Comparison between linear and proportional hazard models for the analysis of age at first lambing in the Ripollesa breed.

doi:10.1017/S1751731115002220

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Article

Comparison between linear and proportional hazard models for the analysis of age at first lambing in the Ripollesa breed.

Animal : an international journal of animal bioscience - 1 Mar 2016

Casellas J

Abstract excerpt

Age at first lambing (AFL) plays a key role on the reproductive performance of sheep flocks, although there are no genetic selection programs accounting for this trait in the sheep industry. This could be due to the non-Gaussian distribution pattern of AFL data, which must be properly accounted for by the analytical model. In this manuscript, two different parameterizations were implemented to analyze AFL in the...

Topics

Age Factors
Aging
Animals
Birth Weight
Breeding
Female
Linear Models
Meat
Parturition
Phenotype
Pregnancy
Proportional Hazards Models
Reproduction
Seasons
Selection, Genetic
Sheep, Domestic
Spain

Source

Open in PubMed

Identifiers

PMID: 26549545
DOI: 10.1017/S1751731115002220

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