Campus Units

Animal Science

Document Type

Article

Publication Version

Published Version

Publication Date

9-1-2013

Journal or Book Title

Poultry Science

Volume

92

Issue

9

First Page

2270

Last Page

2275

DOI

10.3382/ps.2013-03085

Abstract

Efficiency of production is increasingly important with the current escalation of feed costs and demands to minimize the environmental footprint. The objectives of this study were 1) to estimate heritabilities for daily feed consumption and residual feed intake and their genetic correlations with production and egg-quality traits; 2) to evaluate accuracies of estimated breeding values from pedigree- and marker-based prediction models; and 3) to localize genomic regions associated with feed efficiency in a brown egg layer line. Individual feed intake data collected over 2-wk trial periods were available for approximately 6,000 birds from 8 generations. Genetic parameters were estimated with a multitrait animal model; methods BayesB and BayesCπ were used to estimate marker effects and find genomic regions associated with feed efficiency. Using pedigree information, feed efficiency was found to be moderately heritable (h2 = 0.46 for daily feed consumption and 0.47 for residual feed intake). Hens that consumed more feed and had greater residual feed intake (lower efficiency) had a genetic tendency to lay slightly more eggs with greater yolk weights and albumen heights. Regions on chromosomes 1, 2, 4, 7, 13, and Z were found to be associated with feed intake and efficiency. The accuracy from genomic prediction was higher and more persistent (better maintained across generations) than that from pedigree-based prediction. These results indicate that genomic selection can be used to improve feed efficiency in layers.

Comments

This article is published as Wolc, Anna, Jesus Arango, Tomasz Jankowski, Petek Settar, Janet E. Fulton, Neil P. O'Sullivan, Rohan Fernando, Dorian J. Garrick, and Jack CM Dekkers. "Pedigree and genomic analyses of feed consumption and residual feed intake in laying hens." Poultry science 92, no. 9 (2013): 2270-2275. doi: 10.3382/ps.2013-03085.

Creative Commons License

Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.

Copyright Owner

Poultry Science Association Inc.

Language

en

File Format

application/pdf

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