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Holstein 종 유우의 산유형질에 대한 유전력과 유전상관 추정에 관한 연구
상병찬,조윤연,지병천 ( B . C . Sang,Y . Y . Cho,B . C . Chee ) 한국축산학회 1986 한국축산학회지 Vol.28 No.4
This study was conducted to estimate the heritabilities, genetic and phenotypic correlations among milk production traits on the basis of 1954 records from 522 Hostein cows produced from 54 sires at National Animal Breeding Institute from 1970 to 1981. The results obtained in this study are summarized as follows: 1. Total milk yield, 305 day milk yield, milk fat yield, fat percentage, peak yield, lactation period and days of peak yield were 4,699.49±1,467.41㎏, 4,940.58±1,221.98㎏, 179.24±17.68㎏, 3.57±0.34%, 24.44±5.77㎏, 301.44±71.97 days and 44.03±29.33 days, respectively. 2. The heritability estimates were 0.228±0.064 for total milk yield, 0.272±0.072 for correction milk yield, 0.236±0.066 for milk fat yield, 0.383±0.089 for fat percentage, 0.181±0.056 for peak yield, 0.104±0.042 for lactation period and 0.203±0.060 for days at peak yield. 3. The estimate of genetic correlation between 305 day milk yield and milk fat yield, fat percentage, peak yield, lactation period and days at peak yield were 0.902,-0.087,-0.030, 0.301, 0.013, respectively. And genetic correlation coefficients between milk fat yield and fat percentage, peak yield, lactation period and days at peak yield were 0.586,-0.222, 0.379 and 0.014, respectively.
돼지 동결정액 중의 정자농도가 수태율 및 산자수에 미치는 영향
김학규,정행기,이수헌,이광원,김인철,최진성,지병천,김경남,박창식 韓國受精卵移植學會 1996 한국동물생명공학회지 Vol.11 No.1
This study was carried out to investigate the effect of sperm concentration of 5ml maxi-straw on farrowing rate and number of pigs born alive per litter in deep frozen boar semen. We did not find out the effect of sperm concentration on post-thaw sperm motility and NAR acrosome. However, farrowing rate and number of pigs born alive per litter of 7. 5 x 10º /5ml and 10.0 x 10º /5m1 sperm concentrations were higher than those of 5. 0 /10º /5ml sperm concentration.