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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.
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.
한국 재래 닭의 Uncoupling Protein 유전자 Exon 3에서의 +1316 T/T 유전자형이 산란율에 미치는 효과 분석
오재돈,이제현,홍윤숙,이성진,이승규,공홍식,상병돈,최철환,조병욱,전광주,이학교,Oh J. D.,Lee J. H.,Hong Y. S.,Lee S. J.,Lee S. G.,Kong H. S.,Sang B. D.,Choi C. H.,Cho B. W.,Jeon G. J.,Lee H. K. 한국가금학회 2005 韓國家禽學會誌 Vol.32 No.4
Uncoupling protein(UCP)은 갈색 지방세포에서 특이적으로 발현하고 있으며 복잡한 세포의 열 생산 작용에 관여한다고 알려져 있다. 본 연구는 한국 재래 닭 집단의 UCP 유전자 내에 존재하는 SNP를 검출하였다. 한국 재래 닭 집단의 UCP유전자 exon 3지역의 염기서열 분석 결과 1316 bp에서 T염기가 C염기로 치환되어짐을 확인하였다. T+11316C 지역의 PCR-RFLP 분석을 위해 제한효소 Afl III를 사용하였다. 한국 재래닭 집단내 유전자형 빈도는 TT가 0.7875, TC가 0.1875 그리고 CC가 0.025로 검출되었으며 대립유전자의 빈도는 T가 0.881 그리고 C가 0.119로 나타났다. 또한 검출된 SNP가 경제형질에 미치는 영향을 분석한 결과 한국 재래 닭 집단의 T/T 유전자형과 C/C유전자형에서 일당 산란율에서 통계적으로 유의한 차이가 있음을 확인하였다. 본 연구의 결과는 향후 더 많은 UCP 유전자와 관련된 연구와 한국 재래 닭의 육종 전략에 도움이 될 것으로 사료된다. Uncoupling protein(UCP) is expressed exclusively in brown adipose tissue(BAT). It is blown to uncouple phosphorylation from oxidation and hence to be involved in energy metabolism and heat production, especially under cold exposure. In the present study, we identified single nucleotide polymorphism(SNP) in exon 3 of avUCP gene in Korean native chicken(KNC) population. It was detected a SNP T+1316C in exon 3 of avUCP gene by sequence analysis in KNC population. For PCR-RFLP analysis of the SNP T+1316C, used by AP III restriction enzyme. The result of PCR-RFLP analysis showed that allele T has two fragments of 255 bp and 86 bp, and allele C has only one fragment of 341 bp. The genotype frequencies were TT type, 0.7875; TC type, 0.1875 and CC type, 0.025; and the frequencies of allele T and C were 0.881 and 0.119, respectively in KNC population. Next study was conducted to investigate the effect of the SNP in avUCP gene on economic traits in the KNC population. The TT genotype had a significant higher daily percent lay(84.61) than CC genotype(p<0.05) in KNC population. This study may be useful for genetic studies of avCUP gene and selection on daily percent lay of KNC.
한우와 Charolais 교잡종의 체중에 대한 상가적 및 잡종강세효과의 추정
나기준(K . J . Na),전광주(G . J . Jeon),김형철(H . C . Kim),조병대(B . D . Cho),이근상(K . S . Lee) 한국축산학회 1995 한국축산학회지 Vol.37 No.2
The additive and heterosis effects on body weights between Hanwoo(Korean cattle) and crossbreeds from Charolais x Hanwoo were estimated. The data were recorded from 1979 to 1991 in Kangwha area and were analysed by using linear regression models. The estimated least squares means on body weights of Hanwoo were 85.4±4.6 ㎏ at 3 months of age. 150.2±6.9 ㎏ at 6 months of age and 258.5±11.4 ㎏ at 12 months of age, respectively. The body weights of the crossbreeds ranged from 117.1 to 126.3㎏ at 3 months of age, from 192.0 to 216.8 ㎏ at 6 months of age, and from 352.6 to 383.4 ㎏ at 12 months of age, respectively. The additive effects on body weight were 45.59±6.37 ㎏ at 3 months of age, 78.75±10.13 ㎏ at 6 months of age and 136.27±17.69 ㎏ at 12 months of age. The effects of heterosis were 7.65±3.89 ㎏ at 3 months of age, 21.35±6.09 ㎏ at 6 months of age and 47.47±10.92 ㎏ at 12 months of age, respectively.