• 농업생명과학연구
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• 제46권1호
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• pp.123-131
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• 2012

본 연구는 한우 성장형질간의 상관분석을 통하여 6, 12, 18, 24개월 체중, 일당증체량, 도체형질과 18개월 체형형질간의 성장단계별 형질간의 상관관계를 파악하고자 실시하였다. 분석에 이용한 자료는 농협중앙회 한우개량사업소에서 후대 검정을 실시한 2004년에서 2008년까지의 거세우 1,838두의 체중과 체형형질을 이용하였고 도체형질은 24개월령 도축성적을 이용하였다. 본 논문에서 상관분석은 관측치 상관과 고정효과를 고려한 잔차상관으로 하였다. 도축 전 생체중과 도체중은 0.92의 높은 상관관계를 가지고 있었다. 도체형질에서는 육량지수와 등지방두께 간에 -0.92의 높은 부의 상관을 보였다. 체형형질에서 십자부고와 체고는 0.89로서 높은 상관관계가 있었으며 흉폭과 흉심이 0.73의 상관관계를 나타냈다. 체위 형질간 상관에서 요각폭에 대해 흉심과 흉폭이 각각 0.75, 0.74의 상관을 보였고 곤폭은 요각폭과 0.74의 상관을 보였다. 좌골폭에 대해서는 흉심, 흉폭, 요각폭, 곤폭이 각각 0.73, 0.70, 0.75, 0.75로 정의 높은 상관을 나타냈다. 체장과 도체중간의 관측치상관은 0.48이였고, 흉위는 도체중과 잔차상관이 0.51로 다른 도체형질보다 상관정도가 높게 나타났다. 따라서 본 연구결과는 한우 후대검정우 유전평가시 기초 자료로 활용 가능할 것으로 예상된다.

• 한국축산식품학회지
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• 제34권2호
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• pp.141-150
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• 2014

This study was conducted to determine the effects of hempseed (H) on performance, carcass traits, and antioxidant activity in Japanese quail (Coturnix coturnix japonica). A total of 192 quail with seven-days old were divided into four experimental groups with four replicates. The treatments were; i) Control diet (C, no hempseed); ii) 5% hempseed in diet (H5); iii) 10% hempseed in diet (H10); and iv) 20% hempseed in diet (H20). The body weight (BW) and feed intake (FI) of quail was determined at 7, 21 and 42 d of age. At 42 d of age four quail were slaughtered and the carcass and internal organ traits were determined. Malondialdehyde (MDA), catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), nitric oxide (NO) and total protein were determined in the blood serum end of the experiment. The BW of the groups were not significant at 7 and 21 d, however in the 20% hempseed group BW decreased at 42 d (p<0.05). The FI and feed conversion ratio were not significant among the treatment groups. The carcass, liver, intestine and heart weight and their percentage to carcass were significantly differ in treatment groups (p<0.05). The serum MDA and NO decreased in hempseed addition (p <0.001). The serum SOD, CAT and GSH-Px were increased by hempseed supplementation (p<0.001). In conclusion, hempseed supplementation to quail diets may not improve quail performance traits but increase antioxidant activity in blood.

• Asian-Australasian Journal of Animal Sciences
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• 제26권6호
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• pp.780-787
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• 2013

The objective of this study was to investigate single nucleotide polymorphisms (SNPs) in the bovine nephroblastoma overexpressed (NOV) gene and to evaluate whether these polymorphisms affect carcass traits in the Korean cattle population. We resequenced to detect SNPs from 24 unrelated individuals and identified 19 SNPs within the full 8.4-kb gene, including the 1.5-kb promoter region. Of these 19 SNPs, four were selected for genotyping based on linkage disequilibrium (LD). We genotyped 429 steers to assess the associations of these four SNPs with carcass traits. Statistical analysis revealed that g.7801T>C and g.8379A>C polymorphisms in the NOV gene were associated with carcass weight (p = 0.012 and 0.008, respectively), and the g.2005A>G polymorphism was associated with the back fat thickness (BF) trait (p = 0.0001). One haplotype of the four SNPs (GGTA) was significantly associated with BF (p = 0.0005). Our findings suggest that polymorphisms in the NOV gene may be among the important genetic factors affecting carcass yield in beef cattle.

• Asian-Australasian Journal of Animal Sciences
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• 제29권1호
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• pp.80-88
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• 2016

Twenty crossbred steers ($400{\pm}40.1kg$ of initial body weight) were used to assess the effects of a dietary supplementation with crude glycerin (CG) as a substitute for corn grain on performance, carcass traits, and meat quality. Four isocaloric and isonitrogenous diets were offered to the experimental animals (5 steers per treatment) for 121 days using randomized complete block design. The steers individually received dietary treatments containing 0%, 7%, 14%, and 21% of CG (88.91% pure) on a dry matter (DM) basis. The diets were offered ad libitum as total mixed rations twice daily. Weight gain and carcass traits were determined. At the end of the experimental period, the harvest data and carcass characteristics of the steers were recorded, and meat quality was determined. No significant effect of CG inclusion was observed in any of the growth performance and carcass characteristics traits studied. Also, there were no apparent effects of diets (p>0.05) on meat quality (pH, water holding capacity, drip losses, and cooking losses). The study concluded that CG could be used as a substitute for corn grain up to the level of approximately 21% of DM in the diets of finishing steers.

• Asian-Australasian Journal of Animal Sciences
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• 제26권10호
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• pp.1359-1364
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• 2013

The purpose of this study was to find any association of the bovine growth hormone (bGH) gene with growth and carcass quality traits in Korean native cattle, Hanwoo. Genomic DNA was extracted from 21 Hanwoo individuals, and the 47 to 2,528 bp region of the bGH 2,856 bp (GenBank accession number M57764) including the promoter and the five exons was sequenced. A total of ten bGH SNPs were confirmed, including four (253 C>T, 303 C>T, 502 C>T, and 559 G>A) in the promoter, one (679 C>T) in exon 1, one (1,692 T>C) in intron 3, and four (2141 C>G, 2258 C>T, 2277 C>T, and 2291 A>C) in exon 5. The ten bGH SNPs were genotyped for a sample of 242 Hanwoo steers and association tests were performed to find any significant SNP that was correlated with growth and carcass quality. Of the SNPs, the 303 C>T SNP in the promoter region was significantly associated with 6-month-old weight, the 559 G>A SNP with longissimus dorsi muscle area, the 2141 C>G SNP in exon 5 with daily weight gain, and the 2258 C>T SNP with daily weight gain and carcass weight (p<0.05). The significant SNPs need to be verified in other Hanwoo populations before considering implementation of marker-assisted selection for genetic improvement of growth and carcass quality in Hanwoo.

• 한국축산식품학회지
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• 제30권6호
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• pp.905-909
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• 2010

Two sets of data on carcass traits and beef cut parameters were used to investigate the relationships between carcass and beef cut measurements, which can be used to make predictions of retail cut percentages. One set had a total of 1,141 measurements of Hanwoo cattle of three different sex origins, which were slaughtered in an abattoir located at the National Institute of Animal Science, RDA, Korea from 1996 to 2008. To develop prediction models for retail cut percentage with higher accuracies than the current model, another set consisting of a total of 13,389 records of carcass and beef cut traits were collected from 30 abattoirs and butcheries in Korea from 2008 to 2009. Bulls yielded heavier and leaner carcasses than steers. High correlation coefficients were estimated between amount of body fat and percent retail cut (-0.82) as well as between back fat thickness (BF) and percent retail cut (-0.62). The amount of retail cut, however, was highly correlated with body weight before slaughter (BW, 0.95) or with cold carcass weight (CWT, 0.94). Relationships between percent retail cut and measurable beef yield traits, BF, loin eye area (LEA) or CWT varied by sex class, which must be considered for development of a prediction model with high accuracy. Models of data for all breeds and sexes fit the effects of breed, sex, and interaction of abattoir by butchers, whereas models of data for each breed and sex fit the effect of interaction of abattoir by butcher only. Due to possible future changes in back fat control, we performed a log transformation of BF. Our new models fit better than the currently used model.

• Animal Bioscience
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• 제36권9호
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• pp.1314-1326
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• 2023

Sheep and goats can efficiently convert low quality forage into high-quality meat which contains specific nutrients and quality traits. Carcass traits and quality attributes of sheep and goat meat depend upon several factors and one of most effective strategies amongst these is feeding regimens. In this review, the major aspects of feeding regimens affecting growth rate, carcass traits and quality attributes of sheep and goat meat are thoroughly discussed, with a particular focus on physical-chemical composition, flavor profile, and fatty acid (FA) profile. Grazing lambs and kids receiving concentrate or under stall-feeding systems had greater average daily gain and carcass yield compared with animals reared on pasture only. However, growth rate was higher in lambs/kids grazing on pastures of improved quality. Moreover, the meat of grazing lambs receiving concentrate had more intense flavor, intramuscular fat (IMF) content, and unhealthy FA composition, but comparable color, tenderness, juiciness, and protein content compared to that of lambs grazed on grass only. In contrast, meat of concentrate-fed lambs had more intense color, greater tenderness and juiciness, IMF and protein contents, and lower flavor linked to meat. Additionally, the meat of kids grazed on concentrate supplementation had higher color coordinates, tenderness, IMF content and unhealthy FA composition, whereas juiciness and flavor protein content were similar. In contrast, kids with concentrate supplementation had superior color coordinates, juiciness, IMF content and unhealthy FA composition, but lower tenderness and flavor intensity compared to pasture-grazed kids. Thus, indoor-finished or supplemented grazing sheep/goats had higher growth rate and carcass quality, higher IMF content and unhealthy FA composition compared to animals grazed on grass only. Finally, supplementation with concentrate increased flavor intensity in lamb meat, and improved color and tenderness in kid meat, whereas indoor-fed sheep/goats had improved color and juiciness as well as reduced flavor compared to pasture-grazed animals.

• Asian-Australasian Journal of Animal Sciences
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• 제6권2호
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• pp.225-234
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• 1993

A total of 333 carcasses were evaluated for hindquarter traits: round weight, percent round, loin weight, percent loin, flank weight and percent flank. Other characteristics included: total retail, lean trim, fat trim, round steaks, rump, sirloin tip, loin steaks, percent loin steaks and flank steaks. Mating types included straightbred Angus and Santa Gertrudis, the reciprocal crosses of these two breeds and Gelbvieh ${\times}$ Angus. Breed of sire and breed of dam were significant for most of the traits evaluated. Calf year and slaughter group were also significant. This could be the result of environmental variations. Effect of sire within sire breed was non-significant for all the traits considered. Heterosis due to interaction between sire breed ${\times}$ dam breed was found significant for percent total retail cuts based on hindquarter weight. Generally, Santa Gertrudis purebreds were more desirable in cut out characteristics than all other breeding types followed by crossbreds of Angus ${\times}$ Santa Gertrudis.

• Asian-Australasian Journal of Animal Sciences
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• 제18권11호
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• pp.1524-1528
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• 2005

Molecular genetic markers were used to detect chromosomal regions which contain economically important traits such as growth, carcass, and meat quality traits in pigs. A three generation resource population was constructed from a cross between Korean native boars and Landrace sows. A total of 240 F2 animals from intercross of F1 was produced. Phenotypic data on 17 traits, birth weight, body weights at 3, 5, 12, and 30 weeks of age, teat number, carcass weight, backfat thickness, body fat, backbone number, muscle pH, meat color, drip loss, cooking loss, water holding capacity, shear force, and intramuscular fat content were collected for F2 animals. Animals including grandparents (F0), parents (F1), and offspring (F2) were genotyped for 80 microsatellite markers covering from chromosome 1 to 10. Least squares regression interval mapping was used for quantitative trait loci (QTL) identification. Significance thresholds were determined by permutation tests. A total of 10 QTL were detected at 5% chromosome-wide significance levels for growth traits on SSCs 2, 4, 5, 6, and 8.

• Journal of Animal Science and Technology
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• 제52권2호
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• pp.157-164
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• 2010

본 연구는 성숙한 한우 암소 도체에서 몇 개의 도체형질들이 경락단가나 도체가격과 같은 가격변수의 변이에 미치는 영향력을 파악하기 위하여 도체형질과 가격변수들 간의 상관관계 추정, 다중회귀분석 및 경로분석 등을 실시했다. 자료는 강원도 홍천지역 한우 사육농가에서 번식우로 사용되다 2008년도에 도축된 96두의 도체 판정결과를 이용하였다. 도축된 암소들의 도축시 평균 나이는 약 51개월 령이었으며, 도살시 생체중, 냉도체중, 등지방두께, 등심면적, 9단계로 구분하여 평가한 근내지방도 및 도체율의 평균치는 각각 556.81 kg, 319.24 kg, 10.95 mm, $78.08\;cm^2$, 3.92 및 57.19%였다. 그리고 도체경락단가와 도체가격은 각각 12,681원 및 4,070천원이었다. 경락단가와 상관계수가 큰 형질은 MAR, DP 및 EMA 등이었고 육량지수는 상관계수가 제일 작았다. 도체 경락단가를 종속변수로 CWT, BFT, EMA MAR 및 DP등 5개의 도체 형질을 독립변수로 적합시켜 추정한 다중회귀 방정식에서 모형 방정식의 결정계수는 69.86%였고, 도체가격을 종속변수로 하여 추정한 모형 방정식의 결정계수는 85.43%였다. 다중회귀 분석에서 CWT, BFT, EMA, MAR 및 DP의 표준화 편회귀계수는 AP를 종속변량으로 한 방정식에서 각각 -0.028, -0.106, 0.107, 0.814, 0.075, 그리고 CP를 종속변량으로 하는 방정식에서는 각각 0.561, -0.060, 0.083, 0.590, 및 0.051으로 나타나 AP의 변이에 큰 영향을 미치는 형질은 MAR 이었고, CP의 변이에 큰 영향을 미치는 형질은 CWT와 MAR이었던 것으로 판단된다. 경로분석 결과에서도 AP의 변이에 큰 영향을 미치는 형질은 MAR로서 직접효과와 간접효과를 합친 MAR의 기여도는 0.668이었다. 그리고 CP의 변이에 영향을 미치는 MAR의 기여도는 0.408 그리고 CWT의 기여도는 0.397이었다. 이상의 결과를 종합해보면 육량지수는 AP나 CP에 큰 영향을 미치지 않으며 AP의 변이에 영향을 크게 미치는 것은 MAR이고 CP에 영향을 크게 미치는 형질은 MAR과 CWT였다.