Estimation of the additive and dominance variances in South African Landrace pigs

Thumbnail
View/Open
Issue date
2006
Author
Norris, D.
Varona Aguado, Luís
Visser, D. P.
Theron, H. E.
Voordewind, S. F.
Nesambuni, E. A.
Impact

Google Scholar logo  Google Scholar
Share
Export to Mendeley
Metadata
Show full item record
Abstract
The objective of this study was to estimate dominance variance for number born alive (NBA), 21- day litter weight (LWT21) and interval between parities (FI) in South African Landrace pigs. A total of 26223 NBA, 21335 LWT21 and 16370 FI records were analysed. Bayesian analysis via Gibbs sampling was
used to estimate variance components and genetic parameters were calculated from posterior distributions. Estimates of additive genetic variance were 0.669, 43.46 d2 and 9.02 kg2 for NBA, FI and LWT21, respectively. Corresponding estimates of dominance variance were 0.439, 123.68 d2 and 2.52 kg2, respectively. Dominance effects were important for NBA and FI. Permanent environmental effects were significant for FI and LWT21. It may be beneficial to evaluate non-additive genetic merit of individuals and families in addition to their transmitting abilities. A breeding program that capitalizes on non-additive genetic merit may be desirable.
URI
http://hdl.handle.net/10459.1/49280
Is part of
South African Journal of Animal Science, 2006, vol. 36, núm. 4, p. 261-268
Collections

The following license files are associated with this item:

cc-by (c) Norris et al., 2006
Except where otherwise noted, this item's license is described as cc-by (c) Norris et al., 2006