Correlation Analysis of Primal Cuts Weight, Fat Contents, and Auction Prices in LYD Pig Carcasses by VCS2000

Youngho Lim1, Yunhwan Park1, Gwantae Kim1, Jaeyoung Kim1, Jongtae Seo2, Jaesik Lee2, Jungseok Choi1,*
Author Information & Copyright
1Department of Animal Science, Chungbuk National University, Cheongju-si 28644, Korea.
2Bugyeong Pig Farmers cooperative, Gimhae-si 50925, Korea.
*Corresponding Author: Jungseok Choi, Department of Animal Science, Chungbuk National University, Cheongju-si 28644, Korea, Republic of. Phone: +82-43-261-2551. E-mail:

© Copyright 2023 Korean Society of Animal Science and Technology. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


Currently, in pork auctions in Korea, only carcass weight and backfat thickness provide information on meat quantity, while the production volume of primal cuts and fat contents remains largely unknown. This study aims to predict the production of primal cuts in pigs and investigate how these carcass traits affect pricing. Using the VS2000, the production of shoulder blade, loin, belly, shoulder picnic, and ham was measured for gilts (17,257 pigs) and barrows (16,365 pigs) of LYD (Landrace × Yorkshire × Duroc) pigs. Single and multiple regression analysis were conducted to analyze the relationship between the primal cuts and carcass weight. The study also examined the correlation between each primal cut, backfat thickness (1st thoracic vertebra backfat thickness, grading backfat thickness, and Multi-brached muscle middle backfat thickness), pork belly fat percentage, total fat yield, and auction price. A multiple regression analysis was conducted between the carcass traits that showed a high correlation and the auction price. After conducting a single regression analysis on the primal cuts of gilt and barrow, all coefficients of determination (R<sup>2</sup>) were 0.77 or higher. In the multiple regression analysis, the R<sup>2</sup> value was 0.98 or higher. The correlation coefficient between the carcass weights and the auction price exceeded 0.70, while the correlation coefficients between the primal cuts and the auction prices were above 0.65. In terms of fat content, the backfat thickness of gilt exhibited a correlation coefficient of 0.70, and all other items had a correlation coefficient of 0.47 or higher. The correlation coefficients between the Forequarter, Middle, and Hindquarter and the auction price were 0.62 or higher. The R<sup>2</sup> values of the multiple regression analysis between carcass traits and auction price were 0.5 or higher for gilts and 0.4 or higher for barrows. The regression equations between carcass weight and primal cuts derived in this study exhibited high determination coefficients, suggesting that they could serve as reliable means to predict primal cut production from pig carcasses. Elucidating the correlation between primal cuts, fat contents and auction prices can provide economic indicators for pork and assist in guiding the direction of pig farming.

Keywords: LYD pig; Carcass traits; regression analysis; Correlation coefficient; Auction price; VCS2000