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RISS 인기검색어
- 검색키워드
- 저자 : 김낙환(N. H. Kim) (검색결과 13 건)
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김낙환(N . H . Kim),박주완(J . W . Park),정영철(Y . C . Jung),박영일(Y . I . Park) 한국축산학회 1992 한국축산학회지 Vol.34 No.3
Three different crosses, Y × L, D × YL and DY × YL were performance tested to compare the body weights at different ages, average daily gains, feed effiency, dressing percent, carcass length, backfat thickness, marbling score, lean meat percent and growth pattern. A total of 101 barrows and gilts were tested to an average final weight of 109 ㎏. The pigs were allowed free access to creep feed from 10 days of age and were full fed from weaning at 25 days to the final weight. Average daily gains and feed effiency were best in D × YL, followed in rank by DY × YL and Y × L. The body weight at 32, 70, 90, 110, 130 and 150 days of age were highest in D × YL. The lower average daily gains, poor feed effiency and smaller body weights of Y × L at different ages as compared with D × YL and DY × YL were considered to be due mainly to the difference in level of maternal heterosis. The Y × L had higher dressing percent and lean meat percent, longer carcass and thinner backfat than the other two crosses. The DY × YL tended to have slightly more intra-muscular fat. The equation derived to estimate the growth curve was Log_e W = 47.5327 - 34.3029 × LogeD + 8.2993 × (Log_eD)² - 0.6326 × (Log_eD)³ (R²= 0.9718) for Y × L barrows, Log_e W=0.1764 + 0.1284 × (Log_eD)² - 0.0000002 × D³ + 0.0123 × D (R² = 0.9836) for D × YL barrows, Log_e W = 0.1764 + 0.0123 × D - 0.0000002 × D³ + 0.1284 × (Log_eD)² (R² = 0.9851) for DY × YL barrows and Log_e W = 25.8570 - 19.4688 × Log_e D + 4.9968 × (Log_eD)² - 0.3920 × (Log_e D)³ (R² = 0.9903) for DY × YL gilts.
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김낙환(N . H . Kim),김성훈(S . H . Kim),정영철(Y . C . Jung),박영일(Y . I . Park) 한국축산학회 1992 한국축산학회지 Vol.34 No.3
The data from 3,366 litters of pigs farrowed from November. 1988 to April, 1991 at J Swine Breeding Farm in Icheon, Kyunggi Province were statistically analysed by least squares method to compare the reproductive performance of eight different crosses, D × YL, D × LY, D × DYL. D × DLY, Y × DYL., Y × DLY, Y × L and L × Y. The 3-breed crosses, D × YL and D × LY had the best performance in the number born alive per litter and in the number suckled per litter. Y × DLY, D × YL and D × LY had the largest number born per litter. Of the multiple crosses produced by the 3-breed cross females, D × DYL, Y × DLY and Y × DYL had relatively good performance. The number of stilborn pig per litter was largest in Y × DLY.
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유전 및 육종 : 젖소의 체세포 지수와 생산형질에 대한 환경효과와 유전모수의 추정
김낙환(N . H . Kim),정종현(J . H . Jung),김시동(S . D . Kim),최유림(Y . L . Choi),이일주(I . J . Lee),한광진(K . J . Han),박영일(Y . I . Park) 한국축산학회 2001 한국축산학회지 Vol.43 No.4
Effects of environmental factors and genetic parameters for somatic cell score(SCS) and production traits were estimated based on 4,722 records of Hostein cows at 113 test farms measured from January, 1994 to June, 1999. Calving year, calving season, cooperative and farm had significant effects on the five traits studied, SCS, milk, fat, protein and SNF(solid not fat) production, except for the farm effect on protein production. The SCS was significantly higher in the cows calving in summer than in other seasons. Milk production was highest in the cows calving in winter and lowest in summer. Heritabilities estimated by multiple trait animal model were 0.03, 0.28, 0.28, 0.30 and 0.29, respectively for SCS, milk, fat, protein and SNF production. Genetic correlations of SCS with milk, fat, protein and SNF production estimated were 0.18, 0.21, 0.25 and 0.22, respectively. Genetic correlations among fat, protein and SNF production were positive and high. Phenotypic correlations of SCS with milk, fat, protein and SNF production estimated were very low.
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