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

Kód výsledku v 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>

Výsledek na webu

<a href="http://www.agriculturejournals.cz/publicFiles/41583.pdf" target="_blank" >http://www.agriculturejournals.cz/publicFiles/41583.pdf</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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).

Název v anglickém jazyce

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

Popis výsledku anglicky

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).

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

GI - Šlechtění a plemenářství hospodářských zvířat

OECD FORD obor

—

Projekt

<a href="/cs/project/QH71275" target="_blank" >QH71275: Výzkum faktorů ovlivňujících zdraví a dlouhověkost dojnic</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Czech Journal of Animal Science

ISSN

1212-1819

e-ISSN

—

Svazek periodika

56

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

251-260

Kód UT WoS článku

000292454600001

EID výsledku v databázi Scopus

—