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상병찬,안병석,박무균,박태진,강만석,이정규,지설하 ( B . C . Sang,B . S . Ann,M . K . Park,T . J . Park,M . S . Kang,J . G . Lee,S . H . Chee ) 한국축산학회 1985 한국축산학회지 Vol.27 No.6
This study was conducted to estimate the heritabilities and genetic correlations among postweaning traits in swine. The heritabilities estimated were 0.270 for daily gain, 0.350 for feed requirement, 0.272 for backfat thickness, 0.887 for days to 90㎏ and 0.565 for selection index. The genetic correlations of daily gain with feed requirement, backfat thickness, days to 90㎏ and selection index were -0.552, 0.107, -0.903, 0.716, and feed requirement with backfat thickness, days to 90㎏ and selection index were -0.058, 0.099, -0.942, and backfat thickness with days to 90㎏ and selection index were -0.237, -0.025, respectively.
토끼에 있어서 번식능력에 영향을 미치는 품종및 환경요인에 관한 연구
이학교(H . K . Lee),류충현(C . H . Ryu),최진성(J . S . Choi),강만석(M . S. Kang) 한국축산학회 1988 한국축산학회지 Vol.30 No.12
This study was conducted to estimate the effect of breed. year of kindling, season of kindling and month of age at kindling on the reproductivity in does. The data used in this study were obtained from total 4,024 litters of New zealand white (2,302 litters) and Californian (1,722 litters) raised at the Animal Breeding Institute from 1978 to 1986. The results obtained are summarized as follows: l. Significant (P$lt;0.05) differences were detected for born number, litter size at 21-day and at weaning among the breeds, kindling seasons and years, respectively. Except for growth rate from birth to 21 days of age, linear regression for month of age at kindling affected litter size and growth rate significantly (P$lt;0.01). 2. Breeds affected kitling weight at 21-day and at weaning significantly (P$lt;0.01). Years and seasons affected litter weight at 21-day and at weaning significantly (P$lt;0.01). 3. Breeds affected gestation length significantly (P$lt;0.01). The gestation length least-square means were 31.2±0. 18 and 31.8±0.27 in New zealand, Californian breed, respectively. Breed and season affected within-litter uniformity significantly (P$lt;0.01). Least-square means of within-litter uniformity over all litters studied was 12.0+1.12%.
돼지에 있어서 이유전 형질과 이유후 형질에 대한 유전모수 추정
이학교,최진성,김인철,박종대,강만석 ( H . K . Lee,J . S . Choi,I . C . Kim,J . D . Park,M . S . Kang ) 한국축산학회 1989 한국축산학회지 Vol.31 No.4
This study involved the records of 389 heads of Duroc, Hampshire, Large Yorkshire and Landrace boars tested at National Breeding Institute from 1980 to 1987. The Purpose of this analysis was to investigate the relationship between preweaning traits and postweaning traits. Preweaning and postweaning traits studied were; the number of live pigs in the litter in which the boar was born(LSBNA) and weaned(LSWN); his birth weight (BW), weight at 21days of age(GW21D), Weaning weight(WW56D); average daily gain(ADG), backfat thickness (BFT), feed Requirement(F/R), the days to 90㎏(90DAYS), IOWA-INDEX(INDEX). The heritabilities and genetic and phenotypic correlations were estimated from the sire components of variance and covariance. 1. Heritabilities estimated were 0.521±0.188(ADG), 0.219±0.169(F/E), 0.459±0.181(BFT), 0.91±0.215(90 DAYS), 0.337±0.173(INDEX), 0.371±0.312(LSBNA), 0.261± 0.191(LSWN), 0.174±0.153(BW), 0.208±0.157(GW21D) and 0.268±0.163(WW56D), respectively. 2. Genetic correlation of performance index (INDEX) with (BW), (GW21D), and (WW56D) were 0.326, 0.460 and 0.169, respectively, Phenotypic correlation of (INDEX) with (BW), (GW21D) and (WW56D) were 0.145, 0.065 and 0.076, respectively. Genetically (BW), (GW21D) and (WW56D) of the preweaning traits tended to show positive relationship with postweaning traits. These result indicated that the better growth rate at early stage tended to have a better performance.
돼지 수정란 이식에 관한 연구 1 . 발정동기화 및 과배란유기
손동수(D . S . Son),이광원(K . W . Lee),최진성(J . S . Choi),김경남(K . N . Kim),강만석(M . S . Kang),지설하(S . H . Chee),박창식(C . S . Park) 한국축산학회 1987 한국축산학회지 Vol.29 No.12
This study was carried out to investigate the effect of synchronization of estrus and induction of superovulation after administration of altrenogest, PMSG and HCG in the multiparous sows weaned at 50-56 days. A total of 100% of the treated sows exhibited estrus within a four-day period. The average number of ovulation points per sow among superovulated breeds such as Landrace, Large White, Duroc and Hampshire was between 17.6 and 24.0.