• Journal of the Korean Data and Information Science Society
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• 제27권3호
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• pp.733-739
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• 2016

본 연구는 이미 한우에서 검증된 지방산 합성 효소 유전자의 g.15532 C>A, g.17924 G>A 단일염기다형성과 암소의 후대들 중 거세우의 도체성적을 이용하여 유전자 활용에 대한 방안을 모색하고자 한다. 이 단일염기다형성의 유전자형을 분석하기 위해 경북지역에서 사육된 암소 270두와 이들의 후대들 중 도체성적이 있는 거세우 270두의 게놈 DNA를 추출하여 단일염기확장법으로 유전자형을 분석하였다. 본 연구에 사용된 통계모델은 GLM의 ANCOVA 방식을 사용하였다. 한우 거세우와 암소집단에서 g.15532 C>A와 g.17924 G>A 단일염기다형성들과 근내지방도간 연관분석을 한결과 거세우집단에서 근내지방도와 유의적인 차이를 나타내었지만 암소집단에서는 유의적인 차이를 나타내지 않았다. 하지만 일반 한우농가에서 개량하는 있는 방식인 후대검정우 등급판정 결과를 이용하여 이 단일염기다형성과 분석한 결과 암소 집단에서 유의적인 차이를 나타내었다. 따라서 g.15532 C>A와 g.17924 G>A 단일염기다형성은 한우 암소 개량에 있어 후대검정우 등급판정결과와 조합하여 사용할 경우 근내지방도 개량에 효율적인 선발 보조도구 활용가치가 높을 것이라 판단되어진다.

• Journal of Animal Science and Technology
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• 제66권3호
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• pp.614-629
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• 2024

Hanwoo beef is in high demand because of its unique flavor, freshness, and high-fat content. However, the longer rearing period required to enhance marbling in Hanwoo cattle has adverse environmental consequences, such as greenhouse gas emissions and overall rearing costs. To address consumer preferences for leaner and healthier meat, the Korean meat industry has recently introduced Hanwoo heifer meat as an alternative source, but its quality traits are still unclear. Nevertheless, there is a limited body of research exploring the impact of Hanwoo gender (steer, heifer, and cow) and their corresponding slaughter ages on meat quality traits. This study looked into how gender affected the physicochemical and qualitative features of Hanwoo striploin at their respective slaughter ages. Results revealed that cow striploin has higher levels of moisture (66.81%) and protein (20.76%), whereas it contains lower levels of fat (10.66%) and cholesterol (34.66 mg/100 g). Regarding the physicochemical properties, cow striploin exhibited significantly lower shear force, color indexes, and soluble collagen (p < 0.05). However, chondroitin (1.19%) and muscle fiber area (1,545.23 ㎛²) were significantly higher in steer striploin than in heifer and cow (p < 0.05). Cow striploin exhibited significantly higher levels of oleic acid, unsaturated fatty acids (UFAs), and monounsaturated fatty acids (MUFAs) while having lower levels of eicosadienoic acid and atherogenic index compared to the other two groups. Cows and heifers had higher concentrations of amino acid metabolites than striploin from steers. Furthermore, bioactive metabolites such as carnitine and carnosine content were found higher in cow and heifer respectively. Overall, Hanwoo cattle gender influences the qualitative attributes of striploin; nevertheless, compared to steer and heifer striploin, cow striploin is a relatively good source of protein, fatty acid content, and metabolites conducive to a healthy diet.

• 한국수정란이식학회지
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• 제30권3호
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• pp.189-193
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• 2015

Calculating break-even price of calf production is closely associated with reproductive efficiency. To determine the price, we need data from reproduction records including number of claves weaned, number of cows exposed for breeding, and annual cash coast per cow, and average weaning or market weight of claves sold and retained. Unfortunately, the data were not available in Korea native cow (Hanwoo). To evaluate the performance and the price, we collected calving interval from about 60,000 cows for last 10 years and estimated reproductive performance. Calving interval was increased 4.3% and pregnancy rate was decreased about 1.4~2.8% year-on-year. Increases in growth rates of number of cow and semen per calf supported the low reproductive performance. Finally, break-even price was calculated using estimated percent calf crop and demonstrated that growth rate of break-even price is larger than that of annual cash per cow, suggesting cow-calf profitability and financial efficiency in Korea native cow (Hanwoo) is getting worse.

• 한국수정란이식학회지
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• 제28권2호
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• pp.79-85
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• 2013

The recent development in genetic assisted selection (combining traditional- and genome assisted selection method) and reproduction technologies will allow multiplying elite cow in Hanwoo small farm. This review describes the new context and corresponding needs for genome assisted selection schemes and how reproductive technologies can be incorporated to get more genetic gain for cow genetic improvement in Hanwoo. New improved massive phenotypes and pedigree information are being generated from commercial farm sector and these are allowing to do genetic evaluation using BLUP to get elite cows in Korea. Moreover cattle genome information can now be incorporated into breeding program. In this context, this review will discuss about combining the reproductive techniques (Multiple Ovulation Embryo Transfer; MOET) and genome assisted selection method to get more genetic gain in Hanwoo breeding program. Finally, how these technologies can be used for multiplication of elite cow in small farm was discussed.

• 대한수의학회지
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• 제62권4호
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• pp.32.1-32.4
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• 2022

A Hanwoo cow with a delayed gestation and abdominal distension was delivered following PGF_2α injection. There was excessive amniotic fluid, and a male calf was delivered but died immediately. The calf had no eyes and nose, and a cleft palate on the upper jaw. Gross appearance and computed tomography image showed that upper teeth were spread out on both sides due to cleft palate in the upper jaw, and lower jaw and teeth were positioned upward. There were no other brain parts except cerebellum. These findings show a rare case of hydramnios related to fetal congenital deformity in a Hanwoo cow.

• 한국축산식품학회지
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• 제33권3호
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• pp.331-334
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• 2013

Osteopontin (OPN) is a secreted phosphorylated glycoprotein. It has an important role in multiple biological processes including cell survival, bone remodeling, inhibition of ectopic calcification, as well as, is thought to have potential immune modulation activities. In this work, we isolated and characterized a full-length open reading frame (ORF) of Korean native cow's OPN from Korean native cow's (Hanwoo) kidney, and successfully cloned firstly on Hanwoo's OPN. The sequencing results indicated that the isolated cDNA was 1190 bp in length containing a complete ORF of 837 bp. It encoded a precursor protein Hanwoo's OPN consisting of 278 amino acids with a signal peptide of 16 amino acids. Amino acid homology was found to be 99.3% as compared to the corresponding sequences of Holstein bone marrow OPN. Hanwoo's kidney OPN and Holstein bone marrow OPN are different only in two amino acid residues 42 and 56, amino acid residue 42 is Thr (T) ${\leftrightarrow}$ Ile (I), and amino acid residue 56 is Ala (A) ${\leftrightarrow}$ Thr (T) respectively. These results from the present work would be helpful to elucidate the biological function of Hanwoo's OPN and provided a foundation for further insight into role of Hanwoo's OPN.

• 한국식품영양과학회지
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• 제28권6호
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• pp.1288-1292
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• 1999

The physicochemical properties and palatability of Hanwoo(cow, steer, and bull) beef loin(1＋ carcass grade) were studied. pH(5.56~5.69), moisture content(67.6~69.0%), crude protein content(17.8~18.7%), and crude fat content(11.9~13.8%) of Hanwoo beef loin did not show significant difference between the types of Hanwoo. L(44.5~46.9), a(19.9~20.6), and b(10.3~11.6) color parameters, water holding capacity (69.4~70.5%), volatile basic nitrogen content(9.86~11.28mg%), thiobarbituric acid value(0.148~0.158 mg malonaldehyde/kg), and cooking loss(26.3~27.9%) of beef loin did not show significant difference between the types of Hanwoo either. Hardness, myofibrillar fragmentation index(MFI), and chewiness of beef loin were 6.1~6.9 dyne/cm2, 50.3~54.9, and 39.5~ 52.0g, respectively. No differences were found in hardness and MFI between the types of Hanwoo, while chewiness of cow was much lower than that of steer and bull(p<0.05). Cow was the best in palatability.

• 한국유기농업학회지
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• 제31권4호
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• pp.327-341
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• 2023

The Ministry of Agriculture, Food and Rural Affairs, Hanwoo Association and Nonghyup have discussed proactive reduction measures for cows in response to concerns about an oversupply of hanwoo to ensure supply stability. This study aims to empirically analyze whether the cow fattening support program is being implemented in line with its objectives. Based on the analysis of beef traceability data, the slaughter age of participating cows was reduced by 7.6 to 14.7 months compared to non-participating cows. And heifer was reduced 1.5 months in their slaughter age. In case of parity, participating cows showed a reduction of 1.4 compared to non-participating cows. Through the SUR model, an analysis was conducted to examine the effect of the cow fattening support program on the suppression of calf production numbers. The analysis results showed that the calf production numbers are positively influenced by the number of fertile cow and the quantity of semen sales. Furthermore, it is estimated that calf production decreased as the fat index increased, and during the period when the cow fattening support program was implemented, an average monthly suppression of 3,558 calves was observed.

• 한국가축번식학회지
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• 제25권3호
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• pp.231-235
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• 2001

임신기간은 주요 경제형질 중 하나로서, 임신기간의 단축은 생산비를 감소시켜 한우산업의 경쟁력을 재고시킬 수 있다. 따라서 본 연구는 임신기간에 영향을 미칠 것으로 예상되는 요인들의 효과를 분석하고 대안을 제시하기 위하여 실시하였다. 빈우의 임신기간은 빈우의 산차에 의해 영향을 받지 않았으나, 사육농가와 수정년도 및 종모우에 따라 유의한 차이가 있었다 따라서 임신기간을 단축시키기 위해서는 빈우의 사양환경을 최적화하고 영양관리를 적정화하며 적절한 종모우를 선택하여 인공수정에 사용하여야 한다.

• 한국수정란이식학회지
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• 제25권1호
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• pp.57-66
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• 2010

The conception rate of cow is a major factor in farm management. The environment of farm and management of cow are the best influencing factors on conception rate, and the fertility of bull is the second influencing factor. In Hanwoo bull, however, the informations limited to performance and carcass traits have been offered to Hanwoo farmer. Therefore, this study analysed the estimated relative conception rates (ERCR) for estimation of fertility of bulls, using the 8,892 mating data with 116 heads of prove bull to produce progeny. Mean of least square means of conception rate after first insemination was 50.95% in bull herds. On the standard of this mean, ERCRs after first insemination of each bull were analysed. Values ranged from -26.1% to +21.0%, the difference was 47.1%. Among 116 heads of bull analysed, KPN582 showed the highest ERCR as 21.0%, KPN550 (18.3%), KPN656 (16.7%), KPN632 (15.8%), KPN690 (14.9%) were gone behind, but KPN621 was the lowest as -26.1%, KPN680 (-21.3%), KPN674 (-16.2%), KPN569 (-15.9%), KPN699 (-14.9%) were succeeded. If ERCRs of Hanwoo bull will be offered to Hanwoo farmer, it will be worthwhile.