Biotechnology Bulletin ›› 2018, Vol. 34 ›› Issue (11): 127-135.doi: 10.13560/j.cnki.biotech.bull.1985.2018-0717

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Sequencing and Analyzing Mitochondrial Genome of Cacopsylla coccinea

JIN Qiao, LIU Xia, GAN Zhi-Kai   

  1. Energy and Environment Engineering Institute,Nanchang Institute of Technology,Nanchang 310000
  • Received:2018-08-12 Online:2018-11-26 Published:2018-11-28

Abstract: In order to protect the medicinal plant resources such as Cacopsylla and to discover its biological properties,physiological and biochemical characteristics,we chosen Cacopsylla coccinea as the research object,conducted the determination of its mitochondrial(mt)genome,and analyzed its sequence characteristics. With the technology of PCR and gene cloning,the present study proved that the complete mitochondrial genome(MG)of C. coccineae was 14 832 bp of a full length. It encoded 37 genes,including 13 protein-encoding genes,22 transferred RNA genes,2 ribosomal RNA genes,and 1 non-coding region with high AT content. Using 3 insects of C. coccineae,Paratrioza sinica and Pachypsylla venusta as study material,we analyzed the molecular composition features of Psyllidae mitochondrial genome with comparative genomics and bioinformatics,and the results were as follows:(1)the sizes of MG from 3 insects were similar;(2)trnV gene in C. coccineae rearranged while compared with the other 2;(3)the interval in P. venusta was the longest,and the overlap area in P. sinica was the largest;(4)AT contents in 3 insects were similar,with about 70%;(5)Base mismatch in 3 insects existed,with the highest AT content of 3rd -site codon in H-strand and L-strand;and (6)the base substitution rate of nad 5,nad6 and cob genes in MG was < 1,indicating that they were under negative selection.

Key words: Cacopsylla coccinea, mitochondrial genome, sequence analysis