Studies on Genetic Parameter Estimation and Sire Selection to Ultrasound Measurement Traits of Hanwoo

Roh, Seung Hee; Kim, Chang Yeup; Won, Y. S.; Park, Chel Jin; Lee, Sungsoo; Lee, Jeng Gyu

doi:10.5187/jast.2010.52.1.001

Cited by 18 publications

(30 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The estimate for MS was similar to that of Crews and Kemp (2001) or that of Roh et al (2010). Others reported somewhat lower estimates than ours that ranged from 0.44 (Hwang et al, 2008) to 0.51 (Roh et al, 2004).…”

Section: Resultssupporting

confidence: 69%

Genetic Analysis of Ultrasound and Carcass Measurement Traits in a Regional Hanwoo Steer Population

Hwang¹,

Cheong²,

Kim³

et al. 2014

Asian Australas. J. Anim. Sci

View full text Add to dashboard Cite

Ultrasound measurements of backfat thickness (UBF), longissimus muscle area (ULMA) and marbling score (UMS) and carcass measurements of carcass weight (CW), backfat thickness (BF), longissimus muscle area (LMA), and marbling score (MS) on 7,044 Hanwoo steers were analyzed to estimate genetic parameters. Data from Hanwoo steers that were raised, finished in Hoengseong-gun, Gangwon-do (province) and shipped to slaughter houses during the period from October 2010 to April 2013 were evaluated. Ultrasound measurements were taken at approximately three months before slaughter by an experienced operator using a B-mode real-time ultrasound device (HS-2000, FHK Co. Ltd., Tokyo, Japan) with a 3.5 MHz linear probe. Ultrasound scanning was on the left side between 13th rib and the first lumbar vertebrae. All slaughtering processes and carcass evaluations were performed in accordance with the guidelines of beef grading system of Korea. To estimate genetic parameters, multiple trait animal models were applied. Fixed effects included in the models were: the effects of farm, contemporary group effects (year-season at the time of ultrasound scanning in the models for UBF, ULMA, and UMS, and year-season at slaughter in the models for CW, BF, LMA, and MS), the effects of ultrasound technicians as class variables and the effects of the age in days at ultrasound scanning or at slaughtering as linear covariates, respectively for ultrasound and carcass measures. Heritability estimates obtained from our analyses were 0.37 for UBF, 0.13 for ULMA, 0.27 for UMS, 0.44 for CW, 0.33 for BF, 0.36 for LMA and 0.54 MS, respectively. Genetic correlations were strongly positive between corresponding traits of ultrasound and carcass measures. Genetic correlation coefficient between UBF and BF estimate was 0.938, between ULMA and LMA was 0.767 and between UMS and MS was 0.925. These results suggest that ultrasound measurement traits are genetically similar to carcass measurement traits.

show abstract

Section: Resultssupporting

confidence: 69%

Genetic Analysis of Ultrasound and Carcass Measurement Traits in a Regional Hanwoo Steer Population

Hwang¹,

Cheong²,

Kim³

et al. 2014

Asian Australas. J. Anim. Sci

View full text Add to dashboard Cite

show abstract

“…(1) 조기 도축그룹과 만기 도축그룹 내에서 월령에 대한 도체형질들의 직선회귀 (Roh et al, 2010;Lee et al, 2011;Cheng et al, 2012), 한국 종축개량 협회에서 최근 실시한 제14차 한우 고급육 생산 경진대회 출품축 들의 평균 일령이 922일 이었던 점을 감안할 때 31개월령을 초과 한 32개월령부터 도축되는 것을 만기 도축그룹으로 묶는 것이 현 실적일 것이라는 판단 때문이었다.…”

Section: 통계분석unclassified

“…그리고 실제로 농가에서 출하한 거세우들의 도축일령을 보면 대 부분의 최근 연구들에서 평균 31개월 전후인 것으로 보고하고 있 는데 (Roh et al, 2010;Lee et al, 2011;Cheong et al, 2012) …”

unclassified

Estimation of Resonable Market Month of Age for Hanwoo Steer

Yoon¹,

Won²,

Lee³

et al. 2013

Journal of Animal Science and Technology

View full text Add to dashboard Cite

This aim of this study was to estimate the most reasonable slaughter month for Hanwoo steers according to carcass traits. Carcass trait data on Hanwoo steers (17,249 head) were collected from October 2008 to September 2011. To measure the regression coefficients, Hanwoo steers were divided into two groups according to slaughter age: early (25 to 31 months) and late (32 to 38 months) groups. Regression coefficients of carcass traits according to slaughter age were significantly different (p<0.001) with the exception of PPKG (estimated auction price per 1 ㎏ of carcass weight) in the early slaughter age group and MAR (marbling score, p<0.05) and PPKG (p<0.05) in the late slaughter age group. To obtain a positive gross margin, Hanwoo should be slaughtered at around 28 months of age. 그리고 실제로 농가에서 출하한 거세우들의 도축일령을 보면 대 부분의 최근 연구들에서 평균 31개월 전후인 것으로 보고하고 있 는데 (Roh et al., 2010; Lee et al., 2011;Cheong et al., 2012)

show abstract

“…This ultrasonic measurement technique has been used to decide the outgoing time of fattening cattle. In addition, regional Hanwoo complexes were established uniting Hanwoo farms in cities and districts nationwide, and the ultrasonic measurement technique has been actively utilized as a means of breeding cow improvement at the regional level since 2010 (Lee, 2003;Roh et al, 2010). Some research has investigated the correlation of meat quality related traits between methods using ultrasound equipment and actual slaughtered carcasses (Lee et al, 2006;Koo, 2007;Lee et al, 2008;Yoon, 2010;Lee et al, 2011;Kim et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Estimation of Genetic Correlations and Selection Responses for Carcass Traits between Ultrasound and Real Carcass Measurements in Hanwoo Cows

Son¹,

Lee²

2013

Journal of Animal Science and Technology

View full text Add to dashboard Cite

This study was conducted to determine genetic correlations among carcass traits measured by ultrasound and real carcass measurements and to estimate indirect selection responses for real carcass traits based on ultrasound measurements in Hanwoo cows. To accomplish this, 22,080 ultrasound measurement records from 17,926 cows collected from 2001 to 2012 and 11,907 carcass records obtained from fattened cattle from 2008 to 2012 were used. Genetic parameters were estimated based on eye muscle area (EMA), backfat thickness (BF) and marbling score (MS) measured by ultrasound-scanning of live cows and using the official technique on chilled bovine half-carcasses after slaughtering.Heritability and genetic correlation for carcass traits were estimated using a mixed model equation that consisted of environmental effects as fixed parameters and additive genetic effects and residual effects as random parameters, assuming that traits were different between ultrasound and carcass measurements. This statistical method was applied to the average information restricted maximum likelihood method. The heritability of EMA, BF and MS measured by ultrasound were 0.33, 0.61 and 0.46, respectively, while the heritability estimates of the corresponding traits based on carcass measurements were 0.29, 0.40 and 0.38, respectively and the genetic correlation between ultrasound and carcass traits for EMA, BF and MS were 0.41, 0.78 and 0.67, respectively. The genetic correlation between ultrasound and carcass traits was highly positive. Additionally, the selection response for marbling score was estimated to be 0.42 per generation if the cows were selected based on the ultrasound scan marbling score with an assumed selection intensity of 0.8. Overall, these results indicate that the ultrasound scan technique would be applicable to judging cow selection for genetically improved meat quality.

show abstract

Studies on Genetic Parameter Estimation and Sire Selection to Ultrasound Measurement Traits of Hanwoo

Cited by 18 publications

References 16 publications

Genetic Analysis of Ultrasound and Carcass Measurement Traits in a Regional Hanwoo Steer Population

Genetic Analysis of Ultrasound and Carcass Measurement Traits in a Regional Hanwoo Steer Population

Estimation of Resonable Market Month of Age for Hanwoo Steer

Estimation of Genetic Correlations and Selection Responses for Carcass Traits between Ultrasound and Real Carcass Measurements in Hanwoo Cows

Contact Info

Product

Resources

About