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Genetic Control of Residual Variance for Teat Number in Pigs
Högskolan Dalarna, Akademin Industri och samhälle, Statistik. Sveriges Lantbruksuniversitet. (Komplexa system - mikrodataanalys)
Sveriges Lantbruksuniversitet. (Domestic Animals in a Changing World)
2013 (engelsk)Inngår i: Proc. Assoc. Advmt. Anim. Breed. Genet., AAABG , 2013, s. 538-541Konferansepaper, Publicerat paper (Annet vitenskapelig)
Abstract [en]

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.

sted, utgiver, år, opplag, sider
AAABG , 2013. s. 538-541
HSV kategori
Forskningsprogram
Komplexa system - mikrodataanalys
Identifikatorer
URN: urn:nbn:se:du-13660OAI: oai:DiVA.org:du-13660DiVA, id: diva2:692781
Konferanse
20th Association for the Advancement of Animal Breeding and Genetics Conference, Napier, New Zealand, 20 to 23 October 2013
Tilgjengelig fra: 2014-02-01 Laget: 2014-02-01 Sist oppdatert: 2014-02-03bibliografisk kontrollert

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Genetic Control of Residual Variance for Teat Number in Pigs(642 kB)113 nedlastinger
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