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KMID : 1025520090510030255
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Journal of Animal Science and Technology
2009 Volume.51 No. 3 p.255 ~ p.262
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Studies on Live-carcass Trait of Parity and Region in Hanwoo Cows Measured by Real-time Ultrasound
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Ha Jae-Jung
Kim Jong-Bok
Lee Chang-Woo
Song Young-Han
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Abstract
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Current study was conducted to investigate the influence of parity and region variation in ultrasound live carcass traits of Hanwoo cows. A total of 1,386 heads of Hanwoo cows, spreading over six regions in Gangwon province of South Korea, were measured for longissimus muscle area, back fat thickness, marbling score and rump fat thickness by using real-time ultrasound method. The results revealed that, positive correlations were found in all ultrasound live carcass traits. All live carcass traits were increased in accordance with parity until the sixth, and then decreased thereafter. Statistical significant differences (p<0.01) were found among regions in ultrasound live carcass traits, e.g. Hanwoo cows showed highest longissimus muscle area and marbling score in Hwacheon, while the lowest back fat thickness and rump fat thickness were observed in Yanggu. Greater longissimus muscle area and marbling scores were found in Hanwoo cows which were born during autumn, 2000. Moreover, individuals born during autumn, 2005 and 2006 showed a thicker back fat and rump fat thickness. Back fat thickness had the highest positive correlation with rump fat thickness, while rib eye area and rump fat thickness had the lowest correlation.
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KEYWORD
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Hanwoo cows, Region, Parity, Ultrasound, Live carcass trait
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