title: Validation of selection accuracy for the total number of piglets born in Landrace pigs using genomic selection.
abstract: OBJECTIVE
  This study was to determine the relationship between estimated breeding value and phenotype information after farrowing when juvenile selection was made in candidate pigs without phenotype information.
  
  
  METHODS
  After collecting phenotypic and genomic information for the total number of piglets born by Landrace pigs, selection accuracy between genomic breeding value estimates using genomic information and breeding value estimates of best linear unbiased prediction (BLUP) using conventional pedigree information were compared.
  
  
  RESULTS
  Genetic standard deviation (σa) for the total number of piglets born was 0.91. Since the total number of piglets born for candidate pigs was unknown, the accuracy of the breeding value estimated from pedigree information was 0.080. When genomic information was used, the accuracy of the breeding value was 0.216. Assuming that the replacement rate of sows per year is 100% and generation interval is 1 year, genetic gain per year is 0.346 head when genomic information is used. It is 0.128 when BLUP is used.
  
  
  CONCLUSIONS
  Genetic gain estimated from single step best linear unbiased prediction (ssBLUP) method is by 2.7 times higher than that the one estimated from BLUP method, i.e., 270% more improvement in efficiency.
authors: Department of Animal Biotechnology, Chonbuk National University, Jeonju 54896, Korea.
authors: Jae-Don
authors: JD
authors: Oh
authors: Department of Animal Biotechnology, Chonbuk National University, Jeonju 54896, Korea.
authors: Chong-Sam
authors: CS
authors: Na
authors: Department of Animal Biotechnology, Chonbuk National University, Jeonju 54896, Korea.
authors: Kyung-Do
authors: KD
authors: Park
keywords: Genomic Selection; Landrace; Total Number of Piglets Born