Phenotypic and genetic variation in longevity of Polish Landrace sows

The influence of some production traits on the longevity of Polish Landrace sows was evaluated using survival analysis. Estimates of genetic parameters were obtained from the sire and animal components in linear and survival methodologies. Comparison between survival and linear models was based on h...

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Bibliographic Details
Published in:Journal of animal breeding and genetics (1986) 2015-08, Vol.132 (4), p.318-327
Main Authors: Sobczyńska, M., Blicharski, T.
Format: Article
Language:English
Subjects:
Animal reproduction
Animals
Breeding
Female
Genetic diversity
Genetic parameters
Genetic Variation
Genotype & phenotype
Hogs
longevity
Longevity - genetics
Phenotype
removal risk
Seasons
sow
Survival Analysis
Swine - genetics
Swine - physiology
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Summary:The influence of some production traits on the longevity of Polish Landrace sows was evaluated using survival analysis. Estimates of genetic parameters were obtained from the sire and animal components in linear and survival methodologies. Comparison between survival and linear models was based on heritabilities and ranking of estimated breeding values of sires. The same data set, 13 031 sows, was used for both methodologies, even in the presence of censored observations. The effects of herd*year and year*season of the first farrowing had the largest influence on the risk of culling of sows. Sows born in spring season (March–May) had a 24% (p 
ISSN:0931-2668
1439-0388
DOI:10.1111/jbg.12135