Estimation of Genetic Parameters for Linear Classification Traits in Hanwoo cows Using Multiple Trait Animal Model

다국어 초록 (Multilingual Abstract)

This study was conducted to analyzed the statistical model of Hanwoo(Korean native cattle) cows linear classification trait, analyze the structure and environmental effects of linear classification data, and estimate genetic parameters for linear classification data by applying the analyzed environmental effects to use them as basic data for improving the body measurement and appearance of Hanwoo cows animals at the farm level. The data used in this study collected cows linear classification data that participated in the Hanwoo cows linear classification project promoted by the Korea Animal Improvement Association(KAIA) from 2014 to 2019 to quantify the body measurement of cows and use them for livestock improvement, selection, and culling. Among them, the most recent linear classification data was selected as analysis data, the previous data was deleted, outliers in the data were removed, and 369,723 Hanwoo cows suitable for Estimated Breeding Value(EBV) analysis were used. In addition, outliers were removed from the Hanwoo cows linear classification data, and the final score calculated by applying level and grade trait data and four data such as body height, body width, rump length, and pinbone width, which were found to have a high genetic correlation among 19 traits, was used. After removing outliers from the data, the most recent data was selected and used for analysis based on the linear classification month age when the linear classification data was repeatedly recorded for each parity. The least square mean analysis by linear classification trait showed that body height, which is most involved in body measurement and growth, steadily increased up to about 50 months, but there was no change thereafter. It was analyzed that the growth of Hanwoo cows ends on average when they are 50 months old, and the increase in body height slowed after the calf was produced. In the basic statistical analysis of linear classification traits, the average and standard deviation of body height, body width, rump length, pinbone width, and final score were analyzed as 6.22±1.33, 5.83±1.22, 5.88±1.20, 5.63±1.32 and 80.0±1.83. To analyzed the factors of environmental effects, the farm-birth year-birth season was set as one effect HYS(Herd-Year-Season) to establish the BCS(Body Condition Score), the classifier, the linear classification month, and the contemporary group, and a variance analysis was conducted to confirm that there was a high significant difference(p<0.001) with traits in BCS, classifier, linear classification month, and HYS. In the estimation of the genetic parameters of linear classification traits for Hanwoo cows, the heritability of body height, body width, rump length, pinbone width, and final score were estimated to be 0.42, 0.18, 0.34, 0.25 and 0.37, respectively. In the analysis of the genetic correlation coefficient between linear classification traits, body height, body width, rump length, pinbone width, and final score were analyzed as 0.80, 0.96, 0.95 and 0.94, respectively, pinbone width and final score were analyzed as 0.84, 0.84, and 0.89, rump length and pinbone width and final score were 0.94 and 0.92, and pinbone width and final score were analyzed as having a high genetic correlation of 0.97. In the phenotypic correlation coefficient analysis, body height, rump length, pinbone width, and final score were analyzed as 0.39, 0.63, 0.54, and 0.70, respectively, while body width, rump length, pinbone width, and final score were 0.40, 0.48, and 0.65, and rump length, pinbone width, and final score were analyzed as 0.61 and 0.70, and pinbone width and final score were 0.73, showing a high correlation between the traits. In the future, continuous research on linear classification traits should be conducted to find out the ideal body type ability of Hanwoo cows for growth ability and fertility trait, and it is believed that the productivity of Hanwoo should be improved through this.

참고문헌 (Reference)

• 1 李文演, "한우의 체중과 체형에 대한 유전모수 추정과 종모우 평가에 관한 연구" 서울대학교 대학원 1986
• 2 한광진, "한우의 체중과 체척치에 대한 유전모수의 추정" 한국축산학회 44 (44): 201-206, 2002
• 3 최호성, "한우의 체중 및 체위형질에 대한 유전력 및 유전상관의 추정" 38 (38): 463-470, 1996
• 4 이기환 ; 구양모 ; 김정일 ; 송치은 ; 정용호 ; 노재광 ; 하유나 ; 차대협 ; 손지현 ; 박병호 ; 이재구 ; 이정규 ; 이지홍 ; 도창희 ; 최태정, "한우 암소의 선형 및 외모심사형질에 대한 유전모수 추정" 농업생명과학연구원 51 (51): 89-105, 2017
• 5 구양모 ; 김정일 ; 송치은 ; 신재영 ; 이재윤 ; 이종헌 ; 조병대 ; 김병우 ; 이정규, "한우 거세우 도체중 및 체형형질의 유전모수 추정에 관한 연구" 한국축산학회 50 (50): 157-166, 2008
• 6 송치은 ; 상병찬 ; 도창희, "국내 홀스타인젖소의 선형심사에 대한 보정계수 개발" 한국축산학회 44 (44): 3-12, 2002
• 7 손삼규, "개량단지 한우 암소의 경제형질에대한 유전력 추정" 39 (39): 653-660, 1997
• 8 Dadati E, "Relationships between conformation and reproduction in Holstein cows: Type an calving performance" 68 : 2639-2645, 1985
• 9 Weigel DJ, "Prediction of transmitting abilities for productive life and lifetime profitability from-135 -production, somatic cell count, and type traits in milk markets for fluid milk and cheese" 80 : 1398-1405, 1997
• 10 Vanraden PM, "Prediction of transmitting abilities for Holstein type traits" 73 : 191-197, 1990
• 11 Forabosco F, "Phenotypic relationships between longevity, type traits, and production in Chianina beef cattle" 82 : 1572-1580, 2004
• 12 Misztal I, "Multiple-trait estimation of variance components of yield and type traits using an animal model" 75 : 544-551, 1992
• 13 KAIA, "Hanwoo Linear Classification Technical Education Textbook"
• 14 Gutierrez JP, "Genetic relationships between calving date, calving interval, age at first calving and type traits in beef cattle" 78 : 215-222, 2002
• 15 Němcová E, "Genetic parameters for linear type traits in Czech Holstein cattle" 56 (56): 157-162, 2011
• 16 DeGroot BJ, "Genetic parameters and responses of linear type, yield traits, and somatic cell scores to divergent selection for predicted transmitting ability for type in Holsteins" 85 : 1578-1585, 2002
• 17 Cole JB., "Genetic evaluation of lactation persistency for five breeds of dairy cattle" 92 : 2248-2258, 2009
• 18 Napolitano, Catillo, "Evidence for quantitative traits locus for conformation traits on chromosome 19 in beef cattle" 118 : 119-124, 2001
• 19 Thompson FR, "Evaluation of linear type linear program in Holsteins" 34 : 1610-1617, 1981
• 20 Veerkamp RF, "Evaluation of classifiers that score linear type traits and body condition score using common sires" 85 : 976-983, 2002
• 21 Duru S, "Estimation of variance components and genetic parameters for type traits and milk yield in Holstein cattle" 36 (36): 585-591, 2012
• 22 Gutiereez JP, "Estimation of genetic parameters of type traits in Asturiana de los Valles beef cattle breed" 119 : 93-100, 2002
• 23 Lee KH, "Estimation of genetic parameter for linear type and conformation traits in Hanwoo cow" Chungnam National University 2011
• 24 Misztal I, "BLUPF90 family of programs" University of Georgia, Athens
• 25 Vollema AR, "A comparison of breeding value predictors for longevity using a linear model and survival analysis" 81 : 3315-3320, 1998
• 26 Henderson CR., "A Simple Method for Computing the inverse of a numerator relationship matrix used in prediction of breeding values" 32 : 69-83, 1976
• 27 김형철, "30개월령 한우의 체중 및 체형에 대한 유전력 및 유전적 개량추세의 추정" 1 (1): 273-276, 1997