A. Koeck
University of Guelph
28 Papers
111 Citations
A. Koeck is an academic researcher from University of Guelph. The author has contributed to research in topics: Genetic correlation & Dairy cattle. The author has an hindex of 14, co-authored 28 publications.
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Papers
Genetic analysis of milk β-hydroxybutyrate and its association with fat-to-protein ratio, body condition score, clinical ketosis, and displaced abomasum in early first lactation of Canadian Holsteins.
A. Koeck,Janusz Jamrozik,Flavio S Schenkel,R. K. Moore,D.M. Lefebvre,David F. Kelton,Filippo Miglior +6 more
TL;DR: Genetic parameters for milk β-hydroxybutyrate (BHBA) in early first lactation of Canadian Holstein cows and its genetic association with indicators of energy balance and body condition score revealed that selection for lower milk BHBA in early lactation would lead to an improvement of several health and fertility traits.
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Alternative somatic cell count traits to improve mastitis resistance in Canadian Holsteins.
TL;DR: Breeding values for mean SCS in early lactation, standard deviation of SCS, and an excessive test-day SCC pattern were the best predictors of the breeding value formastitis resistance and explained in total 41% of the variation in relative breeding values for mastitis resistance.
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Genetic relationships of clinical mastitis, cystic ovaries, and lameness with milk yield and somatic cell score in first-lactation Canadian Holsteins
A. Koeck,S. Loker,S. Loker,Filippo Miglior,David F. Kelton,Janusz Jamrozik,Flavio S Schenkel +6 more
TL;DR: The genetic correlations between daily milk yield and cystic ovaries were near zero at the beginning of lactation and were highest at mid and end lactation, whereas a moderate, but nonsignificant, correlation of 0.27 was observed between SCS and lameness.
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Genetic associations of ketosis and displaced abomasum with milk production traits in early first lactation of Canadian Holsteins
TL;DR: A higher Fat% and F:P ratio and a lower Prot% at the first test day were associated with an increased susceptibility to metabolic diseases, and dairy producers should be encouraged to keep accurate and complete health data.
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Genetic analysis of superovulatory response of Holstein cows in Canada.
C. Jaton,A. Koeck,Mehdi Sargolzaei,F. Malchiodi,Christopher A. Price,Flavio S Schenkel,Filippo Miglior +6 more
TL;DR: A genetic analysis for superovulatory response of Holstein cows in Canada using data recorded by Holstein Canada showed that selection for a higher response to superovulation would lead to a slight decrease in milk production, but an improvement for functional traits, including all reproduction traits.
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