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http://dx.doi.org/10.7465/jkdi.2015.26.4.915

(Co)heritability of acetone and β-hydroxybutyrate concentrations in raw milk related to ketosis in Holsteins  

Cho, Kwang-Hyun (National Institute of Animal Science, RDA)
Cho, Chung-Il (National Institute of Animal Science, RDA)
Lee, Joon-Ho (The Genomic Informatics Center, Hankyong National University)
Park, Kyung-Do (The Genomic Informatics Center, Hankyong National University)
Publication Information
Journal of the Korean Data and Information Science Society / v.26, no.4, 2015 , pp. 915-921 More about this Journal
Abstract
This experiment was conducted to estimate the heritability and coheritablity of daily milk yield, acetone and ${\beta}$-hydroxybutyrate (BHBA) concentrations in raw milk. The average concentrations of acetone and BHBA were $135.54{\pm}96.29{\mu}mol$ and $61.08{\pm}66.76{\mu}mol$, respectively, and the differences between high group and low group cows were highly significant (p <0.01). The estimates of heritability of daily milk yield, acetone and BHBA concentrations were in the range of 0.18~0.21, 0.11~0.13 and 0.01~0.02, respectively. The estimate of heritability of $Log_e$acetone did not change much, while that of $Log_eBHBA$ increased to 0.03~0.04. The estimates of phenotypic and genetic correlation coefficients between acetone and BHBA were 0.44 and 0.48, respectively. In low milk yield group, the coheritability estimates of BHBA and $Log_eBHBA$ when selection was for daily milk yield were 0.26 and 0.32, respectively. These were higher than the coheritability estimate of acetone when selection was for daily milk yield. The same trend was noted in the coherihability estimates from the whole records using both high and low milk yield groups together. BHBA concentration seemed to be more effectively responding than acetone concentration when selection was for daily milk yield.
Keywords
Acetone; ${\beta}$-hydroxybutyrate; coheritability; ketosis;
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