| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
ANIMAL GENETICS |
* Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AB, T6G 2P5, Canada;
and
Igenity Livestock Production Business Unit, Merial Ltd.; and and
Agriculture and Agri-Food Canada Research Centre, Lacombe, Alberta, T4L 1W1 Canada
2 Corresponding author: stephen.moore{at}ualberta.ca
Genes that regulate metabolism and energy partitioning have the potential to influence economically important traits in farm animals, as do polymorphisms within these genes. In the current study, SNP in the bovine neuropeptide Y (NPY), growth hormone receptor (GHR), ghrelin (GHRL), uncoupling proteins 2 and 3 (UCP2 and UCP3), IGF2, corticotrophin-releasing hormone (CRH), cocaine and amphetamine regulated transcript (CART), melanocortin-4 receptor (MC4R), proopiomelanocortin (POMC), and GH genes were evaluated for associations with growth, feed efficiency, and carcass merit in beef steers. In total, 24 SNP were evaluated for associations with these traits and haplotypes were constructed within each gene when 2 or more SNP showed significant associations. An A/G SNP located in intron 4 of the GHR gene had the largest effects on BW of the animals (dominance effect P < 0.01) and feed efficiency (allele substitution effect P < 0.05). Another A/G SNP located in the promoter region of GHR had similar effects but the haplotypes of these 2 SNP reduced the effects of the SNP located in intron 4. Three SNP in the NPY gene showed associations to marbling (P < 0.001) as well as with ADG, BW, and feed conversion ratio (FCR; P < 0.05). The combination of these 3 SNP into haplotypes generally improved the association or had a similar scale of association as each single SNP. Only 1 SNP in UCP3, an A/G SNP in intron 3, was associated with ADG (P = 0.025), partial efficiency of growth, and FCR (P < 0.01). Three SNP in UCP2 gene were in almost complete linkage disequilibrium and showed associations with lean meat yield, yield grade, DMI, and BW (P < 0.05). Haplo-types between the SNP in UCP3 and UCP2 generally reduced the associations seen individually in each SNP. An A/G SNP in the GHRL gene tended to show effects on residual feed intake, FCR, and partial efficiency of growth (P < 0.10). The IGF2 SNP most strongly affected LM area (P < 0.01), back fat, ADG, and FCR (P < 0.05). The SNP in the CART, MC4R, POMC, GH, and CRH genes did not show associations at P < 0.05 with any of the traits. Although most of the SNP that showed associations do not cause amino acid changes, these SNP could be linked to other yet to be detected causative mutations or nearby QTL. It will be very important to verify these results in other cattle populations.
Key Words: candidate gene • cattle • feed efficiency • carcass merit • haplotype • single nucleotide polymorphism
This article has been cited by other articles:
|
|
 |
|
  S. Federica, N. Francesco, D. M. Giovanna, S. M. Carmela, C. Gennaro, T. Carmela, and M. Bianca Identification of Novel Single Nucleotide Polymorphisms in Promoter III of the Acetyl-CoA Carboxylase-{alpha} Gene in Goats Affecting Milk Production Traits J. Hered., May 1, 2009; 100(3): 386 - 389. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 G. J. Hausman, M. V. Dodson, K. Ajuwon, M. Azain, K. M. Barnes, L. L. Guan, Z. Jiang, S. P. Poulos, R. D. Sainz, S. Smith, et al. BOARD-INVITED REVIEW: The biology and regulation of preadipocytes and adipocytes in meat animals J Anim Sci, April 1, 2009; 87(4): 1218 - 1246. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. S. Moore, F. D. Mujibi, and E. L. Sherman Molecular basis for residual feed intake in beef cattle J Anim Sci, April 1, 2009; 87(14_suppl): E41 - E47. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. J. Garrett, G. Rincon, J. F. Medrano, M. A. Elzo, G. A. Silver, and M. G. Thomas Promoter region of the bovine growth hormone receptor gene: Single nucleotide polymorphism discovery in cattle and association with performance in Brangus bulls J Anim Sci, December 1, 2008; 86(12): 3315 - 3323. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S.-L Varvio, T Iso-Touru, J Kantanen, S Viitala, I Tapio, A Maki-Tanila, M Zerabruk, and J Vilkki Molecular anatomy of the cytoplasmic domain of bovine growth hormone receptor, a quantitative trait locus Proc R Soc B, July 7, 2008; 275(1642): 1525 - 1534. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
