대요크셔종과 랜드레이스종간 상반교잡이 돼지의 복당산자수와 복당체중에 미치는 효과

박영일(Y . I . Park),이수찬(S . C . Lee),김성훈(S . H . Kim) 한국축산학회 1995 한국축산학회지 Vol.37 No.5

The reciprocal crosses between Large Yorkshire and Landrace were compared for the litter size and litter weight on the basis of the data from 4,250 litters of pigs furrowed at the S. Swine Breeding Farm from January, 1986 to June, 1993. The Y×L cross produced by Landrace darns was significantly heavier than the L×Y cross produced by Large Yorkshire dams by 1.61±0.18 ㎏ for the litter weight at birth and by 5.17±0.64 ㎏ for the litter weight at 3 weeks. The Y×L cross had larger litter size at 3 weeks of age by 0.18±0.09 than the L×Y cross, but the difference between the reciprocal cross was statistically insignificant for the litter size at birth. The superiority of Y×L cross over the L×Y cross in the litter weight at birth was significantly reduced in the 9th parity and later as compared to other parities, which reflected the significant interaction between reciprocal crossing arid parity for this trait. The effect to of parity, year of birth and month of birth were also estimated.

돼지의 번식형질에 대한 교배조합의 효과

김낙환(N . H . Kim),김성훈(S . H . Kim),정영철(Y . C . Jung),박영일(Y . I . Park) 한국축산학회 1992 한국축산학회지 Vol.34 No.3

The data from 3,366 litters of pigs farrowed from November. 1988 to April, 1991 at J Swine Breeding Farm in Icheon, Kyunggi Province were statistically analysed by least squares method to compare the reproductive performance of eight different crosses, D × YL, D × LY, D × DYL. D × DLY, Y × DYL., Y × DLY, Y × L and L × Y. The 3-breed crosses, D × YL and D × LY had the best performance in the number born alive per litter and in the number suckled per litter. Y × DLY, D × YL and D × LY had the largest number born per litter. Of the multiple crosses produced by the 3-breed cross females, D × DYL, Y × DLY and Y × DYL had relatively good performance. The number of stilborn pig per litter was largest in Y × DLY.

돼지의 이유시 체중과 이유시 복부체중에 대한 3 품종 교잡종과 퇴교배종의 (退交配種) 비교

박영일,김종복,진석병 ( Y . I . Park,J . B . Kim,S . B . Jin ) 한국축산학회 1984 한국축산학회지 Vol.26 No.1

The body weights of pig and litter at weaning at 30 days of age were compared between three-breed cross and backcross swine by least squares method on the basis of the data from 2,310 litters of three-breed crosses and 227 litters of backcrosses produced from crossbred Yorkshire-Landrace, Duroc-Yorkshire and Duroc-Landrace dams mated to purebred Duroc, Landrace and Yorkshire boars. The results obtained in this study are as follows. 1. The three-breed crosses, D x YL, L x DY and Y x DL tended to have heavier individual pig weight and litter weight at weaning than the backcrosses. The average superiority of the three-breed crosses over the backcrosses expresses as percentage of the backcross mean was 1.8% for the individual pig weight and 3.0% for the litter weight at weaning. 2. None of the contrasts between sire breeds or between crossbred dam groups was statistically significant for the two traits studied. 3. The results obtained in this study indicate that the use of three-breed cross is preferable to the backcross in order to have heavier pigs and litters at weaning.

우량육용계의 선발을 위한 교잡시험

박영일,백동훈 ( Y . I . Park,D . H . Baik ) 한국축산학회 1973 한국축산학회지 Vol.15 No.4

The purpose of this experiment was to compare the performance of the crosses of seven different stocks to Cornish males for broiler production. The seven stocks used as female parents were White Plymouth Rocks, Columbians, Barred Plymouth Rocks, New Hampshires, Stock D, Stock C, and Stock H. The first four stocks, WR, Columbian, BR, and NH were the pure Strains that had been maintained at the College of Agriculture, Seoul National University. The Stock D was the female parent stock of a broiler stock produced by a Korean Poultry Breeding Farm. The stocks C and D were the commercial chicken of two different broiler stocks imported from abroad. The commercial chicks of the imported Hubbard Broilers were used as the control to compare with the seven different crosses mentioned above. The average body weight at 8 weeks of age was 1,596 grams for the Hubbard Broilers, 1,563 grams for the C×Cornish, and 1,544 grams for the H×Cornish, all of which were significantly larger than those of other stocks compared. The income per bird over the cost of feed and day-old chick was largest for the C×Cornish, followed in rank by the H×Cornish, Hubbard Broilers, D×Cornish, Columbian×Cornish, NH×Cornish, BR×Cornish, and WR×Cornish. The superior performance of the C×Cornish and H×Cornish appeared to be due to the effect of the genes transmitted from their dams. The hens of the Stock C had a higher rate of laying, and had a heavier egg weight than those of the Stock H. The age at 50% production was 196 days for the Stock C, 195 days for the Stock H and 179 days for the Stock D. The average body weight of the hens at 30 weeks of age was about 3.2㎏ for both Stocks C and H.

닭의 성장율에 미치는 반성유전효과의 추정

박영일 ( Y I Park ) 한국축산학회 1971 한국축산학회지 Vol.13 No.2

The effect of sex-linked genes on the growth rate of chicken was estimated by subtracting the difference between the New Hampshire(♂)×Rhode Island Red(♀) cross and Rhode Island Red(♂)×New Hampshire(♀) cross in males, the maternal effect and other effects confounded, from the difference between the two crosses in females. This estimate of sex-linked effect is equal to the interaction between sex and mating type, and assumes the absence of the interactions of sex with both maternal and sex-linked effects. The estimate of sex-linked effect, based on the data obtained in this study, was 4.0±3.8 grams for 4 week weight, 6.3±6.1 grams for 6 week weight, and 15.4±11.3 grams for 8 week weight. The effect of sex-linked genes on the traits examined in this study was statistically insignificant, suggesting that the effect of sex chromosome from the New Hampshire is not significantly different from that from the Rhode Island Red.

도서지역한우의 체적측정치비교

박영일 ( Y I Park ) 한국축산학회 1972 한국축산학회지 Vol.14 No.4

The purpose of this study was to compare body measurements of Korean Native Cattle in Wullung, Cheju, and Kanghwa Islands and in the Mainland to determine if there are any valuable cattle that can be used as seed stock for the improvement of Korean Native Cattle. The data used in this study were collected from a total of 365 Korean Native Cattle, 145 in Cheju Island, 93 in Wullung Island, 34 in Kanghwa Island, and 93 in Kyung-buk province of the Mainland. The Korean Native Cattle of Wullung Island were significantly larger than the others in most measurements, and the Cheju Cattle were significantly smaller than the others. The Cattle of Kanghwa Island and of Kyung-buk province were larger than the Cheju Cattle, but were smaller than the Cattle originated from the Wullung Island. The differences between the Kanghwa and Kyung-buk Cattle were small and insignificant for most measurements. The Korean Native Cattle of Wullung Island originated from the Island were distinctly larger in the measurements than the Cattle that were imported from the Mainland as calves and grown in the Island. The differences between the Cattle of Wullung Island and the imported Cattle pooled over the age groups(Wullung minus Mainland) were 12.13±2.19㎝ for chest girth, 3.08±1.19㎝ for withers height, 7.41±1.65㎝ for body length, 4.52±0.89㎝ for chest width, and 4.15±0.80㎝ for hip width. These estimates of the difference were highly significant.

앙고라종 가토의 능력에 미치는 근친교배의 효과에 관한 연구

박영일(Y . I . Park),홍성호(S . H . Hong),김종주(J . J . Kim),김낙환(N . H . Kim) 한국축산학회 1990 한국축산학회지 Vol.32 No.8

This study was conducted to estimate the effect of inbreeding on the performance of Angora rabbit by the comparison of the inbred offspring produced by full-sib mating and non-inbred offspring. Seventy-three litters of Angora rabbit were produced and performance tested. Of these, 34 litters were inbred and 39 litters were non-inbred. The data were statically analyzed by the least squares method. The difference between inbred and non-inbred offspring (non-inbred-inbred) estimated was 20g for 3 week weight, 60g for 2 month weight, 86g for 4 month weight, 48g for 7 month weight, 7g for wool yield to 140 days of age, 0.03 for litter size at birth, 0.05 for litter size at weaning, -0.2 day for gestation length and 3.9% for survival rate to weaning. Although the inbred offspring were inferior to the non-inbred offspring in body weights, wool yield, litter size at birth, litter size at weaning and survival rate to weaning, the differences between inbred and non-inbred offspring were statistically insignificant for all traits studied.

고속스핀들의 돌출량 실험

박영일(Y. I. Park),홍성욱(S. W. Hong),배규현(G. H. Bae) 한국정밀공학회 2014 한국정밀공학회 학술발표대회 논문집 Vol.2014 No.5월

육용계에 있어 계종과 사양수준간의 상호작용에 관한 연구

박영일(Y . I . Park),배규한(G . H . Bae),정흥우(H . W . Chung) 한국축산학회 1987 한국축산학회지 Vol.29 No.6

Five different broiler stocks were compared under two kinds of feeding regimes with different levels of dietary protein and energy to study the interaction between stock and feeding regime. An experimental unit was composed of ten chicks and 6 units were allotted per feeding regime per stock. The traits studied were body weights at 2, 4, 6 and 8 weeks of age, shank length and keel length at 6 and 8 weeks and feed efficiency. viability and income per bird over the cost of day old chick and of feed for the period 0 - 6 weeks and 0 - 8 weeks. The differences among stocks were large and significant for most traits. The differences between the feeding regimes were statistically significant for body weights, keel length and feed efficiency. Males had larger body weights, longer shank and keel, better feed efficiency and higher gross income per bird than females. The interaction between stock and feeding regime was statistically not significant in all traits studied except the feed efficiency for 0-6 weeks and income per bird for 0-8 weeks. The interaction between stock and sex was statistically not significant except the body weights at 6 and 8 seeks. The significant interaction for the body weights appeared to be resulted from a smaller sex difference in certain stock compared with those in other stocks. The interaction between feeding regime and sex was statistically significant for none of the traits studied. The results obtained indicate that the interaction between stock and feeding regime is relatively unimportant for most traits examined in this study.

제주한우에 있어 모색과 체척측정치간의 관계

박영일 ( Y I Park ) 한국축산학회 1972 한국축산학회지 Vol.14 No.2

Certain body measurements of yellowish brown and black cattle were compared to examine if there is any relation between coat color and body measurements in Korean Native Cattle of Cheju Island. The data used were obtained from 145 Cheju Cattle in Cheju Island. The estimates of the difference between yellowish brown and black coat colors (yellowish brown minus black) pooled over the age groups were 1.33±1.23㎝ for chest girth, 0.13±0.88㎝ for withers height, -0.01±0.88㎝ for body length, 0.73±0.66㎝ for chest width, 0.29±0.44㎝ for chest depth, -0.03±0.62㎝ for hip width, and 0.09±0.57㎝ for pin bone width. None of the differences were statistically significant.