홀스타인 젖소에 있어서 수정란 생산에 미치는 제요인 효과

김내수,안병석,고문석,김준식,손동수,김일화,이광원 한국축산학회 1997 한국축산학회지 Vol.39 No.1

The data set of 75 records of Holstein dairy cow donors bred in the National Livestock Research Institute from 1993 to 1995 was used to estimate effects of various factors on embryo recovery. The embryo recovery of superovulated tows was not affected by the factors such as sire of donor cow, breeding years, repeated superovulation and parity of donor cows. However, the production of total embryos and the first gale embryos were decreased significantly(p$lt;0.01) as the donor cows were tested to be higher in milk yield. Least square means of number of embryos according to breeding years and those by repeated superovulations were 9 to 16, 11 to 14 embryos, respectively. Total embryos as well as non-frozen embryos were tend to increase with donor's parity increase. Number of total collection of embryos decreased in opposition to the increase in the milk yield of the donor cow. It decreased by -2.2±0.8 embryo for total embryos, and by -1.1±0.4 embryo for first grade and by -0.5±0.4 for second Bade as milk yield increased by 1,000 ㎏.

육계 성장에 있어서 임박과 대두박의 사료적 가치의 비교 시험

김내수 충북대학 대학원 1977 大學院論文集 Vol.3 No.-

본문참고

농후사료 급여수준이 거세 한우의 증체와 부위별 지방조직의 지방산 조성에 미치는 효과

김내수,원유석,송만강,최양일,최성호,정재경,정정수 한국동물자원과학회 2000 한국축산학회지 Vol.42 No.6

The study was conducted with 60 Hanwoo steer calves(7 month of age, mean body weight 139㎏) for 18 months performance to examine the effect of the feeding levels of concentrates on the growth performance and fatty acid composition of adipose tissues of various locations(subcutaneous, intermuscular and intramuscular fats). The Hanwoo steer calves were randomly allotted into 3 treatments according to the feeding levels of concentrates(85, 100 and 115%), and fed concentrates of Grower(7∼12 month of age), Finisher Ⅰ(12∼16 month of age), Finisher II(17∼20 month of age) and Finisher III(21 ∼25 month of age). The feeding levels of concentrates for the cattle of 85% or 115% were decreased or increased by 15%, respectively, up to 25 month of age based on the similar body weight to the cattle of 100%. The cattle were kept in an individual pen through the experimental period and were fed rice straw ad libitum. The cattle were slaughtered at the ages of 15, 18 and 25 months, and the adipose tissues collected were subjected to analyze the fatty acid composition. Growth of Hanwoo steers was not affected significantly by the feeding levels of concentrates, thus the lowered feed requirement was observed as the feeding levels of concentrates decreased. Overall mean dry matter intake concentrates, daily body gain and feed efficiency of Hanwoo steers up to 25month of age were 5.23㎏ , 0.75㎏ and 6.92, respectively. Fatty acids of palmitic acid(C_(16:0)) stearic acid(C_(18:0)) and oleic acid(C_(18:1)) in the adipose tissues of three locations of Hanwoo steers were dominated. The feeding level of concentrate did not affect the fatty acid composition. Percent composition of myristic acid was lowered in the order of subcutaneous, intermuscular and intramuscular fats. Relatively lowered values of C_(16:0) in the intramuscular and C_(18:1) and unsaturated fatty acids(USFA) to saturated fatty acids(SFA) in the intermuscular fats were observed. But increased tendencies of palmitoleic acid, C_(18:1) and linoleic acid were found from the subcutaneous, intermuscular and intramuscular fats, respectively. On the other hand, percent C_(18:0) slightly decreased but the ratio of USFA to SFA tended to increase with age.

덴마크의 양돈산업과 돈육수출

김내수,Kim, Nae-Su 대한양돈협회 1987 養豚 Vol.9 No.11

덴마크의 종돈개량

김내수,Kim, Nae-Su 대한양돈협회 1986 養豚 Vol.8 No.6

한우의 6개월령 및 12개월령 체중의 유전적 변화에 대한 모의실험

김내수,안병석,주종철 한국축산학회 1996 한국축산학회지 Vol.38 No.2

This study was conducted to obtain basic scheme to improve beef productivity in Korean cattle(Han-Woo). The simulated herd was consisted of 3 populations(2 sires and 20 dams per sub-population, 5 sires and 50 dams per sub-population, 8 sires and 80 dams per sub-population) made of 440 heads per population, respectively. Greater changes in gene frequency were observed in the population which consists of less sub-population and more cattle per sub-population than in the sub-population which has more sub-population and less cattle per sub-population, as simulation was continued. The frequency of homozygote increased significantly in the population which consist of greater number of sub-population having smaller heads of cattle, as were 0.594, 0.629 and 0.712 for population 1, 2 and 3, respectively. According to the change in the frequency of homozygote, inbreeding coefficient also increased in smaller size of sub-population as 0.189, 0.258 and 0.423 for population 1, 2 and 3, respectively. Heritabilities in the base population for the body weight at 6 and 12 month of age were 0.364∼0.365 arid 0.453∼0.466, respectively. But those values for the body weight at 6 and 12 month of age were changed to 0.408∼0.462 and 0.383∼0.558, respectively, at the end of simulation. Highest heritability was obtained from the population having greater number of small size sub-population. Correlation between phenotypic value for the body weight at 6 month of age and genotypic value for the body weight at l2 month of age was estimated to 0.60∼0.69, while that for the body weight at 12 month of age and the value for the body weight at l2 month of age was estimated to 0.60∼0.71. Genetic gains per year for the body weight at 6 month of age for population 1, 2 and 3 were estimated to 0.283, 0.352 and 0.335㎏, respectively, and those at 12 month of age were estimated to 0.674, 0.570 and 0.447, respectively.

성장월령에 따른 비거세 한우의 도체특성과 육질변화

김내수,원유석,송만강,최양일,정정수,이창림,정재경,임진희 한국축산학회 1999 한국축산학회지 Vol.41 No.6

The current study was undertaken to determine the effects of growing age on the carcass, meat quality and muscle fiber characteristics in Hanwoo bulls during the growing period of 6 to 30 months. A total of 54 heads of Hanwoo bulls (6 heads of 6 months, 12 heads each of 14, 18, 24 and 30 months) were conventionally slaughtered at each age, and then chilled overnight. The carcass characteristics and quality or yield grade (QG or YG) were determined on those carcasses, longissimus muscle (3Kg) was removed from left sides at 1st to 5th lumbar vertebrate and meat qualities or muscle fiber characteristics were evaluated. In the carcass characteristics of Hanwoo bulls, live weight, carcass weight and ribeye area except backfat thickness and dressing percent were increased(P $lt; 0.05) until 24 months of age. The backfat thickness was increased(P $lt; 0.05) from 18 to 24 months of age. The dressing percent was decreased(P $lt; 0.05) from 6 to 14 months, but thereafter slowly increased. Carcasses from 6 or 14 months of age showed A grade of YG, but carcasses from 18 to 30 months showed B grade. In QG, carcasses from 6 or 14 months showed `out of grade' and carcasses from 18 to 30 months showed grade 3 of QG, but the QG was not improved after the 24 months of age. In meat qualities of longissimus muscle, the pH and water-holding capacity tended to be similar except 18 months of age, and the meat color changed to red from 14 to 18 months of age. The shear force was increased(P $lt; 0.05) from 14 to 18 months, but after that decreased(P $lt; 0.05) at 30 months. In proximal analysis, the moisture content was decreased until 24 months of age, but the protein and fat contents tended to increase. In panel test, the flavor score tended to increase but the tenderness or total acceptability score tended to decrease until 30 months of age. In the muscle fiber characteristics, the ratio of white muscle fiber(IIW type) was the largest, and the ratio of intermediate muscle fiber(IIR type) was the smallest except for 6 or 24 months. The ratio of red muscle fiber(IR type) or IIR type tended to decrease, but the ratio of IIW tended to increase until 24 months of age. In the muscle fiber diameter, the IIW type had the largest diameter, but the IR type had the smallest diameter except the I8 or 24 months of age. The diameter of three muscle fiber types tended to increase until 30 months, and the IIW type showed faster increase. In the transmission electron micrographs, muscle fiber from longissimus muscle of 6 months did not show the full development and the A or I band was not fully observed. However, muscle fiber from longissimus muscle of 18 months showed thicker Z-line and the A or I band was fully observed. The longissimus muscle of 24 or 30 months showed the similar morphological pattern of muscle fiber as 18 months of growing age, but the muscle fiber seemed to be fully developed.

한우개량을 이해하기 위한 기본적 유전개념

김내수 한국종축개량협회 1997 種畜改良 Vol.19 No.1

위성/지상 ATM망 연동 및 서비스 제공방안 고찰

김내수,최동준,오덕길,Kim, Nae-Su,Choe, Dong-Jun,O, Deok-Gil 한국통신학회 1999 정보와 통신 Vol.16 No.9

DVB-S2 위성방송 전송규격 개정 동향

김내수,최은아,Kim, Nae-Su,Choe, Eun-A 한국위성정보통신학회 2003 위성통신과 우주산업 Vol.11 No.1