Additional file 3 of Comprehensive identification and expression analysis of B-Box genes in cotton

Table S3. Ka/Ks ratios and duplicate types of gene pairs between the A and D subgenomes of allotetraploid cottons and their corresponding ancestral A and D diploid genomes, respectively. The homologous gene pairs were identified by the results of BLAST and collinearity analysis. When both Ka and Ks were equal to 0, Ka/Ks was considered equal to 1. When only Ks was equal to 0, it was marked as Ka > > Ks. Segmental means that the gene might arise from segmental duplication.