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QTL mapping for teat number in an Iberian‐by‐Meishan pig intercross
Author(s) -
Rodríguez C.,
Tomás A.,
Alves E.,
Ramirez O.,
Arqué M.,
Muñoz G.,
Barragán C.,
Varona L.,
Silió L.,
Amills M.,
Noguera J. L.
Publication year - 2005
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/j.1365-2052.2005.01358.x
Subject(s) - quantitative trait locus , biology , family based qtl mapping , epistasis , autosome , genetics , inclusive composite interval mapping , allele , genetic linkage , linkage (software) , trait , gene mapping , gene , chromosome , computer science , programming language
Summary The aim of this study was to investigate chromosomal regions affecting the number of teats in pigs and possible epistatic interactions between the identified quantitative trait loci (QTL). An experimental F 2 cross between Iberian and Chinese Meishan lines was used for this purpose. A genomic scan was conducted with 117 markers covering the 18 porcine autosomes. Linkage analyses were performed by interval mapping using an animal model to estimate QTL and additive polygenic effects. Complementary analyses with models fitting two QTL were also carried out. The results showed three genomewide significant QTL mapping on chromosomes 5, 10 and 12, whose joint action control up to 30% of the phenotypic variance of the trait. Meishan alleles had a positive additive effect on teat number, and a positive‐additive × additive‐epistatic interaction was detected between QTL on chromosomes 10 and 12.