Broiler의 體重에 對한 相加的 및 非相加的 遺傳分散成分의 推定

M.Y. LEE(李文演),B.K. OHH(吳鳳國) 한국육종학회 1983 한국육종학회지 Vol.15 No.1

This study was conducted to investigate the combining abilities and nonadditive genotype-environmental interaction for broiler body weight at 2, 4, 6 and 8 weeks of age. A total of 1181 progenies were obtained from a full diallel cross of three broiler strains. The estimated heterosis at 2, 4, 6, and 8 weeks of age were 0.43%, 0.79%, 0.99%, and 0. 30% respectively. Heterosis difference by weeks suggested that difference of growth rate between strains and crossbreds. At: all ages of mesurements in both male and female for body weights, averaging additive genetic variance due to sire variance was 11.46%, 17.48%, and averaging maternal effect was 51.69%, 32.38%, respectively. The environmental variance components due to tier effect were decreased in according with increasing of weeks of age. The male progeny was more influenced than female progeny by environmental effect. Nonadditive genetic variance due to genotype interaction in male and female were averaging 3.68%, 4.14%, respectively. Nonadditive genotype-environmental interaction components, Sire × Tier, Dam × Tier, Sire × Dum × Tier, were averaging 1.85%, 9.53%, 28.17% for body weight, respectively. Generally, the ratios of this variance component were decreased in according with increasing of weeks of age.

한우의 체중과 주요체형측정치에 대한 모우의 산차 및 세대효과

이문연,오봉국,송찬원,이기복 ( M . Y . Lee,B . K . Ohh,C . W . Song,K . B . Lee ) 한국축산학회 1985 한국축산학회지 Vol.27 No.11

This study was carried out to investigate the effects of the parity of dam and generation on body weights and body measurements such as chest girth, rump width, rump height, thuds width, withers height and body length of Korean Native Beef Cattle(HANWOO) at birth, 3, 6, 12, 18, 24 and 32 months of age. The data used for this study consisted of 2145 heads of registered female HANWOO which were collected in the 8 provinces from 1979 through 1985 by KAIA and NLCF. In general, the parity effects of dam were the important for the sire evaluation on the body weight; and body measurements. These effects were high at the 3-6th parity and were decreased after the 6th parity. However, the parity effects of dam on body weight in 32 months slightly increased by increasing of parity. This was considered due to some selection effects. The effects of the generation including the environmental and genetic factors were slightly high in generations advanced. This was considered as the important indicators of the improvement in feeding management and the changes of the genetic specification in the population evaluated compared with the base population.

한우의 체중과 체형체측치간의 상관관계 및 유전력추정

이문연,오봉국 ( M . Y . Lee,B . K . Ohh ) 한국축산학회 1985 한국축산학회지 Vol.27 No.11

This study was carried out to estimate the heritabilities for body weights and body measurements and to analysis the relation among body weight and body measurements of female Korea Native Beef Cattle(HANWOO) at birth, 3, 6, 12, 18, 24 and 32 months of age. The data used for this study consisted of 3051 heads of registered female cattle(HANWOO) which were collected in the 8 provinces from 1979 through 1985 by the KAIAand NLCF. When the cost and labor in the measurement of the body were considered, the effective stepwise regression model of the body measurements on the body weight by the maximum R² improvement was the Model 6 including chest girth, rump width, rump height, thuds width, withers height and body length. The determinent coefficient(R²) of the Model 6 was 0.91. The heritabilities of the body weights at birth, 3, 6, 12, 18, 24 and 32 months of age were 0.20, 0.50, 0.48, 0.47, 0.22, 0.89 and 0.77, respectively. The ranges of the heritabilities on body measurements of withers height, rump height, body length, chest depth, chest width, rump length, rump width, thuds width, chest girth, and shank circumference at birth through 32 months of age were 0.05-0.86, 0.41-1.32, 0.20-1.05, 0.28-0.84, 0.10-0.90, 0.18-0.92, 0.20-0.63, 0.12-0.85, 0.22-0.92 and 0.09-0.91, respectively.

개체모형을 위한 유전적 모수 추정에 관한 연구

최윤석(Y . S . Choi),이광전(K . J . Lee),이문연(M . Y . Lee),박경도(K . D . Park) 한국축산학회 1992 한국축산학회지 Vol.34 No.5

Data of 1810 milk and fat records of 109 sires and their pedigree in 48 herds calving from 1985 to 1991 were used to estimate genetic parameters for the animal model. The estimates of the heritabilities for milk and fat yields by multivariate REML procedure were 0.32(0.10) and 0.29(0.10), respectively. Estimated genetic and phenotypic correlations were 0.70(0.13) and 0.72(0.01). respectively. The additive genetic relationship between milk yield and fat yield appeared to be quadratic rather than the linear based on the PTA from the animal model. Relative magnitudes of variance components for error. permanent environment, and herd-sire interaction did not have significant effects on the PTA and their ranks, iteration time, and iteration number to meet convergence in the animal model. But there were considerable differences(420) in the number of iteration to meet convergence when some different variance component ratios of error to additive genetic effect(1 to 5) were used in the animal model.

한우의 체중과 체척치에 대한 일반능력

양영훈,오봉국,이문연,이득환 ( Y . H . Yang,B . K . Ohh,M . Y . Lee,D . H . Lee ) 한국축산학회 1990 한국축산학회지 Vol.32 No.11

The purpose of this paper is to investigate the performances of the body weights and the 11 body measurements of Hanwoo raised between 1987 and 1989 in farms and Hanwoo progeny test center. The body weights at birth, 6, 12, 18 and 24 months of age were 22.49kg, 148.18kg, 223.48kg, 267.76kg, and 291.77kg respectively. The body measurements were increased rapidly up to about 6 months of along with the body weight. Feeding managements and the nursing capacity of dam were considered important. factors to develop the body size of a calf early growing stage. As compared with the previous reports, for the body weights at 6 and 12 months of age and the measurements for body length, chest girth, and shank circumference at 6, 12 and 18 months of age were somewhat increased. This might be come from the improved feeding managements and the change of growth type by selection. The hipbones width(pinbones width), which had not been reported, at birth, 6, 12, 18 and 24 months of age were 8.96cm, 19.09cm, 19.26cm, 21.04cm, and 22.19cm respectively. The body measurements of 11 traits of male calves at 7 months of age shown to be similar to those of female calves at 12 months of age.

유우의 부분기록에 대한 이용효율을 높이기 위한 회귀계수 추정

도창희,오봉국,이정구,이문연 ( C . H . Do,B . K . Ohh,J . K . Lee,M . Y . Lee ) 한국축산학회 1986 한국축산학회지 Vol.28 No.3

This study was carried out to estimate regression factors for extending partial records to 305-day records from data which were collected from 6 Holstein herds from 1969 through 1984. The records were pre-adjusted for the effect of herd, year, month of calving, and parity. The results obtained are as follows: 1. The best single month for estimating a complete lactation was the 5th or 6th months (R=0.87), while regression factors developed from sequential monthly records for extension were available over the first 5 monthly records (R=0.92-0.99). 2. Multiple regression factors by the use of each monthly record were more available over the fast 4 monthly records (R=0.91-1.00) and appeared to be substantially more precise than single monthly regression factors and cumulative monthly regression factors. 3. Regression equations including the last monthly record to estimate the remaining part were more available when the unknown part period was short.

국내 홀스타인종 유우의 부분산유기록을 확장하기 위한 비율계수 추정에 관한 연구

도창희,오봉국,이정구,이문연 ( C . H . Do,B . K . Ohh,J . K . Lee,M . Y . Lee ) 한국축산학회 1986 한국축산학회지 Vol.28 No.3

Ratio factors for extending partial records to 305day were estimated on 3,740 complete lactation rewrds collected from 6 Holstein herds from 1969 through 1984. The results obtained are as follows: 1. The single monthly ratio factors were higher in the late stage than in the early stage, and higher for the 1st parity than the 2nd, 3rd and later partities. The value of R² of the factors was relatively high in the middle stage (4th-7th month). 2. The cumulative monthly ratio factors were also higher for the 1st parity than the other parities, and lower in July through October than in the other months. The value of R2 of the factors increased as monthly tests continued; and over 0.80 if the number of monthly test record included more than 5. 3. The ratio factors for the period of unknown part on the last monthly yield decreased while the value of R² of the factors increased as the period of unknown part became short.

돼지의 繁殖能力에 对한 結合能力, 母體效果 및 相反交雜効果 推定에 關한 硏究

S. B. Chung(鄭船富),I. C. Cheong(鄭鎰鉦),M. Y. Lee(李文演),K. Y. Lee(李根常) 한국육종학회 1983 한국육종학회지 Vol.15 No.3

This study was conducted to estimate combining abilities, maternal and reciprocal effects for reproductive traits in swine. Data obtained from the litters of Duroc, Landrace, Yorkshire and Hampshire breeds were analysed. The least-square means and standard errors for pig weight at birth and 21 days of age, litter sizes at birth and 21 days of age, and liveability were 1.25±0.013㎏, 4.92± 0.027㎏, 10.29±0.074 heads, 8.55±0.089 heads and 84.48±1.028%, respectively. The variance components for pig weight at birth and 21 days of age were largely due to breed difference, reciprocal effect and general combining ability. The variance components for litter size at birth and 21 days of age were resulted from nonadditive genetic variance (specific combining ability and heterosis) and reciprocal effect. Particulary specific combining ability was most important factor for litter size at birth and maternal effect was most important in percentage survival. In addition to this, specific combining ability and reciprocal effect were also important for this trait.

産卵鷄種의 主要經濟形質에 대한 結合能力 推定에 관한 硏究

OHH B.K(吳鳳國),J.S. YEO(呂政秀),J.K. LEE(李正九),M.Y. LEE(李文演) 한국육종학회 1980 한국육종학회지 Vol.12 No.3

This study was carried out to estimate combining abilities for economic traits in layer chickens. The data used in this study were the record of 10 single crosses produced by half diallel cross of 5 lines of Single Comb White Leghorns, such as A, B, C, K and S lines. Total 720 progenies of the crosses were reared at the Poultry Breeding Farm, College of Agriculture, Seoul National University from Feb. 1979 to August, 1980. Combining abilities were estimated by Griffing’s mathematical model for the traits; age at the first egg, total egg number, egg weight and body weight. The results abtained from the studies were summarized as follows; in estimate of combining ability, an age at first egg of BS cross was largely due to significiantly higher general combining ability (G.C.A) effect of B and S strains than C and K strains in G.C.A. effect, and to specific combining ability (S.C.A) effect of B and S strains. AB and BS crosses showed the highest egg production. AB cross performance was result from high G.C.A. effect of A and B strains.BS cross performance was result from high G.C.A. effect of B and high S.C.A. effect of BS cross. Specific combining ability effect in egg weight was not statiscally significant, but S strain showed high G.C.A. effect. A and B strains in body weight showed significantly low G.C.A. effect. From the above results, BS cross in an age at first egg, AB and BS crosses in egg production, S strain in egg weight and AB cross in body weight were superior to other strains or crosses.

肉鷄의 生産性向上을 위한 優良交配組合 選拔試驗

S. W. Han(韓成郁),B. K. Ohh(吳鳳國),M. Y. Lee(李文演),Y. H. Choi(李正九崔然皓) 한국육종학회 1981 한국육종학회지 Vol.13 No.3

Three commercial breeders of broiler were crossed in a 3×3 diallel to estimate combining ability and to find superior mating system. Total 1,181 progenies measured for 2, 4, 6, and 8 week body weight. Compared with pure strains, crossbred consistently showed heterosis in fertility, hatchability, early body weight and feed efficiency. General and specific combining ability and reciprocal effect all were highly significant for measures of body weight except at 2 weeks of age, while those was significant for feed efficiency only at 2 weeks of age. Superior mating systems were AB, BA and crosses.