Asian-Australas J Anim Sci. 2013 Apr;26(4):470-5. doi: 10.5713/ajas.2012.12454.

Genetic parameter estimation in seedstock Swine population for growth performances.

Asian-Australasian journal of animal sciences

Jae Gwan Choi, Chung Il Cho, Im Soo Choi, Seung Soo Lee, Tae Jeong Choi, Kwang Hyun Cho, Byoung Ho Park, Yun Ho Choy

PMID: 25049811 PMCID: PMC4093385 DOI: 10.5713/ajas.2012.12454

Abstract

The objective of this study was to estimate genetic parameters that are to be used for across-herd genetic evaluations of seed stock pigs at GGP level. Performance data with pedigree information collected from swine breeder farms in Korea were provided by Korea Animal Improvement Association (AIAK). Performance data were composed of final body weights at test days and ultrasound measures of back fat thickness (BF), rib eye area (EMA) and retail cut percentage (RCP). Breeds of swine tested were Landrace, Yorkshire and Duroc. Days to 90 kg body weight (DAYS90) were estimated with linear function of age and ADG calculated from body weights at test days. Ultrasound measures were taken with A-mode ultrasound scanners by trained technicians. Number of performance records after censoring outliers and keeping records pigs only born from year 2000 were of 78,068 Duroc pigs, 101,821 Landrace pigs and 281,421 Yorkshire pigs. Models included contemporary groups defined by the same herd and the same seasons of births of the same year, which was regarded as fixed along with the effect of sex for all traits and body weight at test day as a linear covariate for ultrasound measures. REML estimation was processed with REMLF90 program. Heritability estimates were 0.40, 0.32, 0.21 0.39 for DAYS90, ADG, BF, EMA, RCP, respectively for Duroc population. Respective heritability estimates for Landrace population were 0.43, 0.41, 0.22, and 0.43 and for Yorkshire population were 0.36, 0.38, 0.22, and 0.42. Genetic correlation coefficients of DAYS90 with BF, EMA, or RCP were estimated to be 0.00 to 0.09, -0.15 to -0.25, 0.22 to 0.28, respectively for three breeds populations. Genetic correlation coefficients estimated between BF and EMA was -0.33 to -0.39. Genetic correlation coefficient estimated between BF and RCP was high and negative (-0.78 to -0.85) but the environmental correlation coefficients between these two traits was medium and negative (near -0.35), which describes a highly correlated genetic response to selection on one or the other of these traits. Genetic Trends of all three breeds tend to be towards bigger EMA or greater RCP and shorter DAYS90 especially from generations born after year 2000.

Keywords: Duroc; Growth; Heritability; Landrace; Swine; Ultrasound; Yorkshire

References

1. Genet Sel Evol. 2004 May-Jun;36(3):363-9 - PubMed
2. J Anim Sci. 2005 Mar;83(3):499-506 - PubMed
3. J Anim Sci. 2002 Oct;80(10):2540-7 - PubMed
4. J Anim Sci. 2002 Aug;80(8):2062-70 - PubMed
5. J Anim Sci. 2006 Aug;84(8):2026-34 - PubMed
6. J Anim Sci. 2002 Oct;80(10):2566-73 - PubMed
7. J Anim Sci. 1994 Jun;72(6):1450-4 - PubMed
8. J Anim Sci. 2004 Jul;82(7):1895-902 - PubMed

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