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.
CONCLUSION:
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.
