• Journal of Animal Science and Technology
• /
• v.46 no.2
• /
• pp.165-172
• /
• 2004

This study was conducted to investigate changes in physico-chemical characteristics of Hanwoo carcass according to different castration and slaughtering ages. Total 75 Hanwoo calves(average 4 months old) were randomly assigned to Control(bulIs). Treatment I. Il , III. or IV(castrated on 4. 9. 12. and 16 months of age, respectively) and slaughtered at 7. 9. 12, 16, and 28 months of age. Moisture contents in M. Longissimus dorsi of both Hanwoo bulls and steers were decreased as the slaughtering age increased. Moisture contents in all steer groups were significantly(P <0.05) lower(average 68.63%) than that in bulls(72.18%) at 28 months of age. Crude fat contents tended to increase as the slaughtering age increased. Crude fat contents in Treatment III(castrated at 12 months of age) at 28 months of age were 10.24% which was the highest among all steer groups. Crude protein contents in M. Longissimus dorsi of Hanwoo bulls were around 23% regardless of slaughtering age. Water holding capacity(WHC) of both bulls and steers tended to increase as the animals aged. Steers showed rapid increase in WHC after 16 months of age and showed higher(78.39%)) WHC than bulls(70.00%) at 28 months of age. Palmitic acid(CI8: 0) contents in Hanwoo bulls were increased as the slaughtering age increased(20.92 \longrightarrow 24.22%) whereas stearic acid(CI8: 0) contents were decreased(I8.l5 \longrightarrow11.32%). Oleic acid(CI8: I). a major unsaturated fatty acid. significantly(P <0.05) increased(25.59 \longrightarrow 37.90%) when slaughtering age of Hanwoo increased. Changes in fatty acid composition in Hanwoo steers were similar to those in bulls except oleic acid contents were higher and stearic acid contents were lower than bulls at 28 months of age.

• Journal of agriculture & life science
• /
• v.53 no.4
• /
• pp.55-59
• /
• 2019

Hanwoo has improved the quality of carcass traits. Especially, the higher the grade, the better the texture and taste of Hanwoo. One of the many factors that determine consumer preferences in food is the flavor. The flavor of food is expressed through heat treatment, and fat, carbohydrate and water-soluble compound are important ingredients for flavor. Therefore, The purpose of this study was to investigate the characteristics of fatty acids and carcass traits of 373 Hanwoos. The oleic acid (C18:1) and linolenic acid (C18:3) contents were 48.08% and 0.11%, respectively, while the carcass weight, Eye muscle area, back fat thickness and marbling score of the carcass trait were 383.73 kg, 83.88 ㎠, 10.91 mm, 3.89, respectively. The heritability of oleic acid was estimated to be 0.726, and the phenotypic correlation between eye muscle area and marbling score was estimated to be 0.105 and 0.141, respectively. The phenotype of the marbling score and eye muscle area were positively correlated with Oleic acid. Therefore, the improvement of these two traits seems to affect the increase of unsaturated fatty acid content.

• Journal of the Korean Data and Information Science Society
• /
• v.22 no.6
• /
• pp.1145-1152
• /
• 2011

This study was conducted to estimate genetic effects on economically important traits for genetic improvement in Hanwoo by using the real-time ultrasound measurements for longissimus dorsi muscle area (LMA), backfat thickness (BFT), and marbling score (Marb). The phenotypic data were obtained from 1,648 pedigreed cows, and general linear models were applied to test the effects of age, region, and body condition socre. The cows between 50 and 60 months of age had the greatest scores for LMA and BFT, and Marb (P<0.05). The cows in region C had the greatest scores for body condition socre, LMA and BFT, while in region J Marb was the lowest (P<0.05). There was positive relation with LMA, BFT, and Marb according to increase body condition socre. Heritabilities for LMA, BFT, and Marb were estimated as 0.136, 0.351, and 0.236, respectively. These results would provide primary information for the efficient implementation of genetic improvement schemes in Hanwoo.

• Food Science of Animal Resources
• /
• v.32 no.6
• /
• pp.842-848
• /
• 2012

This study was performed to investigate the physicochemical properties and tenderness of Hanwoo loin and round cuts, as affected by various raising periods and marbling scores. Five loin and round cuts with various marbling scores (5-9) from Hanwoo at various raising periods (27, 33, 30 mon) were collected. pH, Hunter color values (L, a, b), chemical composition, cooking loss, vacuum purge, and Warner-Bratzler shear values were evaluated according to two-way analysis of variance. No differences in pH values of Hanwoo loin were observed by raising period and marbling scores (p>0.05), but those of Hanwoo round at 27 mon was the lowest. Increased Hunter color values were observed with the increased marbling score and those at 27 and 30 mon were lower than 33 mon. Redness (a) and yellowness (b) of Hanwoo round cuts with the raising period of 27 mon were higher than those at 30 and 33 mon. The raising period of 27 mon showed higher water holding capacity than those of 30 and 33 mon, regardless of Hanwoo cut. Increased shear values (kgf) of Hanwoo round cuts were observed with increasing raising period (p<0.05). Increased marbling score decreased shear values in loin cuts, but no differences were observed in the round cuts. Based on these results, the parameters measured varied with meat cut, and raising period affected round pH, color, chemical composition, vacuum purge, and shear values. Marbling score affected color, chemical composition, water binding capacity, and shear values in loin cuts (p<0.05), but didn't affect any parameters in round cuts (p>0.05).

• Journal of Animal Science and Technology
• /
• v.49 no.6
• /
• pp.801-818
• /
• 2007

This study was carried out to determine the effects of processing methods of barley as a proper source of grain in diets of Hanwoo on fermentation pattern in the rumen fluid and digestibility of the diets, the growth performance and carcass characteristics of Hanwoo. The degree of ruminal pH change in the cows fed diets of the Corn(corn basis) and GDRB(ground and dry-rolled barley) tended to be greater than those in the cows fed other two diets (ground barley, GB and dry-rolled barley, DRB). The diet of GDRB showed the lowest ruminal pH(5.5), indicating the rapid degradation of the diet in the rumen. Although ammonia concentration was not affected by diet, the GR and DBR diets maintained the low concentrations of ruminal ammonia compared with other two treatments. And the effects of feeding processed barley grain on body weight gain and meat quality of Hanwoo steers were as follows. Steers fed DRB diet had the highest body weight, 683.0kg at 28 months old, while those fed the GDRB showed the lowest body weight, 653.3kg. The average daily gain(ADG) was similar between the steers fed Corn and GR throughout the whole period, but the GDRB showed the lowest ADG. The steers fed the DRB showed the significant increase in ADG(0.89kg/d from 19 to 23 months old and 0.43kg/d from 24 to 28 months old) compared with those fed other diets. Feeding diets containing corn and/or barley did not influence live body weight, cold carcass weight, carcass yield, back-fat thickness and carcass grade of Hanwoo steers.

• Journal of Animal Science and Technology
• /
• v.48 no.6
• /
• pp.759-766
• /
• 2006

This study was conducted to investigate the genetic correlations among the traits used to select young bulls and proven bulls in Hanwoo Performance and Progeny Test Program in Korea. For the estimation of heritabilities and correlations among the growth traits of bulls and carcass traits of progeny steers, 2,532 records of performance tested bull calves and 1,819 records of progeny tested steers were collected from Livestock Improvement Main Center (LIMC), National Agricultural Cooperative Federation (NACF). Fixed effects of mixed model for each traits were selected by using stepwise regression analysis and prior values of variance components were estimated by MTDFREML. The prior values of variance components were estimated with pairwise 2 traits model followed by single trait analysis. The estimated heritability of backfat thickness(BF), dressing percentage(DP), loin-eye muscle area(LMA), marbling score(MS) and weight at 12 months(WT12) was 0.51, 0.32, 0.27, 0.33, 0.50 and 0.26, respectively. Genetic correlation of WT12 of bull calves with backfat thickness, carcass weight and loin-eye muscle area of steers was positive correlation as 0.05, 0.35 and 0.21, respectively. However genetic correlation of WT12 with DP and MS showed negative correlation as 󰠏0.09 and 󰠏0.27, respectively and these negative genetic correlations implies that bulls that may be superior in carcass traits can be lost at the first step of selection and current selection method should be modified to solve this problem.

• Journal of Animal Science and Technology
• /
• v.55 no.5
• /
• pp.351-358
• /
• 2013

This study was conducted to estimate the correlation structure between body size traits, carcass traits, and primal cuts in Hanwoo steers. Hanwoo progeny test data (body weight and body measurements) were collected from 2008 to 2010 from a total of 882 steers at the Hanwoo Improvement Main Center (NACF). Carcass traits considered were cold carcass weight, eye muscle area, backfat thickness, and marbling scores evaluated at the time of carcass grading. Correlation analyses were performed with observed scales of the traits and with residuals considering fixed environmental effects in generalized linear models. The correlation coefficient estimated between loin weight and chest girth was high at 0.74. The shank negatively correlated with pelvic width (-0.23) and hipbone width (-0.27). In addition, rib weight and chest girth was highly correlated (0.80). The correlation between carcass weight and chest girth was 0.86 in observed scale. Residual correlation between these traits was estimated at 0.65. Correlation between carcass weight and loin was 0.87 in the observed scale. Residual correlation was estimated at 0.83. The correlation coefficient estimated between shank weight and brisket and flank weight was negative at -0.69. Chest girth had a high correlation between primal cuts weight and body measurements. Thus, we believe that these results will provide a greater understanding on the relationship of primal cuts and other phenotypes, thus enabling valid production models for Hanwoo steers.

• Journal of Animal Science and Technology
• /
• v.54 no.4
• /
• pp.247-253
• /
• 2012

Ultrasound measures of back fat thickness (UBF), eye muscle area (UEMA) and marbling score (UMS) and carcass measures of carcass weight (CW), backfat thickness (BF), eye muscle area (EMA) and marbling score (MS) were available on 26,129 Hanwoo steers. Statistically significant differences by regions of the farms location and birth years-seasons for the steers taken ultrasound measures and their carcass measures (p<0.01) were found. Steers in Gyeonggi province showed the highest values in ultrasound measures and carcass traits except in BF compared to steers in the other provinces. Comparing between ultrasound and carcass measures, UBF was thicker in general than BF in all regions except in Daejeon city. UEMA was higher than EMA in all regions except in Gyeonggior in Jeju provinces. Especially, the difference in Jeonnam province between UEMA and EMA was $7cm^2$ while the differences between UMS and MS ranged from 0.9 to 2.26 depending on the regions of steers located. Steers born in spring showed greater ultrasound or carcass values than those born in autumn. However, carcass measures of steers born in autumn were greater than those born in spring, 2009 except MS. The pearson and residual correlations were 0.63 and 0.65 between UBF and BF, 0.31 and 0.32 between UEMA and EMA and 0.56 and 0.56 between UMS and MS, respectively.

• Communications for Statistical Applications and Methods
• /
• v.16 no.1
• /
• pp.67-74
• /
• 2009

In order to make the high quality Korean cattle, it has been identified the gene markers which influence to various economic traits. To identify statistically significances among SNP markers, Lee et. al. (2008b) identified SNP(19_1)$^*$SNP(28_2) marker was an important marker in LMA(longissimus muscle dorsi area). In addition, CWT(carcass cold weight) and ADG(average daily gain) are applied for expanded multifactor dimensionality reduction (expanded MDR) method from the comprehensive economic traits. The results showed that SNP(19_1)$^*$SNP(28_2) interaction marker was good and a very meaningful for economic traits.

• 한국벤처창업학회:학술대회논문집
• /
• 2022.11a
• /
• pp.217-226
• /
• 2022

그간 농식품부에서는 세계 여러나라와의 협상을 통해 2021년 6월 기준 홍콩, UAE, 캄보디아, 말레이시아로 수출 가능국을 확대한 것은 사실이나 2015년 한우고기 홍콩 첫 수출 이후 타 국가의 수출실적은 전무한 상황이다. 우리나라의 경우 쇠고기 수출 관련 할랄 인프라가 전무한 것이 가장 큰 문제이지만 더불어 할랄 시장에 대한 이해도와 시장상황에 대한 자료가 부족하여 관련 농가 및 업체들이 투자를 꺼려하는 것도 문제점 중 하나로 지적되고 있다. 본 연구팀은 세계 할랄 시장의 큰 축을 담당하고 있는 UAE, 말레이시아 중 할랄 도축관련 비관세 장벽이 비교적 낮은 말레이시아의 시장조사 및 관련기관 인터뷰를 실시하여 말레이시아 시장에서 한우고기의 가격경쟁력을 분석하였다. 조사·분석 결과 한우고기 1++등급의 경우 수출 조건(냉장/냉동) 및 경로(항공/해상)와 상관없이 사태, 앞다리를 제외한 모든 부분육에서 가격경쟁력이 있는 것으로 나타났다. 한우고기 1+등급의 경우 수출 조건(냉장/냉동) 및 경로(항공/해상)와 상관없이 사태, 앞다리를 제외한 모든 부분육에서 가격경쟁력이 있는 것으로 나타났다. 한우고기 1등급의 경우 수출 조건(냉장/냉동) 및 경로(항공/해상)와 상관없이 등심, 채끝 부분육에서 가격경쟁력이 있는 것으로 나타났다.