Fig. 4From: Divergence and evolution of cotton bHLH proteins from diploid to allotetraploidFrequency distributions of duplicated pairs in the A- and D-subgenomes based on Ks values. The Ks value of duplicated pairs in the A- and D-subgenomes have similar frequency distributions, and are mainly distributed in Ks = 0.3–0.9. a, the Ks value frequency distribution in A-subgenome; b, the Ks value frequency distribution in D-subgenome Back to article page