Two major QTL in chromosome 4 of laying hens with the effects on egg traits. M.G. Smaragdov, O.Yu. Barkova and K. V. Plemyashov National Research Institute for Animal Genetics and Breeding, St. Petersburg, Russia

Abstract Text: ABSTRACT: Data were obtained in favor of presence of two major QTL in chromosome 4 of Rhode Island  hens. The SNP2_1 which marked the first QTL was associated with egg weight at 60 weeks of age (P=0.002). The allele effect of C for T nucleotide substitution was 5 g (SD = 3g, P = 0.002). The rs14491030 which marked the second QTL was associated with eggshell weight (P = 0.0032) and eggshell thickness (P = 0.0064). The allele effect of G for A nucleotide substitution was 0.37 g (SD = 0.4, P = 0.001) and 25 mic. (SD = 15 mic, P = 0.01) for eggshell weight and eggshell thickness, respectively. 

Keywords:

chicken

QTL

egg traits