Mixed reference population in genomic evaluation for clinical mastitis in Czech Holstein cattle

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027014%3A_____%2F23%3A10005684" target="_blank" >RIV/00027014:_____/23:10005684 - isvavai.cz</a>

Result on the web

<a href="https://acta.fapz.uniag.sk/journal/article/view/185/71" target="_blank" >https://acta.fapz.uniag.sk/journal/article/view/185/71</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.15414/afz.2023.26.01.46-54" target="_blank" >10.15414/afz.2023.26.01.46-54</a>

Result language

angličtina

Original language name

Mixed reference population in genomic evaluation for clinical mastitis in Czech Holstein cattle

Original language description

The accuracy of genomic breeding values (GEBV) for clinical mastitis (CM) of Czech Holstein cattle was analysed. The single-step genomic method and mixed genomic reference populations were employed. Dataset included 92,388 Holstein cows and 160,426 lactations. CM lactation incidence was 19.05%. Cows calved between 2017 and 2022 in 119 herds. A total of 4,969 Holstein sires and 35,814 Holstein females were genotyped. Three genomic matrices were used, two of them encompassing females. The linear animal model with repeatability included fixed effects of herd-year-season and parity-age at calving. The highest average accuracy of GEBV occurred for genotyped cows. SD of GEBV accuracy for bulls was significantly higher than these for cows. The accuracy of genotyped cows with health phenotypes ranged from 0.06 to 0.51. For the genotyped bulls born in 2021 and 2022, the maximal accuracy was 0.37; for genotyped heifers, the maximal accuracy was 0.42. The highest average GEBV accuracy occurred for the reference population with genotyped bulls and genotyped cows with phenotypes. The average accuracy for the young genotyped bulls increased by one percentage point when phenotyped cows were considered in the reference genomic population. The cow&apos;s GEBV accuracy benefited from including their genotypes in the prediction. It has been confirmed that due to the expansion of the genomic reference population to include a group of genotyped cows with phenotypes, the individual accuracy of GEBV for CM had increased.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

40203 - Husbandry

Project

<a href="/en/project/QK1810253" target="_blank" >QK1810253: Improvement of national-wide genomic evaluation of dairy cattle by including cows with domestic production records into genotyped reference population</a><br>

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

Acta Fytotechnica et Zootechnica

ISSN

1336-9245

e-ISSN

—

Volume of the periodical

26

Issue of the periodical within the volume

1

Country of publishing house

SK - SLOVAKIA

Number of pages

9

Pages from-to

46-54

UT code for WoS article

—

EID of the result in the Scopus database

2-s2.0-85164442521