Genome-wide association QTL mapping for teat number in a purebred population of Duroc pigs

Summary Because of increasing litter size in Western pig breeds, additional teats are desirable to increase the capacity for nursing offspring. We applied genome‐wide SNP markers to detect QTL regions that affect teat number in a Duroc population. We phenotyped 1024 animals for total teat number. A...

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Bibliographic Details
Published in:Animal genetics 2015-10, Vol.46 (5), p.571-575
Main Authors: Arakawa, A., Okumura, N., Taniguchi, M., Hayashi, T., Hirose, K., Fukawa, K., Ito, T., Matsumoto, T., Uenishi, H., Mikawa, S.
Format: Article
Language:English
Subjects:
Animals
Bayes Theorem
Bayesian method
Breeding
Chromosome Mapping
Female
Genetic Markers
Genome-Wide Association Study
Litter Size
Mammary Glands, Animal
Phenotype
Polymorphism, Single Nucleotide
Quantitative Trait Loci
Sus scrofa - classification
Sus scrofa - genetics
swine
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Summary:Summary Because of increasing litter size in Western pig breeds, additional teats are desirable to increase the capacity for nursing offspring. We applied genome‐wide SNP markers to detect QTL regions that affect teat number in a Duroc population. We phenotyped 1024 animals for total teat number. A total of 36 588 SNPs on autosomes were used in the analysis. The estimated heritability for teat number was 0.34 ± 0.05 on the basis of a genomic relationship matrix constructed from all SNP markers. Using a BayesC method, we identified a total of 18 QTL regions that affected teat number in Duroc pigs; 9 of the 18 regions were newly detected.
ISSN:0268-9146
1365-2052
DOI:10.1111/age.12331