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Association of SNPs with components of residual feed intake parameters in a meat-type chicken population

Thursday, August 21, 2014: 4:15 PM
Bayshore Grand Ballroom D (The Westin Bayshore)
Samuel E Aggrey , NutriGenomics Laboratory, Department of Poultry Science, University of Georgia, Athens, GA
Fernando Gonzalez-Ceron , NutriGenomics Laboratory, Department of Poultry Science, University of Georgia, Athens, GA
Romdhane Rekaya , Department of Animal and Dairy Science, University of Georgia, Athens, GA
Recorded Presentation (flv)
Abstract Text: Residual feed intake (RFI) has been the main biological measure of feed efficiency (FE). RFI consists of two efficiencies that are indistinguishable. We have dissected RFI maintenance (RFIM) and growth (RFIG). The heritability of RFIM and RFIG are moderate but negatively correlated. Selecting on RFIM will lead to smaller but efficient animals. Genetic gains in FE will be achieved by reductions in feed for maintenance. RFIG is not an efficiency parameter and should not be used as a sole criterion for selection. The ability of the current method to estimate efficiency values for maintenance and gain provides geneticists with additional parameters to discriminate between animals with similar RFIR. It also provides the flexibility to impose weights on RFIM and RFIG to meet a desired objective. RFI SNPs should be thoroughly evaluated because of the relationship between RFIM and RFIG.

Keywords:

residual feed intake

SNPs

chickens

See more of: Genetics of Trait Complexes - Feed Intake and Efficiency (Swine & Poultry)
See more of: Genetics of Trait Complexes: Feed intake and efficiency
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