농장검정돈의 번식형질에 미치는 환경효과 및 유전모수의 추정
Estimation of Environmental Effect and Genetic Parameter on Reproduction Traits for On-farm Test Records
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The purpose of this study was to estimate the genetic parameters and trend of Landrace and Yorkshire pigs, which were raised on private farms from 1999 to 2005 and tested for their reproductive performance by the Korea Animal Improvement Association. Prior to analysis, records without pedigree or having value with larger than±3×standard deviation for the Total number of born were excluded. The effects of breed and environmental factors were estimated with least square method(Harvey, 1979), and estimation of breeding values and genetic parameters were performed on the data of 1’st litter only with GIBBSF90(Misztal, 2001) which was programmed according to Gibbs Sampling method based on Bayesian Inference by Gianola and Fernando(1986), Jensen(1994) and others. Gibbs sampling was performed 50,000 times for each parameter, and the first 5000 samples were regarded as those in burn-in period and thus, excluded for post hoc analysis. Total number of born and total number of accident were statistically significant(p<0.01) for the breed, farrowing year, farrowing season and parity effects, and the number born alive at birth was statistically significantp<(0.01) for the breed, farrowing year, farrowing season and parity effects. No particular trend was observed in the genetic and phenotypic improvement of the total number of born and number born alive at birth before 2001, when the piglet registration system started, but the tendencies of increasing for the total number of born and number born alive and decreasing for the total number of accident were observed since 2001. Somewhat higher heritability estimates of our study seems to be attributed to the situations that first parity records with poor farrowing performances were used in the analyses and it was impossible to obtain accurate reproductive performance due to the absence of criteria for record keeping at the level of individual farms.
Abstract
The purpose of this study was to estimate the genetic parameters and trend of Landrace and Yorkshire pigs, which were raised on private farms from 1999 to 2005 and tested for their reproductive performance by the Korea Animal Improvement Association. Prior to analysis, records without pedigree or having value with larger than±3×standard deviation for the Total number of born were excluded. The effects of breed and environmental factors were estimated with least square method(Harvey, 1979), and estimation of breeding values and genetic parameters were performed on the data of 1’st litter only with GIBBSF90(Misztal, 2001) which was programmed according to Gibbs Sampling method based on Bayesian Inference by Gianola and Fernando(1986), Jensen(1994) and others. Gibbs sampling was performed 50,000 times for each parameter, and the first 5000 samples were regarded as those in burn-in period and thus, excluded for post hoc analysis. Total number of born and total number of accident were statistically significant(p<0.01) for the breed, farrowing year, farrowing season and parity effects, and the number born alive at birth was statistically significantp<(0.01) for the breed, farrowing year, farrowing season and parity effects. No particular trend was observed in the genetic and phenotypic improvement of the total number of born and number born alive at birth before 2001, when the piglet registration system started, but the tendencies of increasing for the total number of born and number born alive and decreasing for the total number of accident were observed since 2001. Somewhat higher heritability estimates of our study seems to be attributed to the situations that first parity records with poor farrowing performances were used in the analyses and it was impossible to obtain accurate reproductive performance due to the absence of criteria for record keeping at the level of individual farms.
참고문헌 (28)
- Baas, T. J., "Heterosis and recombination effects in Hampshire and Landrace swine: Ⅰ. Maternal traits", J. Anim. Sci, 70, pp.89~ (1992)
- Chen, P., "Genetic correlations between lean growth and litter traits in U.S. Yorkshire, Duroc, Hampshire, and Landrace pigs", J. Anim. Sci, 81, pp.1700~1705 (2003)
- Christians, C. J, "Crossbreeding programs for commercial pork production. PIH-39" (1987), Purde University
- Ferraz, J. B. S, "Animal model estimation of genetic parameters and response to selection for litter size and weight, growth, and backfat in closed seedstock populations of Large White and Landrace swine", J. Anim. Sci, 71, pp.850~ (1993)
- Gianola, D, "Bayesian methods in animal breeding theory", J. Anim. Sci, 63, pp.217~244 (1986)
- Gu, Y., "Estimates of genetic and phenotypic parameters of growth and carcass traits from closed lines of pigs on restricted feeding", Anim. Prod, 49, pp.467~ (1989)
- Harvey, W. R., "Least squares analysis of data with unequal subclass numbers", USDA. ARS, 20, pp.8~ (1979)
- Holm, B., "Genetic correlations between reproduction and production traits in swine", J. Anim. Sci, 82, pp.3458~3464 (2004)
- Irgang, R., "Genetic parameters for litter size of different parities in Duroc, Landrace and Large White Sows", J. Anim. Sci, 72, pp.2237~ (1994)
- Jensen, J, "DMU: A package for the analysis of multivariate mixed models", Proc. 5th World Congr. Genet. Appl. Livest. Prod., 통권 : 22, pp.45~46 (1994)
- Keele, J. W., "Comparison of methods of estimating variance components in pigs", J. Anim. Sci, 69, pp.1428~ (1991)
- Kerr, J. C, "Reproductive performance of pigs selected for components of efficient lean growth", J. Anim. Sci, 60, pp.281~ (1995)
- Long, T. E., "Effects of selection of data on estimates of breeding values by three methods for litter size, backfat, and average daily gain in swine", J. Anim. Sci, 69, pp.2787~ (1991)
- Mercer, J. T, "Genetic parameter estimates for reproductive traits in purebred Landrace pig", Proceeding of 4th World Congress Genetics Applied Livestock Production., 통권 : XV, pp.489~ (1990), Edinburgh
- "BLUPF90 family package//Misztal, I/2001"[URL]
- Park, Y. I., "Comparison of 2-breed crosses. 3-breed crosses and other multiple crosses for certain reproductive traits in swine", Proc. 7th World conf. Anim. Prod., 통권 : 2, pp.56~57 (1993)
- STAT guide for personal computers@8.2, "SAS", pp.2003, SAS
- See, M. T., "Restricted maximum likdlihood estimation of variance components from field data for number of pigs born alive", J. Anim. Sci, 71, pp.2905~ (1993)
- Serenius, T., "Genetic associations of prolificacy with perfor- mance, carcass, meat quality, and leg confor- mation traits in the Finnish Landrace and Large White pig populations", J. Anim. Sci, 82, pp.2301~2306 (2004)
- Southwood, O. I, "Estimation of direct and maternal genetic variance for litter size in Canadian Yorkshire and Landrace swine using an animal model", J. Anim. Sci, 68, pp.1841~ (1990)
- Woodward, B. W., "Development of an animal model for across-herd genetic evaluation of number born alive in swine", J. Anim. Sci, 71, pp.2040~ (1993)
- 김병우, "교배웅돈 효과를 포함한 요크셔종 번식형질의 유전모수 추정에 관한 연구", 석사, pp.2001
- 김성훈, "돼지의 복당산자수와 생시복당 체중에 대한 유전모수의 추정", 한축지, 33, pp.536~ (1991)
- 배규한, "순종과 교잡종 능력에 근거한 종모돈 평가에 관한 연구", 박사, pp.1993
- 오하식, "경상남도 가야 GGP 계열화 돈군의 경제형질에 대한 유전적 변화 추세 추정", 박사, pp.2005
- 윤호백, "돼지의 발정재귀일수, 복당산자수 및 복당체중에 대한 유전모수 추정에 관한 연구", 석사, pp.1996
- 이동호, "종빈돈의 분만성적에 미치는 품종 및 교배조합 효과 추정", 석사, pp.2002
- 조용민, "다형질 애니멀 모델에 의한 돼지의 복당산자수 및 복당체중에 대한 유전모수 추정에 관한 연구", 석사, pp.1996