Fig. 4

Phylogenetic tree of the NAC sequences. The tree was calculated based on NAC domain sequences of cowpea, as well as the representative NAC domains used in the methodology of Zhu et al. (2012) [71]. The tree was generated using RAxML [62] with 100 bootstrap values with the optimal amino acid substitution model automatically chosen in RAxML (i.e., the PROTGAMMAAUTO option). The circles on the branches are bootstrap support values from 50 to 100, with the largest circles representing the greatest bootstrap support