• 생명과학회지
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• 제27권7호
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• pp.760-766
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• 2017

본 연구는 Lysophospholipase I (LYPLA1) 유전자의 SNP 마커인 rs385360448 g.23655332G>C의 유전자형이 제주도 한우와 제주흑한우(한우${\times}$제주흑우, JCC) 집단의 도체형질에 미치는 영향을 시험하였다. 한우 거세우 집단에서 LYPLA1 rs385360448 G/-를 보유한 도체는 C/C 동형접합에 비해 유의적으로 높은 수준의 근내지방도(MARB)와 조직감지수(TI)를 나타내었다(p<0.05). 반면, LYPLA1 유전자형은 도체중, 등지방두께, 등심단면적, 육색, 지방색에서는 유의적인 차이를 보이지 않았다(p>0.05). JCC 거세우에서는 LYPLA1 G/- 도체에서 C/C 동형접합에 비해 등심단면적(EMA)의 수준이 유의적으로 더 높았다(p<0.05). 이번 연구의 결과들은 LYPLA1 유전자형이 소의 등심에서 인지질 대사를 통해 근내지방도와 조직감의 수준과 등심단면적의 수준을 변화시킬 수 있음을 보여주고 있다. 이러한 결과들은 LYPLA1 유전자형이 한우와 제주흑우-유래의 산업화축군에서 도체형질을 개선할 수 있는 유전자 마커로써의 기능을 수행할 수 있을 것으로 기대된다.

• Asian-Australasian Journal of Animal Sciences
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• 제9권4호
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• pp.389-396
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• 1996

In the first of two experiments, liveweight gain responses and carcass characteristics were investigated using two breeds of growing male goats, local (Dhofari) and exotic (Cashmere), fed on a whole pelleted-high fiber date by-products' based diet at 32.5% level (As-fed) supplemented with 12% fish (sardine), (HF-Fish) and a commercial concentrate diet (conc.). The (HF-Fish) diet was formulated to be iso-nitrogenous to the (conc.) diet, supplying 14% CP (DM-basis). Both diets together with Rhodes grass hay (Chloris Guyana) were fed ad libitum. The experimental design was a complete random arranged in a $2{\times}2$ factorial with breeds and diets as the main factors, using six animals per treatment. The experiment lasted for 84 days and goats were penned individually. At the end of the feeding trial, three animals from each treatment group were slaughtered for carcass evaluation. In experiment 2, diets' digestibility and N-balance were determined using 3 sheep per diet. The (HF-Fish) diet significantly(p < 0.05) improved liveweight gain. There was also a significant difference(p < 0.01) between breeds, with Cashmere gaining more than local goats. Feed conversion efficiency, dressing percent and longissimus dorsi area were not significantly affected by diet or breed(p > 0.05). Digestibility of the proximate components and N-balance for both diets were similar and not significantly different(p > 0.05). Fish supplementation greatly improved the digestibility of CF, ADF, NDF, cellulose and hemicellulose. Meat production ost was decreased by 31% due to feeding of the (HF-Fish) diet.

• Asian-Australasian Journal of Animal Sciences
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• 제21권12호
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• pp.1703-1709
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• 2008

As genetic markers, single nucleotide polymorphisms (SNP) are very appropriate for the development of genetic tests for economic traits in livestock. Several microsatellite markers have been identified as useful markers for the genetic improvement of Hanwoo. Among those markers, ILSTS035 was recently mapped at a similar position with four SNPs (AH1_11, AH1_9, 31465_446, and 12273_165) in a linkage map of EST-based SNP in BAT6. Among the four SNPs, two SNPs (31465_446 and 12273_165) were analyzed using BLAST at the NCBI web site. The sequences including the 12273_165 SNP were identified at the intron region within the LOC534614 gene on the gene sequence map (Bos taurus NCBI Map view, build 3.1). The LOC534614 gene represents a protein similar to myosin heavy chain, fat skeletal muscle, embryonic isoform 1 in the dog, and myosin_1 (Myosin heavy chain D) in Macaca mulatta. In cattle, the myosin heavy chain was associated with muscle development. The phenotypic data for growth and carcass traits in the 415 animals were analyzed by the mixed ANCOVA (analysis of covariance) linear model using PROC GLM module in SAS v9.1. By the genotyping of Hanwoo individuals (n = 415) to evaluate the association of SNP with growth and carcass traits, it was shown that the 12273_165 SNP region within LOC534614 may be a candidate marker for growth. The results of the statistical analyses suggested that the genotype of the 12273_165 SNP significantly affected birth weight, weight of the cattle at 24 months of age, average daily gain and carcass cold weight (p<0.05). Consequently, the 12273_165 SNP polymorphisms at the LOC534614 gene may be associated with growth in Hanwoo, and functional validation of polymorphisms in LOC534614 should be performed in the future.

• 한국축산식품학회지
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• 제39권3호
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• pp.388-401
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• 2019

This study was conducted to investigate the effect of the total digestible nutrients (TDN) level of commercial concentrates on growth performance, carcass characteristics, and meat composition of late fattening Hanwoo steers. A total of 28 steers were randomly assigned to one of four dietary groups; T1 (73.30% TDN), T2 (74.50% TDN), T3 (76.40% TDN), and T4 (77.10% TDN). Average daily gain (ADG) was slightly but not significantly higher in the T2 than in the other treatments. Dry matter intake (DMI) and feed conversion ratio (FCR) were higher in the T2 than in the other treatments; however, the differences were not statistically significant. Carcass back fat thickness was thicker in the T4 and marbling score was higher in the T2 than in the other treatments; however, the differences were not statistically significant. The TDN level of concentrates had no effect on the physicochemical characteristics and fatty acid composition of the longissimus muscle. The finding of this study indicate that less than 74% or greater than 75% TDN in the commercial concentrate did not contribute to improve ADG, FCR, marbling score; therefore, in the present study, the recommendable TDN level in the commercial concentrate for late fattening period was 74% to 75% in terms of growth performance and marbling score of Hanwoo steer.

• Asian-Australasian Journal of Animal Sciences
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• 제24권4호
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• pp.457-462
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• 2011

The purpose of this study was to detect QTL for carcass quality on bovine chromosome (BTA) 6 using a high density SNP map in a Hanwoo population. The data set comprised 45 sires and their 427 Hanwoo steers that were born between spring of 2005 and fall of 2007. The steers that were used for progeny testing in the Hanwoo Improvement Center in Seosan, Korea, were genotyped with the 2,535SNPs on BTA6 that were embedded in the Illumina bovine SNP 50K chip. Four different linkage disequilibrium (LD) mapping models were applied to detect significant SNPs for carcass quality traits; the fixed model with a single marker, the random model with a single marker, the random model with haplotype effects using two adjacent markers, and the random model at hidden state. A total of twelve QTL were detected, for which four, one, three and four SNPs were detected on BTA6 under the respective models (p<0.001). Among the detected QTL, four, two, five and one QTL were associated with carcass weight, backfat thickness, longissimus dorsi muscle area, and marbling score, respectively (p<0.001). Our results suggest that the use of multiple LD mapping approaches may be beneficial in increasing power to detect QTL given a limited sample size and magnitude of QTL effect.

• 한국축산식품학회지
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• 제25권4호
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• pp.409-414
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• 2005

The effects of slaughter weight on blood profile and pork qualities of japan berkshires were investigated A total 72 pigs were divided into 3 groups$(125\~130,\;105\~110\;or\;95\~104\;kg)$. At each slaughter weight pigs were conventionally slaughtered and then chilled overnight The carcass characteristics (carcass weight backfat thickness and grades) were determined on those carcass, the muscle longissimus dorsi was removed from each left side at 5th to 13th rib and meat qualities were evaluated. Blood profile including cortisol, creatine phos-phokinase (CPK), lactate dehydrogenase (LDH), glucose and phosphorus was not significantly (p>0.05) different among all slaughter weight, However, the calcium contents of pigs at $95\~104\;kg$ were significantly (p<0.05) higher than the other weights. The carcass weight and backfat thickness of pigs slaughtered at $125\~130\;kg$ were higher than those of $105\~110\;or\;95\~104\;kg$. The carcass grade of pigs slaughtered at $125\~130\;kg$ were significantly (p<0.05) lower than the other weight. The moisture contents of pigs slaughtered at $125\~130\;kg$ were significantly lower than the other weights, but crude protein contents were significantly (p<0.05) higher, Cooking loss and shear lone values of pigs slaughtered at $95\~104\;kg$ were significantly (p<0.05) lower than the other weight. CIE $a^*\;and\;b^*$ values of pigs slaughtered at $105\~110\;kg$ were significantly higher than the other weights. These results imply that the carcass characteristics (carcass weight and backfat thickness) could be affected by slaughter weight the cooking loss and shear force values of pigs slaughtered at $125\~130\;kg$ resulted in higher than those of $105\~110kg\;or\;95\~104\;kg$.

• Journal of Animal Science and Technology
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• 제44권6호
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• pp.685-692
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• 2002

본 연구는 농협중앙회 가축개량사업소와 한우개량단지에서 1991년도부터 1996년도까지 출생하여 사육된 1,823두의 한우 수소에 대한 자료를 이용하여 성장형질과 도체형질의 유전상관을 추정하기 위하여 실시하였으며, DF- REML을 이용한 다형질 Animal Model로 추정하였다. 12개월 체중과 일당증체량은 0.76, 12개월 체중과 체장은 0.79의 유전상관을 나타내었고, 18개월 체중과 일당증체량 및 18개월체중과 체장간의 유전상관은 각각 0.86 및 0.82로 추정되었다. 또한 냉도체중과 도체율, 배최장근단면적, 등지방두께 및 도체장간의 유전상관은 각각 0.39, 0.37, 0.44, 0.63으로 추정되었고, 등지방두께와 근내지방도는 0.36의 유전상관을 나타내었다. 냉도체중과 12개월 체중 및 18개월체중간의 유전상관은 0.71과 0.96으로 높은 정의 상관을 나타내었고, 체장과의 유전상관도 0.63과 0.75로 체중과 유사한 경향을 나타내었다. 도체율과 체중, 일당증체량, 체장, 곤폭 및 흉위간에는 정의 유전상관을 나타냈으며, 배최장근단면적과 성장형질간의 유전상관은 -0.07 ${\sim}$0.32으로 낮게 추정되었고, 등지방두께와 성장형질간 유전상관은 낮게 추정되었지만 18개월령 흉위에서 높게 나타났다. 근내지방도와 18개월 흉위는 0.25의 유전상관 상관이 추정되었다.

• Journal of Animal Science and Technology
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• 제47권2호
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• pp.243-252
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• 2005

• 한국식품영양학회지
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• 제29권6호
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• pp.860-869
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• 2016

This study was a report on 60 heads of Hanwoo steers(5 treatments ${\times}$ 4 heads ${\times}$ 3 repeats). Their start weights were $361.2{\pm}14.39kg$ to $380.5{\pm}27.33kg$; 12.7 to 13.6 months of age. The aim was to investigate the effect of herbal probiotic supplementation on the weight, blood composition, meat quality and immunity in beef. In case of body weight gain, con. 1 plot(183.8 kg) in the early fattening stage, T3 plot(115.1 kg) in the middle fattening stage, and T2 plot(163.3 kg) in the late fattening stage significantly increased(p<0.05). There was a statistically significant difference in the blood content of T-Cho and IgG: con. 1 plot and T1 plot in the early fattening stage, T3 plot and T2 plots in the middle fattening stage, and con. 2 plot and T1~T3 plots in the late fattening stage had higher blood content than that of other treatment plots (p<0.05). In addition, the carcass weight was highest in the T1 plot and T2 plot among the total treatment plots(p<0.05). However, no statistical significant difference was observed in the different treatments; all individual treatment plots(T1~T3 plots) were somewhat higher than the control plots(con. 1~con. 2 plots) with respect to the carcass quantity and carcass quality. Combining and analyzing all results revealed that the dietary addition of herbal probiotics for Hanwoo steers had a positive effect on the improvement of weight, amount of meat, meat quality and immunity.

• Journal of Animal Science and Technology
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• 제45권3호
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• pp.483-490
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• 2003

PSE 발생원인을 규명하고자 제주소재 J 도축장에 출하된 돼지에 대하여 PSE 발생원인을 규명한 결과 도축전 돼지의 취급이 돼지 출하일령을 180일 이상과 이하로 나누어 비교한 결과 PSE 발생율은 180일령 미만은 24.9%, 180일령 이상은 18.9%로 비육일령 연장에 의한 PSE 발생율 감소는 6%인 것으로 분석되었다. 조사두수 50두 이상 농가의 농가별 PSE 발생율을 조사한 결과, 가장 낮은 농가가 17.30%, 가장 높은 농가가 80.36%로 63.06%의 큰 차이를 보였다. 수송 소요시간별 PSE 돈육 발생율은 30분 미만, 30분～1시간 미만에서는 각각 46.66 %, 45.65%로 큰 차이는 보이지 않았지만 1시간 이상 수송시는 35.44%로 수송시간이 증가됨으로 약 9%의 PSE 발생율이 감소하였다. 절식과 계류 유무에 따른 도체율은 당일 도축 72.68%에 대하여 계류시 72.67%로 조사되어 차이가 없는 것으로 분석되었다. 도축전 돼지의 계류 유무에 따른 PSE 발생율은 무계류시 55.66%, 계류시 33.88%로 전일 계류를 실시함으로서 PSE 발생율을 21.74% 감소시킬 수 있었다. 본 연구결과 출하일령의 연장, 도축전 적절한 계류는 돈육의 품질향상에 매우 중요한 요소임을 알 수 있었다. 따라서, 도축전 돼지의 관리와 계류의 중요성에 관심이 필요하다고 하겠다.