EST-SSR analysis of genetic diversity of Psammosilene tunicoides in Yunnan- Guizhou provincial region / 中草药

ABSTRACT

Objective To analyze the genetic diversity and variation of Psammosilene tunicoides in Yunnan-Guizhou provincial region. Methods The genetic diversity of different populations of P. tunicoides with high polymorphism was analyzed by using EST-SSR primers developed from transcriptomic sequencing technique. Results A total of 17 530 SSR-containing EST sequences were obtained by transcriptomic sequencing, 14 pairs of polymorphism EST-SSR primers were used to analyze the genetic diversity of 17 populations of P. tunicoides in Yunnan-Guizhou region, the results showed that the P. tunicoides in different populations had a high level of genetic diversity with the polymorphic information content (PIC) in the range from 0.350 0 to 0.795 0 in locus level; and had a lower value in group level with percentage of polymorphic bands (PPB) of 64.29%-100%. And the range of Nei’s genetic similarity coefficient was from 0.188 2 to 0.477 7 with mean value of 0.323 2. The gene flow in P. tunicoides in Yunnan-Guizhou region was small with Nm mean value of 0.302 0, and there is a large genetic differentiation between groups with Fst mean value of 0.452 9. Conclusion Transcriptomic sequencing enriched P. tunicoides EST database. The genetic diversity of P. tunicoides might be related to the long evolutionary history of reproductive pattern and distribution area. And there was a highly genetic diversity among the populations of P. tunicoides in Yunnan-Guizhou region, it might be that the geographic barrier cut off the genes exchange among different populations.