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KMID : 1025520080500030285
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Journal of Animal Science and Technology
2008 Volume.50 No. 3 p.285 ~ p.292
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Relationship of Somatic Cell Score and Udder Type Traits of Holstein Cattle
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Choi Tae-Jeong
Seo Kang-Seok
Kim Si-Dong
Park Byoung-Ho
Choi Je-Gwan
Yoon Ho-Baek
Na Seung-Hwan
Son Sam-Kyu
Kwon Oh-Seob
Cho Kwang-Hyun
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Abstract
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The objective of this study was to examine the correlation between fore udder attachment, rear udder height, rear udder width, udder cleft, udder depth, and somatic cell score(SCS) of Holsteins in Korea. Generally phenotypic correlations were very low between udder traits and lactation SCS which varied from 0.03 to －0.06. Heritability of all type traits and SCS were all less than 0.12. Phenotypic correlations between udder traits and SCS and udder depth score(higher udders) had lower SCS. Genetic correlations between SCS and udder depth, SCS and front teat length were negative. Heritability of SCS was 0.08, 0.23 for udder depth and 0.22 for front teat length. From the result of this study, there is no phenotypic correlation between udder traits and lactation SCS. However, they were genetically related. Therefore this study should be continuously carried out for future genetic evaluations.
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KEYWORD
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Somatic cell score, DF-REML, Udder type traits
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