BUSCADOR RECOLECTA

Digital.CSIC. Repositorio Institucional del CSIC

oai:digital.csic.es:10261/369122

(a, b) A schematic representation of chromosome evolution in deuterostome lineages. The chromosomal architectures of presumed LCAs (bottom in a and left in b) and the chromosomal architectures of living deuterostome species (top in a and right in b). Each box denotes an individual chromosome. Haploid number (1N) and increase (+) or decrease (-) in quantity of chromosomes are indicated. The color code of boxes is taken from the previous study on vertebrate ancestral chromosomes, except for the 9 one-to-one corresponding chromosomes (a, light gray boxes). Chromosomal architecture of the LCA of vertebrates was based on the previous study [20]. In cases where chromosomal fusion events were deduced, types of changes are indicated below color boxes with symbols defined previously [19]; end-end translocation (●), centric insertion (↘), and fusion-with-mixing (⊗). Box sizes do not reflect the actual sizes of chromosomes. (c) Chromosomal positions of the orthologous gene pairs among 5 deuterostome species. Horizontal bars with numbers on top represent chromosomes of each species. In total, 3,668 orthologous gene pairs are illustrated. For ease of comparison, the chromosome sizes are scaled proportionally such that the 5 genome assemblies reach equal sizes. Except for the genes that spread into multiple chromosomes in amphioxus (BFL), gene pairs that are not located on the corresponding chromosomal pairs or cannot be found in all 5 species are not shown. The data underlying this figure can be found in S1 Data. BFL, Branchiostoma floridae; LCA, last common ancestor., Peer reviewed