms behind growth and carcass composition traits, with potential implications on studies aiming faster genetic improvement, targeted low-resolution SNP panel designs and genome-editing studies.