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http://dx.doi.org/10.5187/JAST.2010.52.1.001

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

Roh, Seung-Hee (Hanwoo Improvement Center. NACF)
Kim, Chang-Yeup (Hanwoo Improvement Center. NACF)
Won, You-Seog (Hanwoo Improvement Center. NACF)
Park, Chel-Jin (Hanwoo Improvement Center. NACF)
Lee, Sung-Soo (Hanwoo Improvement Center. NACF)
Lee, Jeng-Gyu (Division of Applied Life Science, GyeongSang National University)
Publication Information
Journal of Animal Science and Technology / v.52, no.1, 2010 , pp. 1-8 More about this Journal
Abstract
This study is conducted to use the real-time ultrasound measurement data of Hanwoo as basic data being available to improvement. We used the ultrasound measurement data of 1,125 heads of performance tested cattle and the carcass data after castrating at about 12 months of age, fattened to 30 months, and then sold. For 921 heads of progeny tested cattle, we used test data and slaughter data. Heritabilities of ultrasound data for longissimus muscle area and backfat thickness measured at 12 months of age were estimated as 0.57 and- 0.41, respectively, and at 24 months of age, it was 0.57 and- 0.60, respectively, with high heritability. However, in estimation value of heritability containing ultrasound measurement for percent intramuscular fat, it showed low and medium heritability as 0.14 at 12 months of age and 0.22 at 24 months of age for each. The longissimus muscle area, backfat thickness, and percent intramuscular fat of ultrasound measure traits and longissimus muscle area, backfat thickness, marbling score of carcass traits genetic correlation of at 12 months of age were estimated as 0.616, 0.544, 0.501, respectively and at 24 months of age, it showed high genetic correlation as 0.894, 0.937, 0.263, respectively. As a result of ranking correlation between selection index by using weight, carcass traits at 12 months of age and selection index based on ultrasound measurement data which has high genetic correlation, in data of ultrasound measurement at 12 months of age, it showed high ranking correlation as that selection index of young bull was 0.140 and that of proven bull was 0.843.
Keywords
Hanwoo; Real-time ultrasound measurement; Heritability; Genetic correlation; Rank correlation;
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Times Cited By KSCI : 3  (Citation Analysis)
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