Biotechnology Bulletin ›› 2013, Vol. 0 ›› Issue (7): 107-113.

• Study Report • Previous Articles     Next Articles

Genetic Diversity of Different Geographical Populations of Simulium quinquestriatum Based on ISSR Analysis

Xiu Jiangfan, Zhang Chunlin, Chen Hanbin   

  1. (Department of Biology,Guiyang Medical College,Guiyang 550004)
  • Received:2013-01-15 Revised:2013-07-19 Online:2013-07-19 Published:2013-09-02

Abstract: In this paper, the genetic diversity of geographical populations of S. quinquestriatum from China was investigated with ISSR method using eight selective primers in order to clarify thegenetic diversity of eight different geographic populations of S. quinquestriatum. Establishment of ISSR fingerprint of S. quinquestriatum from eight populations of 160 individuals in this study. The results showed that total 111 bands were generated, of which 96 bands were polymorphic bands(the percentage of polymorphic band, P= 86.47%). The characteristic ISSR pattern for each individual was detected. S. quinquestriatum displayed the higher degree of genetic diversity at the species level(P=86.4%, A=1.991 0±0.094 9, A E=1.553 2±0.334 5, H=0.323 1±0.157 9, I=0.484 7±0.203 7)than the population level(P=78.37%, A=1.492 1±0.499 7, A E=1.316 6±0.370 0, H=0.180 1±0.206 6, I=0.265 5±0.295 0). Results of AMOVA analysis demonstrated that the among-population component had a high degree which accounted for 59% of the total genetic differentiation;while the within-population component accounted for 41%. The gene flow that among-population is 0.347 5. It is indicated that the main factors for the high degree of genetic differentiation among different geographic populations of S. quinquestriatum are geographic barrier(mountains and plains)and habitat fragmentation.

Key words: Simulium quinquestriatum, Populations ISSR, Genetic diversity, Genetic differentiation