홀스타인 선형심사형질에 대한 유전모수 추정
Genetic Parameters for Eighteen Linear Type Traits in Holstein Cattle
2
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
The objective of this study was to estimate genetic parameters for 18 linear conformation traits and overall conformation score in Holstein cattle. A total of 376,606 records for type traits were collected from 2001 to 2011 from Korea Animal Improvement Association. The model of estimation of variance components and correlations among lactations using VCE included both fixed effects (herd-year-season and stage of lactation parity-wise) and random effect (animal additive genetic). The estimated heritabilities (h2) for capacity class, such as stature, chest width, body depth, angularity, and body condition score were 0.32, 0.16, 0.27, 0.12, and 0.19, respectively. Rump angle and width from rump class also showed h2 of 0.31 and 0.17, respectively. The heritabilities in udder class were mostly low to medium; in which traits were fore udder attachment (0.13), rear udder height (0.17), udder support (0.11), udder depth (0.33), front teat placement (0.17), front teat length (0.21), and rear teat placement (0.21). For feet and legs composite class, the estimated heritabilities for rear leg set, foot angle, rear leg rear view, and locomotion were 0.12, 0.07, 0.08, and 0.03, respectively. The h2 estimated for overall conformation score was 0.16 in the study. The genetic and environmental variance components estimated from this study would be helpful to change from single lactation animal models to multiple lactation animal models in the national genetic evaluation system for the improvement of linear type traits. Moreover, The breeding values obtained using these variance components would be able to be used in the calculation of Korean type production index (KTPI), udder composite (UDC) and, feet and legs composite (FLC).
Abstract
The objective of this study was to estimate genetic parameters for 18 linear conformation traits and overall conformation score in Holstein cattle. A total of 376,606 records for type traits were collected from 2001 to 2011 from Korea Animal Improvement Association. The model of estimation of variance components and correlations among lactations using VCE included both fixed effects (herd-year-season and stage of lactation parity-wise) and random effect (animal additive genetic). The estimated heritabilities (h2) for capacity class, such as stature, chest width, body depth, angularity, and body condition score were 0.32, 0.16, 0.27, 0.12, and 0.19, respectively. Rump angle and width from rump class also showed h2 of 0.31 and 0.17, respectively. The heritabilities in udder class were mostly low to medium; in which traits were fore udder attachment (0.13), rear udder height (0.17), udder support (0.11), udder depth (0.33), front teat placement (0.17), front teat length (0.21), and rear teat placement (0.21). For feet and legs composite class, the estimated heritabilities for rear leg set, foot angle, rear leg rear view, and locomotion were 0.12, 0.07, 0.08, and 0.03, respectively. The h2 estimated for overall conformation score was 0.16 in the study. The genetic and environmental variance components estimated from this study would be helpful to change from single lactation animal models to multiple lactation animal models in the national genetic evaluation system for the improvement of linear type traits. Moreover, The breeding values obtained using these variance components would be able to be used in the calculation of Korean type production index (KTPI), udder composite (UDC) and, feet and legs composite (FLC).
참고문헌 (20)
- Burke, B. P., "Relationship of linear type traits and herd life under different management systems", J. Dairy Sci, 76, pp.2773~2778 (1993)
- Campos, R. V., "Genetic parameters for type traits in Holstein cows in Brazil", R. Bras. Zootec, 41, pp.2150~2161 (2012)
- 조광현, "홀스타인의 국제유전평가를 위한 모형개발에 관한 연구", 한국동물자원과학회지, 55(1), pp.1~6 (2013), 한국동물자원과학회
- DeGroot, B. J., "Genetic parameters and responses of linear type, yield traits, and somatic cell scores to divergent selection for predicted transmitting ability for type in Holsteins", J. Dairy Sci, 85, pp.1578~1585 (2002)
- Dematawewa, C. M. B., "Genetic and phenotypic parameters for 305-day yield, fertility, and survival in Holstein", J. Dairy Sci, 81, pp.2700~2709 (1998)
- 도창희, "국내 Holstein종 젖소의 생산수준이 젖소의 수익형질에 미치는 효과", 한국동물자원과학회지, 55(5), pp.343~349 (2013), 한국동물자원과학회
- Duru, S., "Estimation of variance components and genetic paramters for type traits and milk yield in Holstein cattle", Turk. J. Vet. Anim. Sci, 36(6), pp.585~591 (2012)
- "Description of national genetic evaluation systems for dairy cattle traits as practised in different interbull member countries" (2014)[URL]
- 2013 Business report for animal improvement, "Korea animal improvement association (KAIA)", KAIA, 91~230 (2013)
- Kovacs, M. A., "VCE-5User’s Guide and Reference Manual, Version 5.1", Institute of Animal Husbandry and Animal Behaviour, Federal Research Center of Agriculture, ~ (2003)
- Larroque, H., "Phenotypic relationship between type and longevity in the Holstein breed", Proc. International Workshop on EU concerted action Genetic Improvement of Functional Traits in cattle; Longevity. Jouy-en-Josas, France, 21, pp.96~103 (1999)
- 이기환, "Holstein종 젖소의 선형심사형질에 대한 유전모수추정", 한국동물자원과학회지, 51(5), pp.345~352 (2009), 한국동물자원과학회
- Lee, K. J., "Estimation on genetic parameters for both type and production traits in Holstein cattle", J. Anim. Sci. & Technol, 38(5), pp.455~462 (1996)
- Misztal, I., "Multiple-trait estimation of variance components of yield and type traits using an animal model", J. Dairy Sci, 75(2), pp.544~551 (1992)
- NIAS (National Institute of Animal Science), "2012 Animal Improvement Facts and Figures", NIAS, 67~75 (2013)
- Rogers, G. W., "Relationships among survival and linear type traits in Jerseys", J. Dairy Sci, 74, pp.286~291 (1991)
- SAS Inst., Inc., "SAS User's Guide : Statistics, Ver 9.1 Edition", SAS Inst., Inc., ~ (1999)
- Short, T. H., "Genetic parameters of conformation traits, milk yield, and herd life in Holsteins", J. Dairy Sci, 75(7), pp.1987~1998 (1992)
- Visscher, P. M., "Genetic parameters for milk yield, survival, workability, and type traits for Australian dairy cattle", J. Dairy Sci, 78, pp.205~220 (1995)
- Vukasinovic, N., "Genetic relationships among longevity, milk production, and type traits in Swiss Brown Cattle", Livest. Prod. Sci, 41, pp.11~18 (1995)