Crosses Between Korean Native Cattle and Hereford ; 1 . Comparison of Korean native cattle , Hereford and Korean Hereford crossbred on calf performance to weaning

설동섭 ( D S Sul ),N/A ( B T Ryu ) 한국축산학회 1968 한국축산학회지 Vol.9 No.2

The data consisted of records of 35 straightbred and crossbred matings of Korean and Hereford cattle, collected over a 2-year period, were analyzed by least squares procedures to estimate the amount of heterosis from breed crosses. This procedure adjusted calf measurement data for the environmental effects of year-season of birth, sex and age of dam. The number of cows exposed to mating varied for breeds because the number of Hereford cows was not good enough for planned straightbred mating. The most important finding was about 10% advantage in calves weaned from crossbred matings, indicating heterosis for average daily suckling gain and weaning weight. Birth weights of crossbred calves were 8.4% heavier than those of average straightbred ones, although this difference was not significant.

닭의 경제형질에 대한 유전력 및 유전상관에 관한 연구

정선부,설동섭,탁태구,김상철,이기만 ( S . B . Chung,D . S . Sul,T . Y . Tak,S . C . Kim,K . M . Lee ) 한국축산학회 1973 한국축산학회지 Vol.15 No.3

The purpose of this study was to evaluate the value of initial egg weights as selection criterion of laying hens for improvement of egg production performance. Data here used came from records of 406 white leghorn hen progenies produced by hierachal mating of 44 sires and 201 dams at three different hatching stages, which were maintained at Livestock Experiment Station. The data were analysed by the method of variance component analysis to estimate heritabilities, maternal variance, on 5 economic traits and genetic, phenotypic and environmental correlations among them. The results obtained were as follows: 1. The heritability estimates were 0.549 for body weight at first egg, 0.500 for age at first egg, 0.160 for initial egg weight, 0.398 for matured egg weight and 0.429 for egg number to 500 days. 2. The fraction of the total variance which were due to the maternal effect was 0.175 for body weight at first egg, 0.204 for age at first egg, -0.058 for initial egg weight, 0.140 for matured egg weight and 0.095 for egg number to 500 days. 3. The genetic correlations of body weight at first egg with age at first egg, initial egg weight, matured egg weight and egg number to 500 days were -0.503. 0.300, -0.186 and -0.105, respectively. The genetic correlations of age at first egg with initial egg weight, matured egg weight and egg number to 500 days were 0.501, -0.238 and -1.969. The genetic correlations of initial egg weight with matured egg weight and egg number to 500 days were 0.493 and -0.537. There was 0.068 of genetic correlations between matured egg weight arid egg number to 500 days. On the basis of the results obtained in this study, it is recommented that for the effective improvement of egg weight, selection should be practiced for initial egg weight.

Saanen 과의 누진교잡에 의한 재래산양 개량 시험 제1보 Saanen 과 재래산양의 교잡종에 대한 월령별 체중변화

이길왕,최광수,설동섭,이기만 ( K . W . Lee,K . S . Choi,D . S . Sul,K . M . Lee ) 한국축산학회 1973 한국축산학회지 Vol.15 No.4

The data from 112 purebred and crossbred goats produced by matings of Korean native goats and Saanen, which were investigated at Livestock Experiment Station since 1963, were analysed by least square method to investigate changes of body weights of the native goats by grading up with Saanen. This procedure adjusted the measurement data for environmental effects of year of birth, age of dam and litter size. The results obtained were as follows; 1. The body weight was measured and adjusted at birth, weaning, 12 and 18 months of age as 1.83㎏, 6.99㎏, 14.51㎏ and 18.90㎏ in Korean native goats, 2.98㎏. 12.25㎏, 25.49㎏ and 36.93㎏ in purebred Sannen, 2.69㎏, 11.14㎏, 23.03㎏ and 29.27㎏ in the first filial generation, and 2.78㎏, 11.85㎏, 24.77㎏ and 36.19㎏ in the second graded generation, respectively. 2. The body weights of first filial and second generation were heavier than those of native goats through all months of age. The increment of body weight in the first filial generation to the native goats was 0.86㎏ at birth, 4.15㎏ at weaning, 8.50㎏ at 12 months and 10.37㎏ at 18 months of age. In the second generation the increment of body weight was 0.94㎏, 4.85㎏, 10.26㎏ and 17.29㎏, respectively. 3. The differences of body weight between purebred Saanen and the first generation were 0.28㎏ at birth, 1.11㎏ at weaning 2.4㎏ at 12 months and 7.6㎏ at 18 months of age, but significant difference was found only at 18 months of age (p$lt;0.01). The body weight of the second generation was slightly lighter by 0.20 to 0.75㎏ than that of purebred Saanen through all months of age. 4. The second generation was heavier than the first generation by 0.08㎏ at birth. 0.71㎏ at weaning, 1.73㎏ at 12 months and 6.92㎏ at 18 months of age, but significant difference was found after 18 months of age (p$lt;0.05).

난용도입계의 우량교배조합 선발시험

정선부 ( S B Chung ),설동섭 ( D S Sul ),오봉국 ( B K Ohh ) 한국축산학회 1971 한국축산학회지 Vol.13 No.3

The study was carried out to select the superior laying hens by crossing of 5 white Leghorn strains. The Colonial strain females which were imported from U.S.A. in 1967 were crossed with 4 different inbred strain male of White Leghorn. Body weights at 8 weeks, at first egg, at 300 and at 500 clays were heavier in crossbreds than in imported strain. Age at first egg was similar in crossbred and in imported strain. The egg weight of crossbreds(58.73g) was heavier than mid-parents but lighter than imported strain(60.57g). Crosshred, except for M×C, produced 24-27 more eggs than imported strain on the hen-housed basis. Feed requirement per 1㎏ egg production was similar between crossbed and imported strain. On the basis of the results of this study, to make maximum heterosis for egg production, it is recommended that Colonial inbred strain female should be cross with male of Sung Hwan, Darvy and Dembro strains.

Saanen 종과의 누진교잡에 의한 재래산양 개량시험 제2보 , Saanen 종과 재래산양의 교잡종에 대한 비유능력의 변화

이길왕,최광수,탁태영,설동섭,이기만 ( K . W . Lee,K . S . Choi,T . Y . Tak,D . S . Sul,K . M . Lee ) 한국축산학회 1975 한국축산학회지 Vol.17 No.1

The data from 393 purebred and crossbred goats produced by matings of Korean Native Goats and Saanen, which were investigated at Livestock Experiment Station since 1963, were analyzed by least-square method to investigate changes of milking performance of the Korean Native Goats by grading up with the Saanen. This procedure adjusted the measurement data for surveyed year, parity, mating system and for the number of kid born at one birth. The results obtained are as follows. 1. The milk productions of the Korean Native Goats, the first filial, the second, and the third graded generations were 423.91, 90.97, 288.12, 354.81 and 372.76㎏, respectively. Their milk fat percentages were 4.15, 5.72, 5.37, 4.30 and 4.24, respectively. Their lactation periods were 239.7, 173.2, 214.3, 236.2 and 234.2 days, respectively. 2. The milk performances of the first filial, the second, the third graded generation and Saanen were significantly higher than those of Native Goats. The increment of milk character is the filial, the second, and the third graded generation, compared to the Native Goats were 197.15, 263.94 and 281.79㎏ in milk production; 41.14, 63.05 and 61.05 days in lactation period; -0.34, -1.42 and -1.48% in milk fat percentage. 3. The difference of milk production, lactation period and milk fat percentage between the third and the second graded generation was 17.89㎏, -2.00 days and -0.06, respectively. The difference between purebred Saanen and the third graded generation was 51.15㎏ for milk production, 1.55 days for lactation period, and -0.08% for milk fat percentage. However there was no significant difference between them. 4. The individual comparisons among the least square estimates showed that the difference between the 3 and 1 kid per birth was 130.4㎏ for milk production, 29. 4 days for lactation period, and -0.7% for milk fat percentage. The difference between the 3 .and 2 kid per birth was 3.13㎏, 11.6 days and 0.02%, respectively. The difference between the 2 and 1 kid per birth was 41.6㎏, 17.8 days and 0.09%, respectively.

토끼의 수정란 이식에 있어서 난세포 분열기와 이식부위에 관한 연구

김중계,서국성,신원집,오연각,설동섭,김상철,이용빈 ( J . K . Kim,G . S . Suh,W . J . Shin,Y . K . Oh,D . S . Sul,S . C . Kim,Y . B . Lee ) 한국축산학회 1974 한국축산학회지 Vol.16 No.1

This experiment was carried out to study a suitable method of fertilized ova transfer in the rabbit. A total of 160 ova at 2 to 16 cell stages or at 16 cell to morula stages from superovulated donors were transferred at the rate of 8 per animal to the fallopian tubes and uterus of 20 recipient females, mated 24 hrs. earlier to vasectomised male. Irrespective of the site of transfer, the proportion of ova developing to term following 16 cell to morula stage transfers was more than that following 2-to 16 cell stage transfers. And uterus transfers were more successful than fallopian transfers in both 2 to 16 cell stages and 16 cell to morula stages. The results with 16 cell to morula stage transfers at the uterus were better than those in any other groups. Fourteen of 20 recipients became pregnant, of which il produced a total of 32 offsprings, and litter size averaged 2.9 with variation from 1 to 6.

난용도입계의 우량교배조합 선발시험

정선부(S. B. Chung),설동섭(D. S. Sul),오봉국(B. K. Oh) 한국육종학회 1971 한국육종학회지 Vol.3 No.2

966The study was carried out to select the superior laying hens by crossing of 5 White Leghorn strains. The colonial strain females which were imported from U. S. in 1967 were crossed with 4 different inbred strain male of White Leghorn. Body weight at 8 weeks, at first egg, at 300 and 500 days were heavier in crossbreeds than in imported strain. Age at first egg was similar in crossbred and in imported strain. The egg weight of crossbreeds (58.78g) was heavier than mid-parents but lighter than imported strain (60.57g). Crossbred, except M×C, produced 24-27 more eggs than imported strain#on the basis of hen-housed. Feed requirement per 1 ㎏ egg production was similar between crossbred and imported strain. On the basis of the results of this study, to make maximum heterosis for egg production, it is recommended that Colonial inbredstrain female should be cross with male of Sung Hwan, Darvy and Dembro strains. 1967년에 미국에서 도입한 백색레구혼코로니 알계통 원종계의 우수한 교배조합을 선발하여 우수한 산란계를 일반 양축가에게 보급할 수 있는 자료를 얻고저 1969년 3월부터 1970년 8월까지 도입계코로니 알계통을 모계로 하고 그외 4계통의 근친계를 부계로 하여 본시험을 실서 하였다. 8주령체중 초산시체중 300일 및 500일령 체중에 있어서 교태종이 무거웠다. 초산일령에 있어서는 교배종이 167~176일로서 도입계의 초산일령 168일과 비슷하였다. 란중은 교배종 58.87g으로서 양친평균보다는 무거웠으나 도입계의 60.57g 보다는 가벼웠다. 500일령 Henhoused 산란지수는 교배종 M×C구를 제외하고는 194~197개로서 도입계보다 24~27개 많았다. 사료요구율에 있어서는 도입계와 교배구간에 큰 차가 없었으며 생존율에 있어서도 육성율을 제외하고는 교배종과 도입계간에 별 차가 없었다. 이상의 결과로 보아 도입계 코로니알 계통은 성환계통(S), 다-비계통(B), 뎀부로계통(A) 등과 교배하여 사육하는 것이 좋을 것으로 생각된다.

Broiler 용추에 대한 탤로의 첨가효과에 관한 연구

지규만 ( K M Chee ),이인형 ( I H Lee ),이영상 ( Y S Lee ),설동섭 ( D S Sul ) 한국축산학회 1968 한국축산학회지 Vol.10 No.1

This experiment was carried out to investigate the feeding effects of bleachable fancy tallow and to determine the proper supplementation level of tallow in broiler diets. Two trials involving lots (Control, Test 1, Test 2) of 120 male and female Nichols chicks with 2 replications fed 24% level of protein in each trial conducted for 8 weeks. Starters were given to chicks from 1 day of age to 4 weeks of age and finishers from 5 to 8 weeks of age. Tallow was supplemented to each experimental diets at the levels of 0, 4 and 8% in starter and 0, 5 and 10% in finisher replacing ground yellow corn and soybean oil meal. Calorie-protein ratios based on metabolizable energy were 57.9, 58.2 and 60.2 in starter and 60.9, 64.4 and 66.0 in finisher, respectively. No significant differences were observed in growth rate and feed intake. Feed conversion, however, was improved by 3.9 and 8.3% in female Test 1 and Test 2, respectively and by 4.9 and 6.3% in male Test 1 and Teat 2. The differences in feed conversion efficiency were significant only in male at the level of 5% but the difference between Test 1 and Test 2 and was not significant.

홀몬처리가 산양의 다태아 분만에 미치는 영향

김창근 ( C K Kim ),김상철 ( S C Kim ),이용빈 ( Y B Lee ),설동섭 ( D S Sul ),오연각 ( Y K Oh ),서국성 ( G S Suh ),김중계 ( J K Kim ) 한국축산학회 1972 한국축산학회지 Vol.14 No.2

The ovulation rate and follicle development were observed in 18 goats by laparotomy on the third day after injection of 500, 750 or 1,000 I.U. PMS. Fecundity was also observed in other 17 goats treated with 500, 750 or 1,000 I.U. PMS and mated naturally on the 17th day of the estrous cycle. The ovulation rate was 1.5 (1∼3), 2.5 (1∼4) and 3.2 (2∼5) in the goats receiving 500, 750 or 1,000 I.U. PMS, respectively, and it was found significantly (P$lt;0.05) mare in 1,000 I.U. PMS than in 500 I.U. PMS. However, there were no significant differences in the number of follicles with 5mm or larger diameter and hemorrhagic follicles between the groups. Fecundity was 2.0, 2.25 and 2.0 in the goats receiving 500, 750 and 1,000 I.U. PMS, respectively. The single, twin, triplet and quadruplet births were 23.5%, 52.7%, 17.7% and 5.9%, respectively. One still birth and 2 premature births were observed. The shorter gestation period of goats and the lighter birth weight of kids resulted from the higher fecundity.

돼지의 개량체계에 따른 유전적 개량에 대한 고찰

도창희(C . H . Do),박영일(Y . I . Park),설동섭(D . S . Sul),홍기창(G . C . Hong),정영철(Y . C . Jung),박태진(T . J . Park),탁태영(T . Y . Tahk) 한국축산학회 1995 한국축산학회지 Vol.37 No.6

Contemporary comparison and BLUP animal models were used for genetic evaluations, and selection was practiced within and across herds in the simulated single breed populations to investigate genetic improvement. Each simulated population consisted of approximately 2.01 head of breeding sows from 10 herds, and various performance test size per litter were simulated for backfat thickness, feed efficiency and daily body weight gain. Increase in the selection index per year from selection within the herd by the BLUP animal model evaluation was about 7 limes higher than from selection within the herd by contemporary comparison. The increase was approximately 10 times higher when the BLUP animal model genetic evaluation and electron across herds were simultaneously practiced. For the BLUP animal model of genetic evaluation, increase in the performance test size per litter significantly contributed to genetic gain.