Abstract
ObjectiveThis 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.MethodsAfter 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.ResultsGenetic 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.ConclusionGenetic 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.
Highlights
Oh et al (2017) Asian-Australas J Anim Sci 30:149-153 method, genomic best linear unbiased prediction (GBLUP) method, and single step best linear unbiased prediction [2,8]
This experiment was conducted to compare the selection accuracy between genomic breeding value estimation using genomic information and breeding value estimation of BLUP using conventional pedigree information after collecting phenotypic and genomic information for the total number of piglets born in Landrace pigs
The relationship between estimated breeding value and phenotype information after farrowing was investigated when juvenile selection was made in candidate pigs without phenotype information
Summary
Oh et al (2017) Asian-Australas J Anim Sci 30:149-153 method (uses pedigree and performance test information for estimation), genomic best linear unbiased prediction (GBLUP) method (uses only genomic information of individual pigs for the estimation), and single step best linear unbiased prediction (ssBLUP, in which all information of individuals with or without genomic information are included in one model for the analysis) [2,8]. It has been reported that the estimation was more accurate when genomic information is used than when only pedigree information is used for animals without genomic information. SsBLUP was more accurate than BLUP for genetic estimation [2,8]. This experiment was conducted to compare the selection accuracy between genomic breeding value estimation using genomic information and breeding value estimation of BLUP using conventional pedigree information after collecting phenotypic and genomic information for the total number of piglets born in Landrace pigs. The relationship between estimated breeding value and phenotype information after farrowing was investigated when juvenile selection was made in candidate pigs without phenotype information
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