title: Evaluation of the IGFs (IGF1 and IGF2) genes as candidates for growth, body measurement, carcass, and reproduction traits in Beijing You and Silkie chickens.
abstract: Insulin-like growth factors are crucial in cellular growth, differentiation, and reproduction by mediating many of the actions of growth hormone in chickens. To determine whether insulin-like growth factors genes (IGFs) are associated with important economic traits in chicken or not, we herein analyzed the association between two single nucleotide polymorphisms (SNPs) within IGF1 and IGF2 and twenty-seven growth, body measurement, carcass, and reproduction traits in two Chinese native breeds, i.e., Beijing You and Silkies. With marker-trait association analysis, we found that SNP IGF1-PstI, within the 5' flanking region of IGF1, was significantly associated with body weight at 8 (BW8), 10 (BW10), and 13 (BW13) wk of age; and shank length (SL13) and shank circumference (SC13) at 13 wk of age in Silkie population (P < 0.05). The SNP IGF2-MspI within the exon2 of IGF2 showed a significant association with body weight (BW17) and carcass weight (CW17) at 17 wk of age in Beijing You population (P < 0.05). Our findings implied that the SNPs within IGF1 and IGF2 genes could be in linkage disequilibrium with the actual causative mutations that affect growth and carcass traits.
authors.affiliation: Department of Animal Genetics and Breeding, College of Animal Science and Technology, Key Laboratory of Animal Genetics and Breeding of Ministry of Agriculture, China Agricultural University, Beijing, China.
authors.forename: Shaoqing
authors.initials: S
authors.lastname: Tang
authors.forename: Dongxiao
authors.initials: D
authors.lastname: Sun
authors.forename: Jiangtao
authors.initials: J
authors.lastname: Ou
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Guiyun
authors.initials: G
authors.lastname: Xu
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000818:Animals; D001823:Body Composition / Q000235:genetics*; D001835:Body Weight / Q000235:genetics; D002645:Chickens / Q000235:genetics* / Q000502:physiology*; D005260:Female; D005786:Gene Expression Regulation / Q000502:physiology*; D015810:Linkage Disequilibrium; D008297:Male; D011110:Polymorphism, Genetic; D012098:Reproduction / Q000235:genetics*; D013002:Somatomedins / Q000235:genetics* / Q000378:metabolism
chemical_list: D013002:Somatomedins