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Genome‐wide association QTL mapping for teat number in a purebred population of Duroc pigs
Author(s) -
Arakawa A.,
Okumura N.,
Taniguchi M.,
Hayashi T.,
Hirose K.,
Fukawa K.,
Ito T.,
Matsumoto T.,
Uenishi H.,
Mikawa S.
Publication year - 2015
Publication title -
animal genetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.756
H-Index - 81
eISSN - 1365-2052
pISSN - 0268-9146
DOI - 10.1111/age.12331
Subject(s) - biology , quantitative trait locus , purebred , genome wide association study , heritability , single nucleotide polymorphism , autosome , genetics , snp , population , litter , genetic association , crossbreed , chromosome , genotype , gene , medicine , agronomy , environmental health
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 SNP s 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.