The interaction network of lncRNA–mRNA, mRNA–mRNA in ESCs vs. PGCs. (A) The interaction relationship between candidate differentially expressed lncRNAs (DELs) and target genes (lncRNA–mRNA) in ESCs vs. PGCs. Circular nodes and triangular nodes represent target genes and DELs, respectively. Regular triangles and inverted triangles represent up-regulated and down-regulated DELs, respectively. The depth of the triangle color indicates the number of target genes. The darker the triangle color is, the more target genes the DEL has. (B) The interaction relationship of target genes of candidate DELs. Circular nodes represent target genes of DELs. The depth of the color indicates the weight of the target gene in the network. The darker the color is, the higher the weight of the target gene, indicating the target gene has stronger connections with neighboring genes.