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Article

Estimation of repeatability of calving ease in Canadian Holsteins.

Journal of dairy science - 1 Jan 1990

Klassen D J, Cue R I, Hayes J F

Abstract excerpt

Restricted maximum likelihood was used to estimate repeatabilities and heritabilities for calving ease from a data set of 636,972 Holstein parturitions obtained from the Quebec Dairy Herd Analysis Service. Subsets of the data, chosen to reflect different stages of cow maturity, were analyzed separately and compared. Initial least squares analyses were used to define the fixed effects to include in the model. The...

Topics

Age Factors
Algorithms
Analysis of Variance
Animals
Breeding
Cattle
Female
Genetic Variation
Labor, Obstetric
Models, Genetic
Parity
Pregnancy

Methodology Data sources Editorial policy Privacy About Contact Helena Bioinformatics

Seasons

Sex Factors

Source

Identifiers

PMID: 2312884
DOI: 10.3168/jds.S0022-0302(90)78665-1

Provenance

PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 29 Aug 2026. Prepared record publication-2312884-2026-08-29.1. Manifest publication-graph-cohort-2026-08-29.1.

Source receipt: PubMed via Helena Literature Corpus, retrieved 29 Aug 2026.

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