title: Mapping QTL for fat area ratios and serum leptin concentrations in a Duroc purebred population.
abstract: The reduction of extra subcutaneous, intermuscular and abdominal fat is important to increase the carcass lean percentage of pigs. Image analyses of fat area ratios were effective for estimation of separated fat in pig carcasses. Serum concentrations of leptin are useful as physiological predictors of fat accumulation in pigs. The objectives of the present study were to perform a quantitative trait locus (QTL) analysis for fat area ratios and serum leptin concentrations in a Duroc purebred population. Pigs (n = 226 to 538) were measured for fat area ratios of carcass cross-sections at the fifth to sixth thoracic vertebrae, half body length and last thoracic vertebra using an image analysis system, and serum leptin concentration. In total, animals were genotyped for 129 markers and used for QTL analysis. For fat area ratios, four significant and 12 suggestive QTLs were detected on chromosomes 1, 6, 7, 8, 9, 12 and 13. Significant QTLs were detected on the same region of chromosome 6, which was located near a leptin receptor gene. For serum leptin concentrations, two significant and two suggestive QTLs were detected on chromosomes 6, 9, and 16, and the QTLs on chromosome 6 were also in the same region for fat area ratios.
authors.affiliation: National Livestock Breeding Center, Nishigo, Fukushima Graduate School of Agricultural Science, Tohoku University, Sendai Miyagi Prefecture Animal Industry Experiment Station, Ohsaki, Miyagi, Japan. y0uemoto@nlbc.go.jp
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Uemoto
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Soma
authors.forename: Shuji
authors.initials: S
authors.lastname: Sato
authors.forename: Tomoya
authors.initials: T
authors.lastname: Shibata
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kadowaki
authors.forename: Kazuo
authors.initials: K
authors.lastname: Katoh
authors.forename: Eiji
authors.initials: E
authors.lastname: Kobayashi
authors.forename: Keiichi
authors.initials: K
authors.lastname: Suzuki
mesh_terms: D000273:Adipose Tissue / Q000033:anatomy & histology*; D000818:Animals; D002874:Chromosome Mapping; D005838:Genotype; D020738:Leptin / Q000097:blood*; D040641:Quantitative Trait Loci; D013552:Swine / Q000033:anatomy & histology* / Q000097:blood* / Q000235:genetics
chemical_list: D020738:Leptin