Breeding values prediction for clinical mastitis in Czech Holstein cattle

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F20%3AN0000174" target="_blank" >RIV/00027014:_____/20:N0000174 - isvavai.cz</a>

Výsledek na webu

<a href="http://acta.fapz.uniag.sk/journal/index.php/on_line/article/view/718/pdf" target="_blank" >http://acta.fapz.uniag.sk/journal/index.php/on_line/article/view/718/pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.15414/afz.2020.23.mi-fpap.233-240" target="_blank" >10.15414/afz.2020.23.mi-fpap.233-240</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Breeding values prediction for clinical mastitis in Czech Holstein cattle

Popis výsledku v původním jazyce

This study aims to genetically evaluate clinical mastitis (CM) in Holstein cattle using a two-trait repeatability animal model with the average lactation somatic cell score (LSCS) as an indicator trait of mastitis. The data set included 21,786 Holsteins with 29,110 lactations in 59 herds and with a calving date between 2015 and 2019. CM was considered as an all-or-none trait (values 0 or 1) in the period from calving to 305 days in milk, and the LSCS was obtained by logarithmic transformation of the average of the individual test-day records for somatic cell count over lactation. Heritability of CM was estimated using a single-trait repeatability animal model, whereas the genetic correlation between CM and LSCS was assessed through a two-trait repeatability animal model. Fixed effects included in the analyses were parity-age and herd-year-season, and the random effects were the permanent environment and the animal. The (co)variance matrix was employed in breeding values estimation for both single-trait (only CM) and bivariate models (CM and LSCS) including genomic prediction. Only genotyped sires formed the reference population for the single-step genomic evaluation. The heritability for CM was 0.04 in the single-trait and 0.05 in the two-trait analysis. Genetic correlation between CM and LSCS was 0.80. The employment of the two-trait model had a considerably strong influence on reliability. The reliability increased for cows with records as well as for the genotyped sires. This study indicates that the two-trait analysis of CM and LSCS is feasible and improves the reliability of the estimated breeding values.

Název v anglickém jazyce

Breeding values prediction for clinical mastitis in Czech Holstein cattle

Popis výsledku anglicky

This study aims to genetically evaluate clinical mastitis (CM) in Holstein cattle using a two-trait repeatability animal model with the average lactation somatic cell score (LSCS) as an indicator trait of mastitis. The data set included 21,786 Holsteins with 29,110 lactations in 59 herds and with a calving date between 2015 and 2019. CM was considered as an all-or-none trait (values 0 or 1) in the period from calving to 305 days in milk, and the LSCS was obtained by logarithmic transformation of the average of the individual test-day records for somatic cell count over lactation. Heritability of CM was estimated using a single-trait repeatability animal model, whereas the genetic correlation between CM and LSCS was assessed through a two-trait repeatability animal model. Fixed effects included in the analyses were parity-age and herd-year-season, and the random effects were the permanent environment and the animal. The (co)variance matrix was employed in breeding values estimation for both single-trait (only CM) and bivariate models (CM and LSCS) including genomic prediction. Only genotyped sires formed the reference population for the single-step genomic evaluation. The heritability for CM was 0.04 in the single-trait and 0.05 in the two-trait analysis. Genetic correlation between CM and LSCS was 0.80. The employment of the two-trait model had a considerably strong influence on reliability. The reliability increased for cows with records as well as for the genotyped sires. This study indicates that the two-trait analysis of CM and LSCS is feasible and improves the reliability of the estimated breeding values.

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

n

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

8

Strana od-do

233-240

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85097599253