Genetic parameters for somatic cell score in the first three lactations of Czech Holstein and Fleckvieh breeds using a random regression model

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F11%3A%230001416" target="_blank" >RIV/00027014:_____/11:#0001416 - isvavai.cz</a>
Result on the web
<a href="http://www.agriculturejournals.cz/publicFiles/41583.pdf" target="_blank" >http://www.agriculturejournals.cz/publicFiles/41583.pdf</a>
DOI - Digital Object Identifier
—

Result language
angličtina
Original language name
Genetic parameters for somatic cell score in the first three lactations of Czech Holstein and Fleckvieh breeds using a random regression model
Original language description
A multiple-lactation random regression model was applied to test-day somatic cell score (SCS) records from the first three lactations of Czech Holstein (26 314 cows) and Fleckvieh breed (24 061 cows). The linear model for SCS included fixed herd-test date effect, fixed regressions on days in milk within the age-season class, random regressions for the animal genetic and random regressions for the permanent environmental effect of the cow (Legendre polynomials were used for all regressions.) The resulting daily heritability ranged from 0.08 to 0.11 in the middle part of the lactation and only slightly increased with parity. Daily permanent environmental variances were higher than the genetic variances and daily residual variances decreased with DIM. Theresidual variances in early lactation increased with lactation number. For both breeds, the highest genetic correlations computed for the part of lactation between DIM 45 and DIM 255 were between the second and third lactation (0.95).
Czech name
—
Czech description
—

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
—

Project
<a href="/en/project/QH71275" target="_blank" >QH71275: Investigation of factors influencing health and longevity of dairy cows</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
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)