Whole-Genome Duplication and Purifying Selection Contributes to the Functional Redundancy of Auxin Response Factor (ARF) Genes in Foxtail Millet (Setaria italica L.)

Figure 3

Ks distribution of paralog pairs of SiARFs. (a) Orthologous pairs between S. italica and Oryza sativa and between S. italica and Zea mays, respectively. The -axis represents the Ks values of paralogous or orthologous gene pairs and was divided into different parts in unit of (a) 0.1 or (c) 0.2. (b) The -axis means the frequency of Ks value relative to each unit. Si represents ARF paralogous in S. italica; Si-Os represents ARF orthologous between S. italica and O. sativa; Si represents ARF orthologous between S. italica and Z. mays.

(a)

(b)

(c)