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- Title
Opportunities for genome-wide selection for pig breeding in developing countries.
- Authors
Akanno, E. C.; Schenkel, F. S.; Sargolzaei, M.; Friendship, R. M.; Robinson, J. A. B.
- Abstract
Genetic improvement of exotic and indig-enous pigs in tropical developing countries is desired. Implementations of traditional selection methods on trop-ical pig populations are limited by lack of data recording and analysis infrastructure. Genome-wide selection (GS) provides an approach for achieving faster genetic prog-ress without developing a pedigree recording system. The implications of GS on long-term gain and inbreeding should be studied before actual implementation, especial-ly where low linkage disequilibrium (LD) is anticipated in the target population. A simulation case study of this option was performed on the basis of the available 60,000 SNP panel for porcine genome. Computer simulation was used to explore the effects of various selection meth- ods, trait heritability, and different breeding programs when applying GS. Genomic predictions were based on the ridge regression method. Genome-wide selection performed better than BLUP and phenotypic selection methods by increasing genetic gain and maintaining genetic variation while lowering inbreeding, especially for traits with low heritability. Indigenous pig populations with low LD can be improved by using GS if high-den-sity marker panels are available. The combination of GS with repeated backcrossing of crossbreds to exotic pigs in developing countries promises to rapidly improve the genetic merit of the commercial population. Application of this novel method on a real population will need to be performed to validate these results.
- Subjects
SWINE genetics; ANIMAL genetics research; ANIMAL breeding research; ANIMAL populations; ANIMAL genome mapping
- Publication
Journal of Animal Science, 2013, Vol 91, Issue 10, p4617
- ISSN
0021-8812
- Publication type
Article
- DOI
10.2527/jas.2013-6102