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Genetic Analyses of Carcass Characteristics in Crossbred Pigs: Cross between Landrace Sows and Korean Wild Boars

Choy, Y.H.;Jeon, G.J.;Kim, T.H.;Choi, B.H.;Cheong, I.C.;Lee, H.K.;Seo, K.S.;Kim, S.D.;Park, Y.I.;Chung, H.W.

  • Received : 2001.10.25
  • Accepted : 2002.03.25
  • Published : 2002.08.01

Abstract

Carcass characteristics of 241 crossbred pigs (Korean wild boars ${\times}$ Landrace sows) were analyzed to examine variations in fasted body weight (FASTWT), carcass weight (CARCWT), dressing percentage (DP), back fat thickness (BFT) and longissimus muscle weight (LMW), and to estimate genetic and phenotypic parameters using three different slaughter-end points. Covariates in the least squares full sib model were slaughter age, fasted body weight and back fat thickness of the carcass. Coefficient of variation was highest for BFT followed by LMW, CARCWT, FASTWT and DP in magnitude. Regressions of three covariates on traits were all linear. However, slaughter age was not significant as a linear covariate for five traits while FASTWT was significant for CARCWT and LMW and BFT was significant for all remaining traits. Genetic and phenotypic variation was considerably reduced by regressing FASTWT or BFT in the model. Heritability estimates of FASTWT, CARCWT, DP and BFT were 0.68, 0.61, 0.11 and 0.49, respectively, using slaughter age as covariate (model 1). Those of CARCWT, DP, BFT and LMW were 0.15, 0.15, 0.30 and 0.11, respectively, using FASTWT as covariate (model 2). Heritability estimates of the traits using LMW as covariate (model 3) were similar to the estimates from Model 1 except that the estimate of CARCWT was reduced to 0.39. Genetic or phenotypic correlations among FASTWT, CARCWT and BFT were all positive and moderate to high. Those between BFT and LMW were also positive and low to moderate. However, genetic and phenotypic correlations between DP and CARCWT were positive while those between DP and FASTWT were negative. It was suggested from this study that differences in carcass yield traits be determined using slaughter age or back fat thickness as slaughter-end point and carcass quality traits using fasted body weight as slaughter-end point.

Keywords

Carcass Weight;Longissimus Muscle;Back Fat Thickness;Crossbred;Genetic Correlation

References

  1. Becker, W. A. 1984. Manual of Quantitative Genetics. Academic Enterprises, Pullman, WA.
  2. Robison, O. W., L. L. Christian, R. Goodwin, R. K. Johnson, J. W. Mabry, R. K. Miller and M. D. Tokach. 1999. Effects of genetic type and protein levels on growth of swine. Proc. Amer. Soc. Anim. Sci. E34.
  3. SAS Institute. 1990. SAS/STAT User's Guide. Ver. 6, 4th Ed. Cary, NC, USA.
  4. Rothschild, M. F. and G. S. Plastow. 1999. Advances in pig genomics and industry applications. AgBiotechNet. 1(Feb.), ABN 007:1-7.
  5. Clutter, A. C. and E. W. Brascamp. 1998. Genetics of performance traits. In: The Genetics of the Pig. (Ed. M. F. Rothschild and A. Ruvinsky). CAB International, Wallingford, OX, UK. pp. 427-462.
  6. Henderson, C. R. 1953. Estimation of variance and covariance components. Biometrics 9:226-252. https://doi.org/10.2307/3001853
  7. Cundiff, L. V., K. E. Gregory, R. M. Koh and G. E. Dickerson. 1969. Genetic variation in total and differential growth of carcass components in beef cattle. J. Anim. Sci. 29:233-244. https://doi.org/10.2527/jas1969.292233x
  8. Shanks, B. C., M. W. Tess, D. D. Kress and B. E. Cunningham. 2001. Genetic evaluation of carcass traits in Simmental-sired cattle at different slaughter end points. J. Anim. Sci. 79:595-604. https://doi.org/10.2527/2001.793595x
  9. Stewart, T. S. and A. P. Schinckel. 1989. Genetic parameters for swine growth and carcass traits. In: Genetics of Swine. (Ed. L. D. Young). USDA-ARS, Clay Center, NB, USA. pp. 77-79.
  10. Ducos, A., J. P. Bidanel, V. Ducrocq, D. Boichard and E. Groeneveld. 1993. Multivariate restricted maximum likelihood estimation of genetic parameters for growth, carcass and meat quality traits in French Large White and French Landrace pigs. Genetics, Selection, Evolution 25:475-493. https://doi.org/10.1186/1297-9686-25-5-475

Cited by

  1. Analyses of porcine public SNPs in coding-gene regions by re-sequencing and phenotypic association studies vol.38, pp.6, 2011, https://doi.org/10.1007/s11033-010-0496-1
  2. Single nucleotide polymorphism association study for backfat and intramuscular fat content in the region between SW2098 and SW1881 on pig chromosome 61 vol.90, pp.4, 2012, https://doi.org/10.2527/jas.2011-4228

Acknowledgement

Grant : Porcine genome mapping for economic trait loci (ETI)

Supported by : Ministry of Agriculture and Forestry and Agricultural R&D Promotion Center