title: Identification of single nucleotide polymorphisms of the signal transducer and activator of transcription 3 gene (STAT3) associated with body measurement and carcass quality traits in beef cattle.
abstract: Previous studies have shown that the signal transducer and activator of transcription 3 gene (STAT3) is involved in lipid storage and energy metabolism, suggesting that STAT3 is a potential candidate gene that affects body measurement and carcass quality traits in animals. Therefore, the aim of this study was to identify polymorphisms in bovine STAT3 and to analyze their possible associations with body measurement and carcass quality traits in 493 individuals of 2 native Chinese cattle breeds: Qinchuan (N = 371) and Jiaxian cattle (N = 122). DNA sequencing and polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) were employed to detect STAT3 single nucleotide polymorphisms (SNPs). We found 5 SNPs: 1 in an exon (g.65812G>A: exon 16) and 4 in introns (g.43591G>A: 13 intron, g.67492T>G: 19 intron, g.67519T>C: 19 intron, and g.68964G>A: 20 intron). Both g.65812G>A and g.68964G>A were not in Hardy- Weinberg equilibrium (HWE), whereas individual frequencies of each genotype were consistent with HWE for other SNPs in Qinchuan cattle populations. For the Jiaxian cattle, the genotype distributions of the 4 mutations were in HWE except for g.67519T>C. The results indicate that these SNPs have a significant association with some body measurements and carcass quality traits (P < 0.05 or P < 0.01). Therefore, STAT3 might have potential effects on production traits in beef cattle populations and could be used for marker-assisted selection.
authors.affiliation: College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China.
authors.forename: N
authors.initials: N
authors.lastname: Song
authors.affiliation: College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China.
authors.forename: L S
authors.initials: LS
authors.lastname: Gui
authors.affiliation: College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China.
authors.forename: H C
authors.initials: HC
authors.lastname: Xu
authors.affiliation: College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China.
authors.forename: S
authors.initials: S
authors.lastname: Wu
authors.affiliation: College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China.
authors.forename: L S
authors.initials: LS
authors.lastname: Zan
mesh_terms: D000818:Animals; D049628:Body Size / Q000235:genetics; D001947:Breeding; D002417:Cattle / Q000235:genetics / Q000254:growth & development; D063427:Food Quality; D005787:Gene Frequency; D056726:Genetic Association Studies; D005819:Genetic Markers; D008460:Meat / Q000592:standards*; D020641:Polymorphism, Single Nucleotide; D050796:STAT3 Transcription Factor / Q000235:genetics*; D012641:Selection, Genetic; D017422:Sequence Analysis, DNA
chemical_list: D005819:Genetic Markers; D050796:STAT3 Transcription Factor