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배반엽성세포를 이용한 카이메라 닭 ( 화이트레그혼 ↔ 오골계 ) 생산
서동삼(D . S . Seo),홍영호(Y . H . Hong),최강덕(K . D . Choi),양무희(M . H . Yang),신영수(Y . S . Shin),한재용(J . Y . Han) 한국축산학회 1995 한국축산학회지 Vol.37 No.1
The chicken embryo contains 30,000 to 60,000 cells at development stage X, the blastodermal cells at this stage are believed to he pluripotent and subsequently contribute to melanocytes derived from the neural crest, to erythrocytes and to germ cells. In this study, blastodermal cells were isolated from stage X embryos of Korean Native Ogol Chicken (KNOC). The isolated blastodemial cells were transfected with liposome and dispersed by pipetting. A 2㎕ volume of cell suspension was microinjected into the subgerminal cavity of recipient embryos at an equivalent stage of development of the donor and recipient. Of the 332 White Leghorn embryos that were injected with KNOC blastodermal cells, three unhitched embryos were phenotypically chimeric with respect to feather color and one embryo hatched. This technique may be useful in development of a transgenic chicken production system.
돼지의 혈청 Insulin-like Growth Factor-I과 산자수간의 연관성 연구
양성호,서동삼,박희복,김기동,강창원,최광수,박성수,홍기창,고용,Yang, S.H.,Seo, D.S.,Park, H.B.,Kim, K.D.,Kang, C.W.,Choi, K.S.,Park, S.S.,Hong, K.C.,Ko, Y. 한국동물번식학회 1999 Reproductive & developmental biology Vol.23 No.3
The litter size has been the primary interest of economic traits in pig reproduction. It has been recently shown that insulin-like growth factor-Ⅰ(IGF-Ⅰ) plays roles in establishing pregnancy and in supporting fetal growth and development. But, the effect of serum IGF-Ⅰ on litter size has not been studied. Therefore, this study was conducted to relate serum IGF-Ⅰ concentration with porcine litter size and to investigate the possible connection with estrogen receptor(ER) as a candidate gene for the litter size. Sera during day 45 to 105 of pregnancy were collected from two groups showing high and low litter size and serum IGF-Ⅰ concentration was measured by radioimmunoassay (RIA). IGF-Ⅰ levels in both groups decreased gradually as pregnancy stage proceeded but were not significantly different. Secondly, DNA was extracted from blood and PCR-RFLP was utilized to analyze ER genotypes of pigs in each group, which produced three polymorphic patterns. Based on the ER genotypes analyzed, low litter size group showed higher IGF-Ⅰ concentration than high litter size group. Taken together, the results indicate that the serum IGF system was correlated with steroid system but not with the litter size in pigs. Thus, this study implies that porcine litter size could be determined locally at the ovary level.