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Genetics of sow performance in piglet production

Lundgren, Helena (2011). Genetics of sow performance in piglet production. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2011:91
ISBN 978-91-576-7635-1
[Doctoral thesis]

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Abstract

The aim of this thesis was to provide knowledge about the genetic relationships concerning sow performance in piglet production. During the last decades, selection in dam lines has focused on increasing litter size and piglet growth.

Consequently, the demand on the sow to provide her piglets with enough milk increases. At the same time, breeding for animals with less fat limits the sow’s possibility to store body reserves to be used during lactation. Poor body condition is related to reproduction problems and welfare problems such as shoulder ulcers.
In this thesis, piglet growth, feed intake, sow body condition, shoulder ulcers and a number of reproduction traits were studied. Breeding for increased mean piglet weight, as a trait of the sow, will increase weight heterogeneity in the litter. Sows with a genetic ability for high feed intake raise heavy litters. A heavy litter is genetically related to poor body condition of the sow at weaning. Shoulder ulcers in lactating sows is a heritable trait. Sows producing heavier piglets and sows with poor body condition have an increased risk of developing shoulder ulcers. It is important to take into account shoulder ulcers in breeding programs to improve both sow welfare and profitability. Selection for high piglet growth may deteriorate the sow’s condition at weaning, which will affect the following reproduction cycle in a negative way. Selection for litter growth or piglet growth (as maternal traits) in 1st litter may prolong the interval from weaning to mating and decrease litter size in 2nd litter.

Maintaining a good body condition is central for sow performance in piglet production and sow body condition should be included in the genetic evaluation to ensure sufficient reproduction and welfare of the sows. Even if selection for improved sow performance in piglet production is important, further development of management and feeding routines is necessary to provide the environment needed for the sows to be able to express their genetic potential.

Authors/Creators:Lundgren, Helena
Title:Genetics of sow performance in piglet production
Series/Journal:Acta Universitatis agriculturae Sueciae (1652-6880)
Year of publishing :2011
Volume:2011:91
Number of Pages:53
Papers/manuscripts:
NumberReferences
I.Canario, L., Lundgren, H., Haandlykken, M. and Rydhmer, L. (2010). Genetics of growth in piglets and the association with homogeneity of body weight within litters. Journal of Animal Science 88, 1240-1247.
II.Lundgren, H., Canario, L., Grandinson, K., Lundeheim, N., Zumbach, B., Vangen O. and Rydhmer, L. (2010). Genetic analysis of reproductive performance in Landrace sows and its correlation to piglet growth. Livestock Science 128, 173-178.
III.Lundgren, H., Zumbach, B., Lundeheim, N., Grandinson, K., Vangen, O., Olsen, D. and Rydhmer, L. (2011). Heritability of shoulder ulcers and genetic correlations with mean piglet weight and sow body condition. Animal, accepted, doi:10.1017/S1751731111001170, 8 pp.
IV.Lundgren, H., Fikse, W.F., Grandinson, K., Lundeheim, N., Canario, L., Vangen, O., Olsen, D. and Rydhmer, L. Genetic parameters for feed intake, litter weight, body condition and reproduction in Norwegian Landrace sows. (In manuscript)
Place of Publication:Uppsala
Publisher:Institutionen för husdjursgenetik, Sveriges lantbruksuniversitet
ISBN for printed version:978-91-576-7635-1
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L02 Animal feeding
L Animal production > L10 Animal genetics and breeding
L Animal production > L52 Animal physiology - Growth and development
L Animal production > L53 Animal physiology - Reproduction
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 402 Animal and Dairy Science > Animal and Dairy Science.
Agrovoc terms:sows, piglets, reproductive performance, genetic correlation, pregnancy, feed intake, body condition, shoulders, lesions, litter weight, growth rate
Keywords:pig, reproduction, genetic correlation, piglet weight, maternal effect, feed intake, body condition, shoulder ulcers, pregnancy, animal production, genetic traits, reproductive performance, growth
URN:NBN:urn:nbn:se:slu:epsilon-e-251
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-251
ID Code:8425
Department:(VH) > Dept. of Animal Breeding and Genetics
External funders:FORMAS and Stiftelsen Lantbruksforskning
Deposited By: Helena Lundgren
Deposited On:11 Nov 2011 07:20
Metadata Last Modified:02 Dec 2014 10:47

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