Fig. 4From: Systematic analysis and expression of Gossypium 2ODD superfamily highlight the roles of GhLDOXs responding to alkali and other abiotic stress in cottonSelection pressure based on non-synonymous to synonymous ratio (Ka/Ks) for 2ODDs. A The density of duplicated gene pairs in various ranges of Ka/Ks. Different colors mean different combinations of gene pairs among four Gossypium species. B Prediction of a number of duplicated gene pairs of different combinations from four Gossypium species. The blue, orange and grey colors show the different selection pressureBack to article page