The complete chloroplast genome of the genus Azadirachta

Abstract

Azadirachta consists of 2 species and 1 variety indigenous to the tropical areas of the Indo-Malayan region. They are evergreen trees for multi-purpose utilization featured by containing azadirachtin. The complete chloroplast (cp) genome of Azadirachta indica, A. indica var. siamensis and Azadirachta excelsa were reported in this study, which was 160,876 bp, 160,477 bp, and 160,361 bp in length respectively. The whole cp genomes encode 131 genes (37 tRNA genes, 8 rRNA genes, and 86 protein-coding genes) in both A. indica and A. excelsa, while A. indica var. siamensis do not have the rrn4.5S gene in the inverted repeat regions. The phylogenetic analysis indicated that A. indica var. siamensis and A. exselsa were closely related and A. indica was separated from these two species, which suggested that A. siamensis could be a species rather than a variety.

Keywords

• chloroplast genome
• azadirachta indica
• azadirachta indica var. siamensis
• azadirachta excelsa
• meliaceae