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. 2015 Oct;46(5):571-5.
doi: 10.1111/age.12331. Epub 2015 Jul 22.

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

A Arakawa  1 , N Okumura  2 , M Taniguchi  1 , T Hayashi  3 , K Hirose  4 , K Fukawa  4 , T Ito  4 , T Matsumoto  5 , H Uenishi  1   6 , S Mikawa  1
Affiliations

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

A Arakawa et al. Anim Genet. 2015 Oct.

Abstract

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.

Keywords: Bayesian method; genome-wide association study; swine.

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