In order to develop the cotton NAC gene resource,in this study,138 NAC transcription factor family genes were identified from Gossypium arboretum L. by bioinformatics method,which were named as Ga NAC001-Ga NAC138 based on their chromosomal locations,respctively.According to the similarity of the amino acid sequences and the phylogenetic tree analysis,all the Ga NAC genes were clustered into 11 distinct subfamilies.Genes structure analysis indicated that most of Ga NAC(62.4%)genes contained two introns.Homo...