Fig. 4

Chromosome location, gene replication, and collinear correlation. a Location information of VvRCHCs on grapevine chromosomes. Colored boxes and line connections represent the segmental repetitive gene pairs. b Collinear correlations of RCHCs in grapevine, tomato, and Arabidopsis. Each colored square is a chromosome (serial number). The black-and-white square shows the density of genes in each chromosome. Each line connects homologous genes; colored lines correspond to RCHCs, while gray lines denote other genes