Correlation study of SNP of glycogen degradation metabolism related genes and glycogen content in Haliotis discus hannai

Abstract

Glycogen is an essential nutritional component of the Pacific abalone (Haliotis discus hannai), and its content is a crucial factor in selecting and breeding high-quality abalone. Glycogen catabolism is facilitated by two key enzymes: glycogen debranching enzyme (GDE) and glycogen phosphorylase (GP). This study aimed to explore the relationship between GDE and GP gene polymorphisms and glycogen content in abalone. To this end, four and two SNP loci located in the exonic regions of these two genes, respectively, were screened and identified in 264 abalone using direct sequencing. The results of genetic polymorphism and correlation analysis revealed a negative correlation between the expression of GDE and GP and glycogen content. Moreover, the study found that the GA haplotype of GDE gene SNP1/3 was significantly associated with high glycogen content, while the TT genotype of GP gene SNP2 was significantly associated with low glycogen content. These results provide molecular markers that could be utilized for selecting and breeding glycogen traits in abalone, indicating the potential influence of GDE and GP polymorphisms on glycogen content.