The aim of the current study was to investigate the association of G4533815A SNP in STAT5B and A287G SNP in
BMPR-IB genes with growth and reproduction related traits in chicken. A sample of 205 individuals from breeding station of
Mazandaran native chicken population was selected randomly. All of the individuals were genotyped for both SNPs using
PCR-RFLP technique. Marker-trait association analyses were performed using estimated breeding value of the traits as
dependent variable in GLM procedure of SAS 9.1. Results suggested that breeding value least square means for genotypes
of G4533815A SNP is significantly differed from each other for traits of body weight at 8 and 12 weeks (P<0.01). In the case of
BMPR-IB gene, no significant difference was found. In conclusion, STAT5B gene may be associated with body growth in
chicken and may be considered in Marker Assisted Selection program to improve chicken growth performance
