Fig. 2From: Comprehensive analysis of NAC transcription factors uncovers their roles during fiber development and stress response in cottonEvolutionary analysis of NAC proteins in cotton. a Statistical analysis of exon numbers of NAC genes in G. hirsutum. b The ratio of non-synonymous to synonymous substitutions (dN/dS) of NAC genes in inter-genomic (At Dt) and intra-genomic (A2 At and D5 Dt). c The SNP density of GhNAC genes in Upland cotton populations. The gene body, 2Â kb upstream and 2Â kb downstream sequences of each GhNAC gene were selected for analysisBack to article page