Browse > Article

Estimation of Farm-Scale and Environmental Effects for On-Farm Test Records  

Jo, Hwan (Dept.. of Animal Science(Insti. of Agric. & Life Sci.), Gyeongsang National Univ.)
Kim, Byeong-Woo (Dept.. of Animal Science(Insti. of Agric. & Life Sci.), Gyeongsang National Univ.)
Sun, Du-Won (Dept.. of Animal Science(Insti. of Agric. & Life Sci.), Gyeongsang National Univ.)
Kim, Hyo-Sun (National Institute of Animal Science, RDA)
Park, Jae-Chan (Dept.. of Animal Science(Insti. of Agric. & Life Sci.), Gyeongsang National Univ.)
Kim, Jae-Hoon (Dept.. of Animal Science(Insti. of Agric. & Life Sci.), Gyeongsang National Univ.)
Park, Jong-Won (Dept.. of Animal Science(Insti. of Agric. & Life Sci.), Gyeongsang National Univ.)
Lee, Jung-Gyu (Dept.. of Animal Science(Insti. of Agric. & Life Sci.), Gyeongsang National Univ.)
Publication Information
Journal of agriculture & life science / v.44, no.1, 2010 , pp. 33-42 More about this Journal
Abstract
This study was conducted to estimate the effects of breed, sex, Farm-Scale and environment on average daily gain, age at 90kg, backfat thickness, eye muscle area and lean percent of pig. The total number of pig used in this study was 30,525 head consisted of 5,902 Landrace, 18,022 Yorkshire, and 6,601 Duroc on 2004 to 2008. The covariance used in the model to adjust age at the final test. The average daily gain, age at 90kg, and lean percent were significantly superior in medium Farm-Scale. However Backfat thickness and Eye muscle Area were significantly superior in small Farm-Scale. In conclusion this study suggest that breed, sex, test year, test season, Farm-Scale and environment may affect to average daily gain, age at 90kg, backfat thickness, eye muscle area and lean percent. The study about the Farm-Scale has to do continually more than now, and this study will be contributed to development of the pig industry.
Keywords
On-farm test; Selection Index; Correlation coefficients; Test method; Average Daily Gain;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Choi, C. S. 2001. Investigation of breed, sex and environmental factors of swine economic traits from on-farm test records. J. Anim. Sci. Kor. 43: 431-444.
2 Choi, I. S. 2006. Study on appropriate age at end of on-farm test in Swine. Master's. Thesis, GyeongSang National University, Korea.
3 Drewry, K. J. 1980. Growth, feed consumption and efficiency of tested boars. J. Anim. Sci. 50: 411-417.   DOI
4 Harvey, W. R. 1979. Least squares analysis of data with unequal subclass numbers. USDA. ARS. 20 : 8.
5 Han, K. J. and Y. I. Park. 1985. Factors affecting the sale price of the boars performance tested in Korea. J. Anim. Sci. Kor. 27: 342-345.
6 Jung, Y. C., H. Y. Park, C. J. Kim, S. W. Lee, S. L. Kim, and E. S. Lee. 1999. Comparisons of ultrasound machines to predict lean percentage through measuring backfat thickness and loin muscle area from live pigs. J. Anim. Sci. Kor. 41: 497-506.
7 Kuhlers, D. L. and S. B. Jungst. 1991. Mass selection for increased 200days weight in a closed line of Landrace pigs. J. Anim. Sci. 69: 977-984.   DOI
8 Martel, J., F. Minvielle and L. M. Poste. 1988. Effects of crossbreeding and sex on carcass composition cooking properties and sensory characteristics of pork. J. Anim. Sci. 66: 41-46.   DOI
9 National Hog Farmer. 2000. National genetic evaluation program.
10 Ryu, S. H. 2009. Estimation of breed and environmental effects on test traits of pig. Master's. Thesis, GyeongSang National University, Korea.
11 Swiger, L. A., G. A. Isler, and W. A. Harvey. 1979. Postweaning genetic parameters and indexes for swine. J. Anim. Sci. 48: 1096-1100.   DOI
12 Van Alst, G. and O. W. Robison. 1992. Prediction of performance of progeny from test station boars. J. Anim. Sci. 70: 2078-2085.   DOI
13 Van Diepen, T. A. and B. W. Kennedy. 1989. Genetic correlations between test station and on-farm performance for growth rate and backfat in pigs. J. Anim. Sci. 67: 1425-1431.   DOI
14 Bereskin, B. and L. T. Frobish. 1982. Carcass and related traits in Duroc and Yorkshire pigs selected for sow productivity and pig performance. J. Anim. Sci. 55: 554-564.   DOI
15 Bullock, K. D., D. L. Kuhlers, and S. B. Jungst. 1991. Effects of mass selection for increased weight at two ages on growth rate and carcass composition of Duroc - Landrace pigs. J. Anim. Sci. 69: 1409-1419.   DOI