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Genetic heteroscedasticity of teat count in pigs
Dalarna University, School of Technology and Business Studies, Statistics.
SLU.
2015 (English)In: Journal of Animal Breeding and Genetics, ISSN 0931-2668, E-ISSN 1439-0388, Vol. 132, no 5, 392-398 p.Article in journal (Refereed) Published
Abstract [en]

The genetic improvement in pig litter size has been substantial. The number of teats on the sowmust thus increase as well to meet the needs of the piglets, because each piglet needs access to itsown teat. We applied a genetic heterogeneity model to teat counts in pigs, and estimated a mediumheritability for teat counts (0.35), but found a low heritability for residual variance (0.06),indicating that selection for reduced residual variance might have a limited effect. A numericallypositive correlation (0.8) was estimated between the breeding values for the mean and the residualvariance. However, because of the low heritability of the residual variance, the residual variance will probably increase very slowly with the mean.

Place, publisher, year, edition, pages
2015. Vol. 132, no 5, 392-398 p.
Keyword [en]
Quantitative genetics, genetic heterogeneity of residual variance, pig, teat count
National Category
Agricultural Sciences Probability Theory and Statistics
Research subject
Complex Systems – Microdata Analysis
Identifiers
URN: urn:nbn:se:du-16555DOI: 10.1111/jbg.12134PubMedID: 25817797OAI: oai:DiVA.org:du-16555DiVA: diva2:773511
Available from: 2014-12-19 Created: 2014-12-19 Last updated: 2016-03-16Bibliographically approved

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Citation style
  • apa
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  • nn-NB
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  • asciidoc
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