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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Animal Science and Technology
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Journal DOI :
Korean Society of Animal Science and Technology
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Volume & Issues
Volume 50, Issue 6 - Dec 2008
Volume 50, Issue 5 - Oct 2008
Volume 50, Issue 4 - Aug 2008
Volume 50, Issue 3 - Jun 2008
Volume 50, Issue 2 - Apr 2008
Volume 50, Issue 1 - Feb 2008
Selecting the target year
Relationship of Somatic Cell Score and Udder Type Traits of Holstein Cattle
Choi, Tae Jeong ; Seo, Kang Seok ; Kim, Sidong ; Park, Byung Ho ; Choi, Je Kwan ; Yoon, Ho Paek ; Na, Seung Hwan ; Son, Sam Kyu ; Kwon, Oh Sub ; Cho, Kwang Hyun ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 285~292
DOI : 10.5187/JAST.2008.50.3.285
Data were taken from the dairy herd improve- ment program from the year 2000, composed of 10,929 first lactation cows consisting of 290,144 test-day records and 37,723 udder type records. The objective of the study was to estimate genetic and phenotypic correlation between fore udder attachment, rear udder height, rear udder width, udder cleft, udder depth, and somatic cell score (SCS) and to calculate heritability of udder depth, front teat length and SCS in Holstein cattle in Korea. The variance component estima- tion using test day model was determined by a derivative-free algorithm-restricted maximum likeli- hood(DF-REML) analysis method. Generally phenotypic correlations were very low between udder traits and lactation SCS which varied from －0.03 to －0.06. Heritability of all type traits and SCS was smaller than 0.12. The results of this study would be applicable to SCS using linear genetic evaluation for future studies
Expression Profiles of Triacylglycerol Biosynthesis Genes on Fattening Stages in Hanwoo
Kim, Nam-Kuk ; Kim, Sung-Kon ; Heo, Kang-Nyeong ; Yoon, Duhak ; Lee, Chang-Soo ; Im, Seok-Ki ; Park, Eung-Woo ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 293~300
DOI : 10.5187/JAST.2008.50.3.293
Muscle fat content including intramuscular fat content(IMF) is the most important parameter in meat quality of cattle. Triacylglycerol is the major component of fat and is found in adipocyte and skeletal muscle. In present study, we carried out the determined of triacylglycerol contents and mRNA expression patterns of genes related with triacylglycerol biosynthesis such as ACSS2, GPAT, MGAT and DGAT in Hanwoo longissimus muscle using the real-time PCR. The triacylglycerol contents were continuously increased during the fattening stages. Interestingly, the contents of triacylglycerol were 7.4 fold higher(0.34 vs. 2.51, P<0.01) in 27 months old group than 12 months old group. The mRNA levels of ACSS2, GPAT and DGAT genes were also increased during fattening stages, whereas that of MGAT gene did not show difference among the stages. Thus, these results suggested that increasing of the triacylglycerol contents in longissimus muscle during fattening stages may be related with increased expressions of triacylglycerol biosynthesis genes(ACSS2, GPAT and DGAT). These results will be helpful to understand the mechanism of muscle fat deposition in skeletal muscle.
Genetic Polymorphisms of MYL2 and ADCYAP1R1 Genes and Their Association with Carcass Traits in Finished Pigs
Han, ang-Hyun ; Shin, Kwang-Yun ; Lee, Sung-Soo ; Ko, Moon-Suck ; Seong, Pil-Nam ; Kwon, Ki-Baek ; Cho, In-Cheol ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 301~308
DOI : 10.5187/JAST.2008.50.3.301
DNA variation of MYL2 intron 5 A345G and ADCYAP1R1 intron 2 A337G were investigated for carcass trait association in finished pigs. Three genotypes(two homozygotes and their heterozygote) were found at 10.6% AA, 45.6% AG and 43.8% GG in MYL2 and 60.5% AA, 34.6% AG, and 22.2% GG for ADCYAP1R1. In finished pig population, individuals containing genotype G- of MYL2 had significantly heavier carcass weight by more than 2.4 kg and thicker backfat thickness by more than 1.3 mm than those of AA homozygous pigs(p<0.05). No significant difference was found in other traits tested in this study such as marbling score, meat color, texture, moisture and separation score(p>0.05). The ADCYAP1R1 intron 2 377GG homozygotes showed coarse texture, i.e., meat quality was inferior than those of AG and AA genotypes, and the moisture level of homozygote AA was higher than those of AG and GG genotypes(p<0.05). The other carcass traits were not significantly associated with ADCYAP1R1 genotypes(p>0.05). The genetic polymorphism of MYL2 and ADCYAP1R1 genes affected the carcass traits in finished pig population. Further studies to explain the association between genetic variations and their phenotypic effects including economic traits in pigs are required including critical mutation in both genes through molecular approaches.
Effects of the Condition of Racetrack on Racing Time in Thoroughbred Racehorses
Cho, Kwang Hyun ; Son, Sam Kyu ; Cho, Byung Wook ; Kim, Jong Gyu ; Lee, Hak Kyo ; Park, Kyung Do ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 309~314
DOI : 10.5187/JAST.2008.50.3.309
The objective of this study was to estimate effects of the condition of racetrack on racing time in Thoroughbred racehorses, using 148,865 racing records for 8,189 heads that collected from KRA(Korea Racing Association). The results obtained were as follows. Based on moisture contents, the condition of racetrack was classified into Heavy, Good, Soft, Yielding and Sloppy. The condition of racetrack for last 12 years was 40.7%, 34.4%, 14.4%, 8.7% and 1.8% for Heavy, Good, Soft, Yielding and Sloppy, respectively. The frequency of heavy condition for racetrack was the highest and those of Yielding and Sloppy were relatively low. On the other hand, the frequency of heavy condition for racetrack was increased in spring and winter, whereas frequency of sloppy racetrack was increased in summer. The frequency of good condition was the highest in autumn. The regression coefficients of moisture contents in racetrack for racing time by racing distance ranged from －0.068~－0.162 seconds and the racing time was faster in sloppy condition than other track conditions. The time differences between Heavy and Sloppy ranged from －1.47~－3.41 seconds by distance.
Effects of Retinoic Acid on Differentiation of Pig Preadipocytes
Kim, Hye-Rim ; Chung, Chung Soo ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 315~320
DOI : 10.5187/JAST.2008.50.3.315
Effects of Dietary Biotite Powder on Growth Performance, Changes in Blood Immune and Stress Related Parameters, and Fecal Malodor Gas Emission in Growing Pigs
Jang, Hae-Dong ; Kim, Jin-Don ; Hong, Jong-Wk ; Yoo, Jong-Sang ; Kim, Hyo-Jin ; Shin, Seung-Oh ; Hwang, Yan ; Zhou, Tian-Xiang ; Chen, Ying-Jie ; Cho, Jin-Ho ; Jeong, Yeon-Kwon ; Kim, In-Ho ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 321~330
DOI : 10.5187/JAST.2008.50.3.321
Effect of Dietary Phytase on Growth Performance, Meat Quality, Nutrient Digestibility and Phosphorus Utilization in Broilers
Jang, Hea-Dong ; Yoo, Jong-Sang ; Kim, Hyo-Jin ; Shin, Seung-Oh ; Hwang, Yan ; Zhou, Tian-Xiang ; Chen, Ying-Jie ; Cho, Jin-Ho ; Kim, In-Ho ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 331~342
DOI : 10.5187/JAST.2008.50.3.331
Effects of Restricted Feeding during Growing Period on Growth and Endocrine Profile in Layers
Kang, Hwan Ku ; Cho, Jae Hoon ; Kim, Ji Hyuk ; Kang, Geun Ho ; Yu, Dong Jo ; Na, Jae Cheon ; Kim, Dong Wook ; Lee, Sang Jin ; Kim, In Shik ; Kim, Sang Ho ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 343~354
DOI : 10.5187/JAST.2008.50.3.343
The objective of this study was to investigate the effect of restricted feeding to pullet on growth and endocrine profile in layers(Isa brown). One thousand eighty brown-layer chicks were divided into three treatments; conventional feeding(ad libitum) and two restricted feedings(80% of conventional diet) for 70 weeks. One of restricted feeding started from seven to seventeen weeks of age, and the other started from twelve to seventeen weeks of age. Diets were formulated by NRC(1994) recommendation. Body weight and feed intake were measured every two weeks, and body composition and organ weight analyzed every week in rearing period and every eight weeks in laying period. Blood was collected at weighing body weight and was analyzed for the concentration of insulin-like growth factor-Ⅰand estradiol. Body weight and feed intake decreased as restriction of feeding begins comparing to ad libitum group(P<0.05), but reached to similar body weight and feed intake at 20 wk of age regardless of restriction. There were no significant differences in development of digestive tract and attached organs among the treatment groups. During rearing period, however, they were slightly higher in restricted group which was low in body weight. In terms of body composition, fat contents of restricted group were significantly lower(P<0.05) than that of ad libitum group around 1,000 grams of body weight. High concentration of IGF-Ⅰwas observed.
Effects of Different Sources of Dietary Chromium and Copper on Growth Performances, Nutrients Digestibility, Fecal Cr, Cu and Zn Excretion in Growing Pigs
Park, Jeoung-Keum ; Kim, Jin-Woong ; Yoo, Young-Beom ; Lee, Jun-Yeop ; Ohh, Sang-Jip ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 355~362
DOI : 10.5187/JAST.2008.50.3.355
This study was carried out to evaluate effects of either organic or inorganic sources of both chromium and copper on growth performances, nutrients digestibility and fecal Cr, Cu, and Zn excretion in growing pigs. A total of 36 growing pigs((Landrace×Yorkshire)×Duroc, weighing 61.2kg in average) were allotted to 4 treatments with 3 replicates and 3 pigs per replicate. Four treatments were designated by supplemental sources of both chromium and copper as follows: ①200ppb Cr as Cr-methionine chelate(CrMet) and 200ppm Cuas copper methionine chelate(CuMet), ②200ppb Cr as CrMet and 200ppm Cu as copper sulfate(CuSO4), ③200ppb Cr as chromium chloride(CrCl3) and 200ppm Cu as CuMet, ④200ppb Cr as CrCl3 and 200ppm Cu as CuSO4. Growth performance was highest(p<0.05) in CrMet and CuMet supplemented diet treatment. Nutrients digestibility of diets was lowest(p<0.05) in CrMet and CuSO4 supplemented diet treatment, and highest(p<0.05) in CrMet and CuMet supplemented diet treatment. Fecal copper, zinc and chromium excretion was highest(p<0.05) in CrCl3 and CuSO4 supplementation treatment and lowest(p<0.05) in CrMet and CuMet supplementation treatment. This study showed a relatively high degree of utilization of Cr and Cu as well as Zn by supplementation of CrMet and CuMet compared with those of the inorganic sources.
Effects of Total Mixed Rations on Growth Performance and Carcass Charcteristics of Hanwoo Steers
Cho, Young Moo ; Kwon, Eung Gi ; Chang, Sun Sik ; Kim, Tae Il ; Park, Byung Ki ; Kang, Su Won ; Paek, Bong Hyun ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 363~372
DOI : 10.5187/JAST.2008.50.3.363
To investigate the effects of total mixed ration(TMR) on growth performance and carcass characteristics of Hanwoo steers, sixty steers were randomly assigned to one of four treatment groups; separate feeding of concentrate and rice straw(control), wet TMR(TMRⅠ), dry TMR with 20%(TMRⅡ) and 40%(TMRⅢ) barley bran from 6 to 28 month of age. In growth performance, average daily gains of TMRⅡ group was the highest(0.70kg/day) but significant differences between treatments were not found(p>0.05). Average feed required for kg body weight gain of control group was 11.63kg. Those of TMRⅠ through TMRⅢ were 9.29, 10.46 and 10.71kg, respectively. Dressing percentage and retailed cut percentage were 59% and 63%, without any significant differences between treatments(p>0.05). There were no significant differences in rib-eye area, back fat thickness, meat color and fat color (p>0.05). Average marbling score was higher(p<0.05) in TMRⅠ than in control group.
Effect of Feed Withdrawal Time on Quality of Broiler Meat
Choi, Jung Suck ; Park, Ki Soo ; Lee, Jae Ik ; Auh, Joong Hyuck ; Choi, Yang Il ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 373~380
DOI : 10.5187/JAST.2008.50.3.373
This study was undertaken to investigate the effects of feed withdrawal time(FWT) before transport in farm(<2 hrs, 2~4 hrs, 4~6 hrs) and total feed withdrawal time(TFWT) before slaughter(<8 hrs, 8~12 hrs, >12 hrs) on carcass defects, grades and meat quality of broilers. FWT of 2~4 hrs before transport in the farm showed lower incidences of dead-on-arrival chicks(p<0.05) and bruising chicks, and a little higher incidences of 1st or 2nd carcass grade compared to shorter than 2 hrs or 4~6 hrs of FWT in the farm. In the meat quality of breast meat, FWT of 2~4 hrs in the farm tended to show higher pH and water holding capacity(WHC), and lower drip loss, cooking loss and shear force values compared to shorter than 2 hrs or 4~6 hrs of FWT in the farm. In the total microbial counts of breast meat during 7 days of cooler storage, FWT of 2~4 hrs in the farm showed significantly lower value than shorter than 2 hrs of FWT in the farm. In the carcass defects and grades by TFWT before slaughter, TFWT shorter than 8hrs showed lower(p<0.05) incidences of dead-on-arrival chicks and bruising chicks, and higher(p<0.05) incidences of 1st carcass grade than TFWT longer than 12 hrs before slaughter. In the meat quality of broiler breast meat, TFWT longer than 12hrs before slaughter showed lower(p<0.05) pH and WHC values, and a little higher drip loss, cooking loss and shear force values compared to TFWT shorter than 8 hrs or 8~12 hrs before slaughter. In the total microbial counts of broiler breast meat during 7 days of cooler storage, TFWT longer than 12 hrs before slaughter tended to show higher value than TFWT shorter than 8 hrs or 8~12 hrs before slaughter. As a result, 2~4 hrs of feed withdrawal time before transport in the farm and total feed withdrawal time shorter than 8hrs or 8~12hrs before slaughter could be recommended for the production of high quality broiler meat.
Effects of Molasses Addition on the Feeding Value of Socheongryongtang(Herbal Medicine) Meal Silage
Moon, Kye Bong ; Cho, Sung Kyung ; Park, Duk Sub ; Kim, Sung Bok ; Lee, Bong Duk ; Jo, Cheorun ; Lim, Jae Sam ; Lee, Soo Kee ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 381~390
DOI : 10.5187/JAST.2008.50.3.381
Two experiments were conducted to investigate effects of molasses addition to silage materials in ensiling Socheongryongtang meal on the nutritive quality of silage, palatability and various ruminal parameters in Korean native goats. In Experiment 1, Socheongryongtang meal silage was produced by the addition of 0, 0.5, or 1.0% molasses and stored for 40 days at room temperature. There were three replicates per treatment. Lactic acid contents of Socheongryongtang meal silage containing molasses(0.5 and 1.0%) were significantly(p<0.05) higher than that of the control(0%). However, the pH and butyric acid contents of Socheongryongtang meal silage containing molasses(0.5 and 1.0%) were lower than those of the control(0%). In addition, molasses(0.5 and 1.0%) increased the number of lactobacillus, but decreased the number of fungi in Socheongryongtang meal silage. In vitro dry matter disappearance tended to increase by molasses addition. In Experiment 2, three 1.5-yr-old Korean native female goats were employed in cross-over design to measure the palatability and various ruminal parameters of Socheongryongtang meal silage. Feed intake of Socheongryongtang meal silage containing molasses(0.5 and 1.0%) for 30 min significantly higher than that of control(0%). Silmilar trend was found when the feed intake was measured for 6 hr. In various ruminal parameters, molasses addition to silage materials increased propionic acid(P) and total volatile fatty acid contents, but decreased pH, acetic acid (A), and butyric acid. The A/P ratio was the lowest in 1.0% molasses treatment group. It is concluded that molasses addition in ensiling Socheongryongtang meal could enhance its nutritional quality and lengthen storage period. Also the palatability of silage was improved by the addition of molasses.
Characteristic of Odorous Compounds Emitted from Livestock Waste Treatment Facilities Combined Methane Fermentation and Composting Process
Ko, Han Jong ; Kim, Ki Youn ; Kim, Hyeon Tae ; Ko, Moon Seok ; Higuchi, Takasi ; Umeda, Mikio ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 391~400
DOI : 10.5187/JAST.2008.50.3.391
Odor management is significantly concerned with sustainable livestock production because odor nuisance is a primary cause for complaint to neighbors. This study was conducted to measure the concentration of odorous compounds, odor intensity, and odor offensiveness at unit process in animal waste treatment facility combined composting and methane fermentation process by an instrumental analysis and direct olfactory method. Ammonia, sulfur-containing compounds, and volatile fatty acid were analyzed at each process units and boundary area in summer and winter, respectively. Higher concentration of odorants occurred in the summer than in the winter due to high ambient temperature. The maximum concentration of odorants was detected in composting pile when mixed manure was being turned followed by inlet, curing, outlet, and screen & packing process. Highest concentration of detected odorous compounds was ammonia ranging from 3.4 to 224.7 ppm. Among the sulfur-containing compounds measured, hydrogen sulfide was a maximum level of 2.3 ppm and most of them exceeded reported odor detection thresholds. Acetic acid was the largest proportion of VFA generated, reaching a maximum of 51 to 89%, followed by propionic and butyric acid at 1.9 to 35% and 1.8 to 15%, respectively. Malodor assessment by a human panel appeared a similar tendency in instrumental analysis data. Odor quotient for predicting major odor-causing compounds was calculated by dividing concentrations measured in process units by odor detection thresholds. In the composting process, hydrogen sulfide, ammonia, dimethyl sulfide, and methyl mercaptan were deeply associated with odor-causing compounds, while the major malodor compounds in the inlet process were methyl mercaptan, hydrogen sulfide, and butyric acid.
Characteristics of Estrus-related Vocalizations of Sows after Artificial Insemination
Rhim, Shin-Jae ; Kim, Min-Jin ; Lee, Ju-Young ; Kim, Na Ra ; Kang, Jeong-Hoon ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 401~406
DOI : 10.5187/JAST.2008.50.3.401
This study was conducted to clarify the characteristics of estrus-related vocalization of sows after artificial insemination. Vocalization of sows in artificial insemination day, and 3 days and 50 days after artificial insemination, were recorded 3 hours per day from September 2006 to March 2007 using the MD Recorder(Marantz PMD-650) and microphone(RF Condesner MIC, MKH 416P48). The shapes of spectrum and spectrogram of vocalization were different in each period after artificial insemination. There were significant differences in frequency and intensity, but not in duration of vocalization. The fact that signal may give a reliable indication of the signaller's needs has suggested that in some circumstances they can provide information on animal welfare.
Effects of Calcium Chloride Injection on the Induction of Antlerogenesis by Breed in Female Deer
Kim, Sang Woo ; Lee, Seung Soo ; Choi, Sun Ho ; Sang, Byung Don ; Kim, Young Geun ; Sang, Byong Chan ; Seo, Kil Woong ; Moon, Sang Ho ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 407~416
DOI : 10.5187/JAST.2008.50.3.407
Effect of the Water Soluble Extracts from Velvet Antler on Lipid Metabolism and Blood Components in Rats
Cui, Xang Soon ; Kim, Hye In ; Cho, Seong Koo ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 417~428
DOI : 10.5187/JAST.2008.50.3.417
An experiment was conducted with 80 male rats for 4 weeks to investigate the effect of water soluble extracts(WSE) from different sections of farmed Elk(Cervus elaphus) antler on lipid metabolism and hematology. Antlers were divided into four sections of tip, upper, middle and base. Water soluble extract(35g/60ml) was prepared from each section of antler, and was administered orally to male Sprague- Dawley rats(10ml/kg body weight) once a day. Administration of WSE from upper, middle and base sections of antler decreased(P<0.0027) AST values at 3 weeks of feeding, however AST value was decreased(P< 0.0136) in the WSE of base section compared to that of control at 4 weeks of feeding. Administration of antler WSE for 4 weeks decreased total cholesterol in visceral fat(P<0.0035) and liver(P<0.0003) at 4 weeks of feeding compared to those of control. Feeding antler WSE for 4 weeks increased the compositions of C14:0(P<0.0037), C16:1(P<0.0061), C18:1(P<0.0066), C18:2(P< 0.0069) and C18:3(P<0.0035) in the visceral fat compared with that of control.
Isolation of a Bacillus licheniformis DK42 Producing Cellulase and Xylanase, and Properties of the Enzymes
Kim, Min Jeong ; Lim, Soo Jin ; Kang, Dae-Kyung ;
Journal of Animal Science and Technology, volume 50, issue 3, 2008, Pages 429~436
DOI : 10.5187/JAST.2008.50.3.429
A bacterium producing cold-active cellulase and xylanase was isolated from pig feces. The isolate, DK42 strain, was found to be the Gram-positive, non-motile, catalase-positive, and spore-forming stain. Under an electron microscope, the cells were observed to be rod-shaped. The isolate was identified as Bacillus licheniformis DK42 on the basis of morphological and biochemical properties as well as 16S rRNA gene sequences. The characterization of crude cellulase and xylanase from B. licheniformis DK42 was investigated. Cellulase exhibited an optimum temperature and pH at 45℃ and 6.0, whereas xylanase exhibited an optimum temperature and pH at 55℃ and 6.0. Especially cellulase maintained approx. 50% of its maximum activity even at 10℃, indicating that it is cold-active. Both cellulase and xylanase were stable after 2hr at 35℃, whereas they lost their activities after 30min at 65℃.