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Genetic Control of Residual Variance for Teat Number in Pigs
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- Felleki, Majbritt (author)
- Högskolan Dalarna,Statistik,Sveriges Lantbruksuniversitet,Komplexa system - mikrodataanalys
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- Lundeheim, Nils (author)
- Sveriges Lantbruksuniversitet,Domestic Animals in a Changing World
- (creator_code:org_t)
- AAABG, 2013
- 2013
- English.
- In: Proc. Assoc. Advmt. Anim. Breed. Genet.. - : AAABG. ; , s. 538-541
- Conference paper (other academic/artistic)
Abstract
Subject headings
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- The genetic improvement in litter size in pigs has been substantial during the last 10-15 years. The number of teats on the sow must increase as well to meet the needs of the piglets, because each piglet needs access to its own teat. We applied a genetic heterogeneity model on teat numberin sows, and estimated medium-high heritability for teat number (0.5), but low heritability for residual variance (0.05), indicating that selection for reduced variance might have very limited effect. A numerically positive correlation (0.8) between additive genetic breeding values for mean and for variance was found, but because of the low heritability for residual variance, the variance will increase very slowly with the mean.
Subject headings
- LANTBRUKSVETENSKAPER -- Husdjursvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Animal and Dairy Sience (hsv//eng)
- NATURVETENSKAP -- Matematik -- Sannolikhetsteori och statistik (hsv//swe)
- NATURAL SCIENCES -- Mathematics -- Probability Theory and Statistics (hsv//eng)
Keyword
- Complex Systems – Microdata Analysis
- Komplexa system - mikrodataanalys
Publication and Content Type
- vet (subject category)
- kon (subject category)
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