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Gene Flow 방법을 이용한 점근선적 선발반응 추정
전광주 ( G . J . Jeon ) 한국축산학회 1992 한국축산학회지 Vol.34 No.4
The use of the gene flow method was illustrated using a simple numerical example in this work. The main advantage of the gene flow method is an ability to monitor the entire trend of genetic progress during a given time horizon for a breeding scheme. The use of gene flow model is useful and effective for the estimation of selection response especially when a time horizon of a breeding plan is short. And the gene flow model also can be easily extended to any general breding population of all livestock species.
유전적 개량 극대화를 위한 유우 및 육우의 이상적인 후대검정두수
전광주(G . J . Jeon),김형철(H . C . Kim),나기준(K . J . Na),조병대(B . D . Cho) 한국축산학회 1995 한국축산학회지 Vol.37 No.3
Optimum number of progeny for given capacities of progeny test size was examined by deterministic models using various levels of heritabilities and population sizes. The theoretical maximum genetic improvement is possible by maximizing the function of selection accuracy, selection intensity, and genetic variation of the traits of interest. To estimate the optimal progeny test breeding schemes. The elements in the function of genetic response are interrelated. And thus, the algorithm used in this study was that the implicit equation was solved iteratively. The results suggested that for an economic trait with heritability of 0.3, given the size of progeny test station with 3,000 breeding females and 33 proven sires to be selected annually, the optimum number of young bulls to be progeny tested was 100 and the number of progeny per bull was 10.
전광주(G . J . Jeon),김태산(T . S . Kim) 한국축산학회 1994 한국축산학회지 Vol.36 No.3
Estimation of linkage between QTL and genetic markers was illustrated using simulated data by the ML method. The application of the ML method was sraight forward. For a given density function, the likelihood function was evaluated at each round of iteration within the parameter space. After iterations were completed, the largest value of likelihood was the point at which the likelihood converged. The magnitude of h² did not show any significant effect on the estimation of linkage between QTL and markers. However, the additive effect of marker allele had a significant effect on the estimation of r. As the value of marker allele was larger, the linkage was underestimated. Since the dominance effect was not considered in the simulation, further investigation is needed to find possible interactions between the magnitude of the dominance. effect and marker effect.
한우 종모우와 지역별 한우 집단의 유연관계와 유전적 구조 분석
오재돈(Jae-Don Oh),전광주(Gwang-Joo Jeon),이학교(Hak-Kyo Lee),조병욱(Byung-Wook Cho),이미랑(Mi-Rang Lee),공홍식(Hong-Sik Kong) 한국생명과학회 2008 생명과학회지 Vol.18 No.10
본 연구는 10개의 Microsatellite를 이용하여 국내 한우집단 586두(경기: 100, 전남: 100, 전북: 100, 경남: 100, 경북:86, 강원: 100)와 보증종모우 집단(39두)간의 유전적 거리추정 및 계통지도의 작성을 통해 보증종모우 집단과 지역별 한우집단의 유전적 특성과 유연관계 분석을 실시하였다. 10개의 MS marker의 분석 결과 기대이형접합도의 경우 경남지역에서 가장 높은 0.780을 나타내었으며 종모우 집단에서 가장 낮은 0.760을 나타내었다. 관측된 이형접합도의 경우 종모우 집단에서 가장 높은 0.818을 나타내었으며 경북지역에서 가장 낮은 0.721을 나타내었다. 검출된 대립유전자의 수에서는 경남지역(11.1)이 가장 높았고, 종모우 집단(7.9)이 가장 낮은 것으로 확인 되었다. 종모우 집단은 가장 높은 관측이형접합도를 나타냈음에도 불구하고 가장 낮은 대립유전자의 수를 나타내고 있음을 확인하였다. 7개의 집단 간의 유전적 유연관계 분석한 결과 강원도 집단의 한우와 경기, 경북의 유전적 거리가 각 0.021로 가장 가까운 것으로 확인 되었으며 경기와 경북 간의 유전적 거리는 0.032인 것으로 가장 먼 것으로 확인 되었다. 또한 경북은 전남과도 0.032의 먼 유전적 거리를 나타내고 있음을 확인하였다. 종모우 집단의 경우 각 지역별 집단 간의 유전적 거리에 비해 상당히 큰 차이의 유전적 거리를 나타내고 있는데 이는 각 지역별 암소집단에 소수의 종모우를 이용해 계획 교배를 실시하고 있어 나타난 것으로 사료된다. 각 개체들 간의 유전적 거리에 대한 추정값을 계산하여 개체별 분지도를 작성한 결과 같은 지역 내의 몇몇 개체들이 그룹을 이루어 존재하기는 하지만 일반적으로 넓게 분포되어 있어 각 지역별로 그룹을 이루어 존재하고 있다고 보기엔 어려움이 있음을 확인 하였다. 반면 종모우 집단의 경우 크게 두개의 그룹을 이루어 분지도 내에 분포하고 있음을 확인 할 수 있었다. 따라서 종모우의 유전적 배경이 상당히 좁게 나타나고 있음을 확인 할 수 있었으며 이러한 결과로 인해 국내의 유전자원의 다양성이 작아질 수도 있을 것으로 추정된다. 따라서 국내 유전자원의 다양성 보존을 위해 종모우의 선발 및 사업 추진에 있어 대책을 마련하기 위한 고찰이 진행되어질 필요가 있는 것으로 사료된다. Seven populations of 586 Hanwoo have been characterized by using 10 microsatellite DNA markers. Size of microsatellite markers decided using GeneMapper Software (v.4.0) after analyze in kinds of ABI machine of name of 3130. Frequencies of microsatellites markers were used to estimate heterozygosities and genetic distances. Genetic distances between populations were obtained using Nei's DA distance method. Expected heterozygosity between each population was estimated very analogously. Genetic distances (0.0413) between Kangwan (KW) and Gyonggi (GG), Jeonpuk (JP) were nearest than distances between other populations by 0.021. Genetic distances between Gyonggi (GG) and Kyongpuk (KP) showed far distance than other populations by 0.032. In the UPGMA tree that is made based on DA distance matrix. Each individuals were not ramified to different group and were spread evenly in phylogenetic dendrogram about all Hanwoo of each regional area populations. But Hanwoo proven population was ramified to different group.
생체에서 초음파 측정기를 이용한 한우 도체형질의 추정에 관한 연구
김형철(H . C . Kim),전광주(G . J . Jeon),나기준(K . J . Na),유영모(Y . M . Yoo),정재경(J . K . Chung) 한국축산학회 1995 한국축산학회지 Vol.37 No.4
The carcass traits in live Hanwoo were estimated using the ultrasonic color scanning scope. A total number of 229 bull and steer records were measured. The data were collected for two years from 1992 to 1993. `Ihe estimates of backfat thickness using ultrasonic measurement from live animals for bulls and steers were 0.5㎝ and 0.91㎝, respectively, and those of slaughter measurement were 0.48㎝ and 0.91㎝, correspondingly. And also, the similar results were found for eye muscle area(EMA). The blue dot percentage indicating the marbling score tended to increase from 18 month of age to 21 month of age. The prediction equation using the linear regression were highly accurate for meat quantity(R²=0.91 to 0.93) but was less accurate for meat quality(R²=0.4).
도창희(Chang Hee Do),전광주(Gwang Ju Jeon),이학교(Hak Gyo Lee),이정규(Jung Gyu Lee) 한국축산학회 1994 한국축산학회지 Vol.36 No.5
Herd, calving year and season have relatively highly variable effects on milk production traits of dairy cattle and seem to be suitable with the characteristics of random effect. For a statistical approach to estimate these effects, computational ease in estimating fixed contemporary group effects and accuracy in estimating random contemporary group effects for small numbers of observations in groups should be compared. For a genetic evaluation with small herd sizes and the relatively small registered and tested dairy cattle population in Korea. the contemporary group effects should be treated as random and the flexible grouping strategy insuring maximization of homogeneiety in subgroups would be a proper choice, because of accurate prediction of additive genetic effect is and less of a loss of information from records.
한우의 경제형질들과 관련한 유단백 유전자와 성장호르몬 유전자의 효과
조병욱,황규춘,이득환,이학교,전광주,한재용 ( B . W . Cho,K . C . Hwang,D . H . Lee,H . K . Lee,G . J . Jeon,J . Y . Han ) 한국축산학회 1998 한국축산학회지 Vol.40 No.2
Milk protein genes and growth hormone gene have been targeted as modulator genes in growth and carcass traits. With the objectives to detect some correlation or genotypic effect of three known functional genes on economic performance, 19 sires and their 139 progenies of Hanwoo population were genotyped for κ-casein, β-lactoglobulin and growth hormone(GH) loci by polymerase chain reaction(PCR)-restriction fragment length polymorphism(RFLP) analysis. The growth traits, such as Body Weight and Average Daily Gain, and carcass traits of this population were analysed for possible association with three genetic loci. The frequency of B allele for κ-casein was 0.37 in Hanwoo and 0.23 for β-lactoglobulin. Among the analysed loci, κ-casein gene was found most significantly associated with the growth traits of economic importance. However, the ,β-lactoglobulin and GH did not show significant effects in Hanwoo. For carcass traits, effects of κ-casein were significant in EMA. Therefore, genotyping the candidate animals for κ-casein in Hanwoo can be of great benefit in selection programs.