Effect of spliceosome gene complex underlying the transition between the laying and brooding phases in pituitary transcriptome profile of breeder turkey

The spliceosome is a large ribonucleoprotein complex that guides pre-mRNA splicing in eukaryotic cells. In this research, pituitary transcriptome profile of commercial breeder turkey of BUT breed was studied during the laying and broodiness phases. A total of 334 differentially expressed genes during egg-laying phases and brooding phases were identified. There were 229 upregulated and 104 downregulated at egg-laying phases compared with brooding phases. In the present study results of both GO and KEGG analysis suggested that the genes in the spliceosome complex are critical in the transition from the egg-laying to brooding phase turkeys. In addition, in the calcium ion transport in the biological process, splicing activates and creates various isoforms of the calcium/calmodulin alpha, which plays an important role in the neurotransmitter and hormonal systems of turkeys. In this study it was revealed that SNRPD1, SNRPF and SNRPA1/U2A in spliceosome complex were essential for folliculogenesis and fertility. HSPA8 wassignificantly down-regulated at laying turkeys compared with broodiness turkeys was involved in autophagy and follicular regression in broody turkey.