Genetic relationship of functional longevity with female fertility and milk production traits in Czech Holsteins

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F13%3A%230001923" target="_blank" >RIV/00027014:_____/13:#0001923 - isvavai.cz</a>
Result on the web
<a href="http://www.agriculturejournals.cz/publicFiles/106671.pdf" target="_blank" >http://www.agriculturejournals.cz/publicFiles/106671.pdf</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Genetic relationship of functional longevity with female fertility and milk production traits in Czech Holsteins
Original language description
The objectives of this study were to estimate heritabilities of and genetic correlations among longevity, milk production, and female fertility traits of Holstein cows. Fertility traits were days open, interval from parturition to first service, and daysbetween the first and last insemination in the first and second lactation, respectively. Production traits were first lactation milk, fat, and protein yield. Functional longevity was defined as the number of days between the first calving and culling, i.e. the length of the productive life. The linear animal model included fixed effects of month-year of first calving, regression on age at first calving, regression on milk yield (only for longevity), and random effects of herd-year, animal, and residual. Heritability estimates for fertility traits ranged from 0,02 ? 0,009 to 0,06 ? 0,004. Heritability of longevity was 0,09. Heritability estimates for production traits ranged from 0,29 ? 0,009 (fat and protein yield) to 0,34 ? 0,009 (mil
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
GI - Farm animal breeding and farm animal pedigree breeding
OECD FORD branch
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Project
<a href="/en/project/QI91A238" target="_blank" >QI91A238: Efficient approaches in dairy herd management</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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