The Wnt signaling pathway plays a critical role in almost all aspects of skeletal development and homeostasis. Many studies suggest the importance of this signaling pathway in connection with bone metabolism through many skeletal disorders caused by mutations in Wnt signaling genes. The knowledge gained through targeting this pathway is of great value for skeletal health and diseases, for example of increased bone mass in the case of osteoporosis. Our objective was to focus on the detection of single nucleotide polymorphisms and investigate the associations between possible polymorphisms in selected genes that are part of those signaling pathways and parameters of bones in hens of ISA Brown hybrids (bone breaking strength, length, width, and bone mass). Different regions of the GPR177, ESR1 and RUNX2 genes were studied, using PCR and sequencing, in a total of forty-eight samples for each marker. Thirteen polymorphisms have been discovered in selected regions of studied genes, whereas these polymorphisms were only within the GPR177 gene. Eight of these polymorphisms were synonymous and five were in the intron. The tested regions of the ESR1 and RUNX2 genes were monomorphic. The only statistically significant difference was found within the GPR177 gene (exon 2) and the bone length parameter, in the c.443 + 86G > A polymorphism. However, this polymorphism was found in the intron, and no other one was found within the selected regions to show associations with the observed bone parameters.

Department of Animal Morphology Physiology and Genetics Mendel University in Brno Faculty of AgriSciences Zemědělská 1 1665 613 00 Brno Czech Republic

Department of Food Technology Mendel University in Brno Faculty of AgriSciences Zemědělská 1 1665 613 00 Brno Czech Republic

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