Fig. 1: Genetic diversity and phenotypes of watermelon accessions for T2T or gap-free assembly.
From: Telomere-to-telomere Citrullus super-pangenome provides direction for watermelon breeding
a–c, The highly diverse fruit/seed phenotypes of seven watermelon species and interspecific hybrids—C. naudinianus: 1 PI 596694; C. colocynthis: 2–5 PI 525081, PI 632755, PI 652554 and PI 537300; C. rehmii: 6 PI 670011; C. ecirrhosus: 7 PI 673135; C. amarus: 8–12 PI 482276, PI 296341-FR, PI 271769, PI 189225 and RCAT 055816; C. mucosospermus: 13–14 PI 532732 and PI 595203; C. lanatus landrace: 15–20 PI 254622, HeiShanRen, PI 381740, DaBanHongZiGua, PI 288522 and SanBaiGua; C. lanatus cultivar: 21–27 ShiHong No. 2, Sugarlee, Charleston Gray, Calhoun Gray, Allsugar, G42 and PKR6. The 28–31 interspecific hybrids of C. lanatus cultivar and C. colocynthis; 32–34 interspecific hybrids of C. lanatus cultivar, C. ecirrhosus and C. mucosospermus. Scale bar corresponds to 1 cm. a, Whole fruit; b, longitudinal section of fruit; c, seeds. d, Neighbor-joining phylogenetic tree of 429 accessions inferred from genome-wide SNPs. The colors of branches in the tree indicate different species—C. lanatus (teal), C. mucosospermus (purple), C. amarus (light blue), C. rehmii (red), C. ecirrhosus (green), C. colocynthis (dark blue) and C. naudinianus (orange). In Figures 2c,d, 3a,b and 4b and Supplementary Figures 1a–c, 2, 3, 6a, 8a, 10, 11, 13, 14 and 15, consistent color coding has been adopted to represent the species of the accessions. The 27 accessions used for de novo assembly are indicated with stars in the phylogenetic tree. e, Types and percentages of different TE families detected in the seven groups genome. f, A neighbor-joining phylogenetic tree was constructed using the top eight monomers from each of the 26 watermelon accessions. Colors of branches in the tree indicate different groups. Clusters 1–4 represent similar monomers.
