This study aims to explore the functions and mechanisms of testicular descent in , and analyze the changes in genes and metabolite levels in this process. Illumina NovaSeq and liquid chromatography-mass spectrometry were used for the transcriptomic analysis and metabolomic analysis, respectively, of the normal and descending testis of . . Gene ontology (GO) enrichment of the transcriptomic results revealed 240 differentially expressed genes (DEGs), such as , , , and . Kyoto encyclopedia of genes and genomes (KEGG) enrichment showed 52 DEGs, including , , , and . The qRT-PCR results were consistent with the transcriptomic results in terms of the expression patterns of six randomly selected genes in the normal and descending testis. The metabolomic results revealed 28 differential metabolites associated with the testicular function, including 3-dehydroquinic acid, α-linolenic acid, dihydroxyacetone phosphate, and fructose 1,6-bisphosphate. The conjoint analysis showcased that glycerophospholipid metabolism, α-linolenic acid metabolism, and arachidonic acid metabolism may be the key metabolic pathways regulating testicular descent in . . This study will help to understand the mechanism of testicular descent and lay a theoretical foundation for exploring the mechanisms of the population changes of . and developing laboratory animal resources.
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