1. Dot plot of local homologous genes between Solanaceae species genomes. The figure shows a local homologous gene spot map of five Solanaceae species, such as pepper with the tomato genome as a reference, with rectangular frames of different colors indicating the relatively independent and complete corresponding collinearity fragments; A1–A23 represent the common ancestral chromosomes of these species.
2. Chromosome karyotype reconstruction and evolution in Solanaceae species. (a). The five-pointed star represents the WGT event, and the circle represents the WGD event. The chromosome karyotype of the key nodes and the number of chromosomes of each species are indicated in the diagram, and the name of each species is given as its Latin name. (b). The process of Solanaceae ancestral chromosome formation. A1–A7, B1–B7, and C1–C7 represent the ancestors of the core-eudicot species after the WGT event. S1–S15 represent the ancestral chromosomes of Solanaceae, and 'lost' represents the loss of the resulting B chromosome.
