[Genome-wide identification of the gene family in the silkworm () and their expression analysis in diapause eggs and nondiapause eggs].

The aldo-keto reductase super family (AKRs) has a wide range of substrate specificity. However, the systematic identification of insect gene family members has not been reported. In this study, bioinformatics methods were used to predict the phylogenetic evolution, physical and chemical properties, chromosome location, conserved motifs, and gene structure of family members in (). Transcriptome data or quantitative real time polymerase chain reaction (qRT-PCR) were used to analyze the expression level of genes during different organizational periods and silkworm eggs in different developmental states. Moreover, Western blotting was used to detect the expression level of the BmAKR in silkworm eggs. The results showed that 11 genes were identified. These genes were distributed on 4 chromosomes of the silkworm genome, all of which had the (α/β) 8-barrel motif, and their physical and chemical characteristics were relatively similar. Phylogenetic analysis showed that the genes could be divided into 2 subgroups ( and ). Transcriptome data analysis showed that the expression of genes were quite different in different tissues and periods. Moreover, the expression analysis of genes in silkworm eggs showed that some genes were expressed significantly higher in nondiapause eggs than in diapause eggs; but another gene, , was expressed significantly higher in diapause eggs than in nondiapause eggs. The detection of protein level found that the difference trend of BmAKR1-1 in diapause eggs and non-diapause eggs was consistent with the results of qRT-PCR. In conclusion, was screened out as candidates through the identification and analysis of the genes in silkworm, which may regulate silkworm egg development is worthy of further investigation.