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This article in

  1. Vol. 85 No. 11, p. 2801-2806
     
    Received: Dec 09, 2006
    Published: December 8, 2014


    2 Corresponding author(s): forrestr@lincoln.ac.nz
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doi:10.2527/jas.2006-806

Polymorphism at the ovine β3-adrenergic receptor locus (ADRB3) and its association with lamb mortality1

  1. R. H. Forrest*2,
  2. J. G. H. Hickford* and
  3. C. M. Frampton
  1. Agriculture and Life Sciences Division, PO Box 84, Lincoln University, Canterbury 7647, New Zealand; and
    Christchurch School of Medicine and Health Sciences, PO Box 4345, Christchurch, New Zealand

Abstract

The β3-adrenergic receptors (ADRB3) are guanine nucleotide-binding protein (G-protein)-coupled receptors predominantly found on the surface of adipocytes. They are major mediators of the lipolytic and thermogenic effects of high catecholamine concentrations, in particular norepinephrine. Recently, variation in the ovine β3-adrenergic receptor gene (ADRB3) has been associated with lamb survival in Merino sheep. In this study, PCR-single strand conformational polymorphism analysis of part of the ADRB3 intron was used to genotype 13,420 lambs (Borderdale, n = 351; Corriedale, n = 4,260; Coopworth, n = 1,225; Dorset Down, n = 663; Dorset Down × Coopworth, n = 264; Hampshire, n = 230; Merino, n = 4,488; Merino × Coopworth, n = 329; Merino × Polwarth, n = 226; Polwarth, n = 928; Poll Dorset, n = 241; and Suffolk, n = 215) born on 22 farms throughout the South Island of New Zealand. Univariate and multivariate odds ratios calculated for each of the 8 alleles revealed weak to moderate associations of the A and E alleles with cold survival and alleles C and F with cold-related mortality, and a strong association of the D allele with cold-related mortality and total mortality. This variation at the ADRB3 locus can possibly be exploited as a gene marker to increase selection accuracy when breeding for more cold-tolerant lambs.

Copyright © 2007. Copyright 2007 Journal of Animal Science