[Comparison of complete chloroplast genome sequences of Amygdalus pedunculata Pall.].

Amygdalus pedunculata Pall. is one of the 12 important woody oil crops in China. In this study, we determined the complete chloroplast genome sequence of A. pedunculata Pall. (MG602257) from Mu Us desert in Yulin city, Shaanxi province, China. The plastome was 157 851 bp with 36.8% GC content. Comparisons among the plastomes of MG602257 and other two MG869261 and KY101153 from Genebank of NCBI showed that the total length of these chloroplast genomes was MG602257< MG869261<KY101153, the GC contents of these genomes were same, and 149 mutation events including 93 substitutions and 56 indels were accurately located. The codon numbers and RSCU values among the three were similar. They shared the same genes at the four boundaries of the LSC, SSC, IRa, and IRb regions. The lengths of ndhF at the LSC/IRa boundary in MG602257 and MG869261 were same while adjusting 9 bp in KY101153. The length of ycf1 gene at the SSC/IRb boundary in MG602257, MG869261 and KY101153 was 5 657, 5 588 and 5 684 bp, respectively, which was the one of the reasons for the size difference among the three plastomes. Phylogenetic analyses based on 13 complete plastomes of Rosaceae species confirmed close relationships between A. trilob and A. pedunculata.