Evaluation of score for subclinical ketosis risk in Czech Holstein cows

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F20%3AN0000155" target="_blank" >RIV/00027014:_____/20:N0000155 - isvavai.cz</a>

Výsledek na webu

<a href="http://acta.fapz.uniag.sk/journal/index.php/on_line/article/view/722/pdf" target="_blank" >http://acta.fapz.uniag.sk/journal/index.php/on_line/article/view/722/pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.15414/afz.2020.23.mi-fpap.250-257" target="_blank" >10.15414/afz.2020.23.mi-fpap.250-257</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evaluation of score for subclinical ketosis risk in Czech Holstein cows

Popis výsledku v původním jazyce

This study aimed to evaluate the score for subclinical ketosis risk, which is routinely monitored in Czech Holstein cows. The score is based on milk recording indicator traits which include fat-to-protein ratio, fat-to-lactose ratio, citric acid, β-hydroxybutyrate, and acetone concentrations. The score was significantly (P < 0.001) affected by the age of cow at calving, days in milk (DIM) and season of test day recording. Variance components were estimated with a univariate linear animal model for the score on the first test day and with a multivariate linear animal model for the score in 3 successive test-days (6-40, 30-70, 60-100 DIM). The heritability estimate was lower at the beginning of lactation (0.08) and increased gradually to 0.11 at the end of the recorded period. Genetic correlations between the score at the first and the other two test-days were lower than 1 indicating that they are genetically different traits. Estimated breeding values were normally distributed with mean 0.20 and reliabilities up to 0.66 in females and 0.98 in males. Breeding values were negatively correlated with most of other routinely evaluated traits, with the strongest correlations with milk fat percentage (0.39), body condition score (-0.26) and fertility of cows (-0.25). The score for subclinical ketosis risk showed sufficient genetic variability and had the potential to be used in genetic improvement of resistance to (sub)clinical ketosis of Czech Holstein cows.

Název v anglickém jazyce

Evaluation of score for subclinical ketosis risk in Czech Holstein cows

Popis výsledku anglicky

This study aimed to evaluate the score for subclinical ketosis risk, which is routinely monitored in Czech Holstein cows. The score is based on milk recording indicator traits which include fat-to-protein ratio, fat-to-lactose ratio, citric acid, β-hydroxybutyrate, and acetone concentrations. The score was significantly (P < 0.001) affected by the age of cow at calving, days in milk (DIM) and season of test day recording. Variance components were estimated with a univariate linear animal model for the score on the first test day and with a multivariate linear animal model for the score in 3 successive test-days (6-40, 30-70, 60-100 DIM). The heritability estimate was lower at the beginning of lactation (0.08) and increased gradually to 0.11 at the end of the recorded period. Genetic correlations between the score at the first and the other two test-days were lower than 1 indicating that they are genetically different traits. Estimated breeding values were normally distributed with mean 0.20 and reliabilities up to 0.66 in females and 0.98 in males. Breeding values were negatively correlated with most of other routinely evaluated traits, with the strongest correlations with milk fat percentage (0.39), body condition score (-0.26) and fertility of cows (-0.25). The score for subclinical ketosis risk showed sufficient genetic variability and had the potential to be used in genetic improvement of resistance to (sub)clinical ketosis of Czech Holstein cows.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

40203 - Husbandry

Projekt

<a href="/cs/project/QK1910320" target="_blank" >QK1910320: Výzkum postupů šlechtění dojeného skotu s cílem zvýšit odolnost k nemocem využitím genomických plemenných hodnot, rozvoje systému sběru zdravotních dat a cílené genotypizace skotu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Acta Fytotechnica et Zootechnica

ISSN

1336-9245

e-ISSN

—

Svazek periodika

23

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

8

Strana od-do

250-257

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85097632356