Gene duplication type classification analysis, using DupGen_finder, can divide all genes into 5 categories according to the replication type, namely WGD: whole genome duplication, TD: tandem duplication (two adjacent duplication genes), PD: Proximal duplications (repeated genes within 10 genes apart), TRD: transposed duplications (duplicated genes consisting of ancestral and new loci), DSD: scattered duplications (duplicated genes that are neither adjacent nor collinear).