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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 52, Issue 6 - Dec 2010
Volume 52, Issue 5 - Oct 2010
Volume 52, Issue 4 - Aug 2010
Volume 52, Issue 3 - Jun 2010
Volume 52, Issue 2 - Apr 2010
Volume 52, Issue 1 - Feb 2010
Selecting the target year
Research on the Reformation of the Selection Index for Hanwoo Proven Bull
Kim, Hyo-Sun ; Hwang, Jeong-Mi ; Choi, Tae-Jeong ; Park, Byong-Ho ; Cho, Kwang-Hyun ; Park, Cheol-Jin ; Kim, Si-Dong ;
Journal of Animal Science and Technology, volume 52, issue 2, 2010, Pages 83~90
DOI : 10.5187/JAST.2010.52.2.083
Hanwoo proven bulls have been selected since 1987 and consequently contributed to farmers for the improvement of beef cattle in Korea. The demand for the quality beef production as well as higher production efficiency was erupted after early 2000 as relatively cheap imported beef released. Therefore the pressure on the reformation of selection index for Hanwoo proven bulls have been piled up to furnish with Hanwoo's competitive. A total of 734 progeny test data were analyzed to select traits and their weights in the selection index to meet the beef market requirement. Regression analysis with stepwise selection method was used to select proper trait and its weight for selection index. A series of computer simulation was carried out to compare the currently using selection index with the alternate two selection indices proposed in this study. New selection index using standardized breeding values of Loin eye Muscle Area (LMA), Backfat Thickness (BFT) and Marbling Score (MS) with weight ratio 1:-1:6 was proposed. Results showed higher performance in improving MS and BFT gain by 22% and 31% still holding 86%~89% of genetic gain achieved by current index in Carcass Weight (CW) and LMA when new selection index was fitted. Because, new index has little consideration for production cost, further research should be performed to build selection index including cost and income simultaneously.
Development of SNP Markers for Domestic Pork Traceability
Kim, Sang-Wook ; Li, Xiaoping ; Lee, Yun-Mi ; Kim, Jong-Joo ; Kim, Tae-Hun ; Choi, Bong-Hwan ; Kim, Kwan-Suk ;
Journal of Animal Science and Technology, volume 52, issue 2, 2010, Pages 91~96
DOI : 10.5187/JAST.2010.52.2.091
The purpose of the study was to develop an optimum SNP marker set to be utilized for domestic pork traceability. The study tested 51 SNP markers analyzed for origin of farm to be determined from genotypes of offspring and parents in pigs. With the simulation data through random mating population (PI), half sib mating population (
) and full sib mating population (
), probability of identical genotypes were analyzed as
, respectively. The 51 SNP markers also had 100% accuracy for parental determination. These results suggest that if the pig breeding stock is genotyped with the 51 SNP markers, the genotype information of individual offspring can be checked for farm origins by tracing parental sow and sire. Therefore, these SNP markers will be useful to trace the pork from production to consumption in pigs.
Genetic Evaluation of Thoroughbred Racehorses Using the Integrated Racing Records Collected from Different Racetracks
Cho, Kwang-Hyun ; Son, Sam-Kyu ; Cho, Byung-Wook ; Kim, Jong-Gyu ; Kong, Hong-Sik ; Lee, Hak-Kyo ; Park, Kyung-Do ;
Journal of Animal Science and Technology, volume 52, issue 2, 2010, Pages 97~102
DOI : 10.5187/JAST.2010.52.2.097
The objective of this study was to examine the suitability of genetic evaluation models using the integrated racing records collected from Gwacheon and Busan Gyeongnam racetracks. Results obtained are summarized as follows: In the short-distance races of 1,400 meters and less the records of finishing time at Gwacheon racetrack was superior, whereas, in the races of 1,800 meters and more it was superior in the records from Busan Gyeongnam racetrack. The effects of contemporary groups accounted for 42.7~70.2% of the total variation, and the effects of the individual race considering racing classes was the biggest in all racing distances. Heritabilities and repeatabilities for the finishing time were estimated in the range of 0.153-0.238 and 0.401-0.498, respectively. Correlation coefficients between the breeding values estimated from the integrated records and the breeding values estimated from records of Gwacheon and Busan-Gyeongnam were 0.907 and 0.803, and coefficients of rank correlations were 0.891 and 0.846, respectively. The correlation coefficients between sire's annual earning of the integrated records and Gwacheon and Busan Gyeongnam racetracks records were 0.943 and 0.886, and coefficients of rank correlations were 0.938 and 0.853, respectively. Also, the correlation coefficient of sire's annual earning between Gwacheon and Busan Gyeongnam racetracks was 0.742. The results of this analysis indicate that the genetic evaluation using the integrated racing records are reliable when the racing records from Busan Gyeongnam racetracks are stabilized and more data are accumulated.
Effects of Supplemental Medicinal Plants (Artemisia, Acanthopanax and Garlic) on Productive Performance of Sows and on Growth and Carcass Traits in Finishing Pigs
Jang, Hae-Dong ; Lee, Je-Hyun ; Hong, Seong-Min ; Jung, Ji-Hong ; Kim, In-Ho ;
Journal of Animal Science and Technology, volume 52, issue 2, 2010, Pages 103~110
DOI : 10.5187/JAST.2010.52.2.103
This study was conducted to determine the effect of supplemental medicinal plants (Artemisia, Acanthopanx and Garlic) on productive parameters in pigs. In experiment 1, a total of 90 multiparous sows were used in a 21-d performance study. The diets included: 1) CON (basal diet; Control), 2) BM1 (CON + 0.1% medicinal plants) and 3) BM2 (CON + 0.2% medicinal plants). Backfat thickness from farrowing to weaning was higher (P<0.05) in CON compared with sows fed treatments diets. The piglets weight gain was higher in the medicinal plants treatments (P<0.05). ADFI, nutrient digestibility and survivability were not affected by the experimental treatments. In experiment 2, a total of 60 finishing pigs (Landrace
average initial body weight) were used in a 56-d performance assay to determine the effects of supplemental medicinal plants (Artemisia, Acanthopanx and Garlic) on growth performance and carcass characteristics in finishing pigs. The dietary treatments included: 1) CON (basal diet ; Control), 2) BM1 (CON + 0.1% medicinal plants) and 3) BM2 (CON + 0.2% medicinal plants). For 4~8 weeks and overall period, ADG was higher (P<0.05) in the pigs fed medicinal plants. CON treatment was higher 24 pH loin and cooking loss than BM1 treatment (P<0.05). Water holding capacity and drip loss after 1day were affected by the dietary treatments (P<0.05). No numerical differences were observed in sensory evaluation, meat color, TBARS and loin area among three treatments. In conclusion, the results obtained from this feeding trial suggest that the medicinal plants mixture supplementation in diets for finishing pigs can improve ADG, water holding capacity, cooking loss and it improved backfat loss in sow and, litter weight gain.
The Effects of Different Feeding Levels on the Number of Fecal Lactic Acid-producing Bacteria and Fecal pH in Horses
Lee, Chong-Eon ; Kim, Nam-Young ; Park, Nam-Geon ; Oh, Woon-Young ; Cheong, Ha-Yeun ; Joa, Jae-Ho ;
Journal of Animal Science and Technology, volume 52, issue 2, 2010, Pages 111~116
DOI : 10.5187/JAST.2010.52.2.111
This study was conducted to determine the effects of different feeding levels on the number of fecal lactic acid-producing bacteria and fecal pH in horses. In Exp. 1, 6 female cross-bred horses (
, 5 year old) were fed 2% hay or 2% concentrates of BW for 30 d, and the number of fecal Lactobacilli and Streptococci was measured. For Exp. 2, 5 castrated Thoroughbred (
, 4 year old) and 5 female cross-bred horses (
, 5 year old) were allotted to high- or low-concentrates diets (5 levels) for 30 d in a
Latin square design, and the fecal pH was assessed. In Exp. 3, 3 castrated Thoroughbred (
, 4 year old) were fed high- or low-alfalfa hay diets (3 levels) for 30 d in a
Latin square design, and the fecal pH was measured. Feeding high-concentrates diets increased (P<0.05) the number of fecal lactic acid-producing bacteria (Lactobacilli and Streptococci) and decreased (P<0.01) the fecal pH. Feeding alfalfa hay with high-concentrates diet (2% alfalfa hay + 1% concentrates of BW) decreased (P<0.01) the fecal pH. These results showed that feeding high-concentrates diets increased lactic acid-producing bacteria in the large intestine and decreased the intestinal or fecal pH causing colic or laminitis, indicating that the proper fiber/concentrates (1:1) should be maintained in horses.
Evaluation of Microbially Ensiled Spent Mushroom (Pleurotus osteratus) Substrates (Bed-Type Cultivation) as a Roughage for Ruminants
Kim, Young-Il ; Seok, Jun-Sang ; Kwak, Wan-Sup ;
Journal of Animal Science and Technology, volume 52, issue 2, 2010, Pages 117~124
DOI : 10.5187/JAST.2010.52.2.117
An in situ ruminal disappearance trial and an in vivo sheep metabolism trial were conducted to evaluate the nutritional value of spent mushroom substrate (SMS, originated from Pleurotus osteratus bed-type cultivation). The raw SMS was ensiled (ESMS) for 30 days with 5% (w/w, DM basis) molasses, 0.5% (v/w) yeast (Saccharomyces cerevisiae) and 0.5% (v/w) lactic acid bacteria (Lactobacillus plantarum). Two ruminally cannulated Holsteins (average BW 620 kg) were used to evaluate in situ disappearance. Six sheeps (average BW 48 kg) were fed, in
Latin square design, rice straw alone (Control), 25% (ESMS-25) and 50% (ESMS-50) of rice straw were replaced with ensiled SMS. For an in situ trial, ruminal DM and neutral detergent fiber (NDF) disappearance of SMS were increased after ensiling (P<0.05). For a sheep trial, protein and fiber (NDF, acid detergent fiber, crude fiber) digestibilities were decreased (P<0.05), crude ash digestibility was increased (P<0.001), and nitrogen retention was not affected (P>0.05) as rice straw was replaced with ensiled SMS. Ruminating time was decreased by an average of 28% by feeding ensiled SMS (P<0.05). Ensiled SMS (Bed-type cultivation) had 76% of energy value of rice straw. Consequently, ensiled SMS (Bed-type cultivation, 100% cotton waste) could be used as a roughage source appropriate for maintenance type rations for ruminants.
Effects of Feeding Blended Essential Oils on Meat Quality Improvement for Branded Pork
Jang, Hae-Dong ; Hong, Seong-Min ; Jung, Ji-Hong ; Kim, In-Ho ;
Journal of Animal Science and Technology, volume 52, issue 2, 2010, Pages 125~130
DOI : 10.5187/JAST.2010.52.2.125
This study was conducted to investigate the effects of blended feeding essential oils on meat quality improvement for branded pork. A total of one-hundred pigs (
, average initial BW) were used for 10 weeks study. Dietary treatments included: 1) CON (basal diet), 2) NBE (basal diet + 75 ppm of blended essential oil), 3) NBA (basal diet + 0.3% Benzoic acid) and 4) BEB [basal diet + 75 ppm of blended essential oil (with 0.3% Benzoic acid)]. The marbling value was improved in NBE treatment compared to NC and PC treatments (P<0.05). Hardness was higher in NBA treatment than NC and PC treatments (P<0.05). The pH value was higher in BEB treatment than PC and NBE treatments (P<0.05). In fatty acid content of lean, total UFA/SFA was higher in NBA treatment than BEB treatment (P<0.05). In conclusion, the results of this study indicated that dietary supplementation with blended essential oils improve fatty acid content of meat.
Effect of Cordyceps ochraceostromat, Silkworm Cocoon, and Conjugated Linoleic Acid (CLA) on the Quality Characteristics of Pork Sausage Manufactured with Protein Recovered from Breast of Spent Laying Hen
Jin, Sang-Keun ; Kim, Il-Suk ; Kang, Suk-Nam ; Choi, Seung-Yun ; Hur, In-Chul ; Lee, Jung-Guen ; Yang, Han-Sul ;
Journal of Animal Science and Technology, volume 52, issue 2, 2010, Pages 131~140
DOI : 10.5187/JAST.2010.52.2.131
This study was conducted to investigate the effects of Cordyceps ochraceostromat, silkworm cocoon, and conjugated linoleic acid (CLA) on the quality and storage properties of pork sausage manufactured with protein recovered from breast of spent laying hen during 4 wks of storage at
. Pork sausages were prepared using 100% ham (control) and 40% recovered protein from breast of spent laying hen to replace pork (T1), and with added different sources to final concentrations of 0.1% Cordyceps ochraceostromat powder (T2), 0.1% silkworm cocoon powder (T3), 0.1% CLA (T4), 0.05% Cordyceps ochraceostromat + 0.05% silkworm cocoon (T5), 0.05% Cordyceps ochraceostromat + 0.05% CLA (T6), and 0.05% silkworm cocoon + 0.05% CLA (T7). The treatments T5 and T7 had higher (p<0.05) protein content than control, but control had lower fat content than other samples during 4 wks of storage at
. Lightness was significantly lower in the treatment samples than control. However, there was no significant difference in water holding capacity between the sausage samples, whereas, cohesiveness and chewiness were significantly higher (p<0.05) in the control than other treatments. All sausage samples showed a significant increase in volatile basic nitrogen (VBN) and total plate counts with extending storage time (p<0.05), and VBN values of treatments were lower than the control. However, the treatment samples showed a significant decrease (p<0.05) in thiobarbituric acid reactive substances over the increasing storage time. Therefore, our results suggested that the 40% recovered protein to replace pork and with added different sources decreased lipid oxidation and protein denaturation of pork sausages, thereby enhancing self-life, compared to normal pork sausage (control).
A Study on the Yogurt Manufacture Suitability and Antimicrobial Activity of Lactobacillus plantarum LHB55 Isolated from Kimchi
Lee, Seung-Gyu ; Lee, Yeon-Jung ; Kim, Min-Kyung ; Han, Ki-Sung ; Jeong, Seok-Geun ; Oh, Mi-Hwa ; Jang, Ae-Ra ; Kim, Dong-Hun ; Bae, In-Hyu ; Ham, Jun-Sang ;
Journal of Animal Science and Technology, volume 52, issue 2, 2010, Pages 141~148
DOI : 10.5187/JAST.2010.52.2.141
The aim of this study was to develop a new starter for fermented milk. The approach started with 103 acid-producing isolates from Kimchi, a type of spiced, fermented cabbage and then PCR screening was used to identify 72 Lactobacillus strains. The ability to inhibit the growth of food-borne human pathogens (Escherichia coli, Salmonella enteritidis, Staphylococcus aureus) of these strains were measured, using the paper disk method. Among them, one bacterium (LHB55) that showed a strong antibacterial activity against food-borne human pathogens was identified and further characterized, using 16S rDNA sequencing and API 50CHL system. Because this isolate was identified as L. plantarum, it was named as L. plantarum LHB55. The yogurt produced using commercial LAB with L. plantarum LHB55 did not display properties that are microbially or physico-chemically different from the control group, which suggests that L. plantarum LHB55 can be used as a useful starter for yogurt containing high antibacterial activity. We think that identifying effective starter strains enabling further development of fermented milk that can deliver better health benefits such as antimicrobial properties is of high significance, and thus our effort in this type of approach will continue.
Effects of Whole Grain Barley Cracked Feed on the Eating Behavior of Hanwoo Steers During Finish Fattening Period
Lee, Sang-Moo ; Choi, Yu-Rak ;
Journal of Animal Science and Technology, volume 52, issue 2, 2010, Pages 149~156
DOI : 10.5187/JAST.2010.52.2.149
This study was carried out to investigate the effect of dietary supplementation of whole grain barley cracked feed on eating behaviors of Hanwoo steers during finish fattening period. Thirty Hanwoo steers (28 months old) were assigned to five dietary treatments: control (C: normal concentrate as a basal diet), and four feeding groups [T1: 10% addition of whole grain barley cracked (WGBC) feed, T2: 20% addition of WGBC, T3: 30% addition of WGBC and T4: 40% WGBC during the finish fattening period, respectively]. The results of eating behaviors for 48 hours are summarized as follows: Total intake (roughage + concentrate) was higher in the order of T4 > T1 > C > T3 > T2 (P<0.05). Eating time was higher in the order of T4 > T3 > C > T1 > T2 (P<0.01). Ruminating time was higher in the order of T4 > T1 > C > T3 > T2 (P<0.05). But resting time was higher in the order of T2 > T1 > C > T3 > T4. The chewing time including eating and ruminating time was higher in the order of T4 > T3 > C > T1 > T2 (P<0.01). Number of bolus, number of total chews, number of chews/bolus and feed value index were highest in T4 (P<0.05). Ruminating time per bolus was highest in C, and T3 was the lowest (P<0.05) as compared to others. Number of bolus per minute was highest in T3, and C is the lowest (P<0.05). Eating rate and chewing efficiency were highest in T2 (P<0.01, 0.05), but ruminating efficiency was higher in T1 than others. The group behavior was higher in the order of resting(78.5%) > ruminating(11.4%) > eating(10.1%). The stand resting of group behavior was higher in the order of T3 > C > T2 > T1 > T4.
The Influence of Carcass Traits on Carcass Price in Mature Hanwoo Cow
Kim, Dae-Jung ; Lee, Chang-Woo ; Lee, Chae-Young ; Kim, Jong-Bok ;
Journal of Animal Science and Technology, volume 52, issue 2, 2010, Pages 157~164
DOI : 10.5187/JAST.2010.52.2.157
We investigated the influence of carcass traits on carcass price for Hanwoo cow using multiple regression and path analyses. Data for carcass traits and price were collected on mature Hanwoo cow raised in private farms in Kangwon province that were slaughtered in 2008. A total of 96 animals with the average slaughter age of 51 months were used in the current study. Of the carcass traits studied, marbling score (MAR), dressing percentage (DP), and eye-muscle area (EMA) showed moderate and positive correlations with auction price (AP), while correlation coefficients of meat yield index (MINDEX) with AP were low or even negligible. In multiple regression analyses of AP and carcass price (CP) on cold carcass weight (CWT), back fat thickness (BFT), EMA, MAR, and DP, estimates of
were 69.86 and 85.43%, respectively. Partial regression coefficients for CWT, BFT, EMA, MAR and DP were -0.028, -0.106, 0.107, 0.814, and 0.075 in the equation of AP and 0.561, -0.060, 0.083, 0.590, and 0.051 in the equation of CP. In path analyses, MAR's total contribution on the variation of AP was largest (0.667), and the total contributions of MAR and CWT on the variation of CP were 0.403 and 0.397. The current study suggested that marbling was the most influential trait on the variation of auction price, and marbling and cold carcass weight were critical traits on the variation of carcass price.