[Study on Genetic Diversity of Twelve Natural Zanthoxylum dissitum Populations]

The genetic diversity of twelve natural Zanthoxylum dissitum populations, which is a species of Chinese herbal medicines to four provinces of southwest China, has been investigated.

By inter-simple sequence repeat markers (ISSR), the eight primers, which could amplify stable, clear and highly polymorphic bands, were screened from 100 candidate primers.

150 total ISSR discernible bands and 147 polymorphic were amplified by the eight checked primers. On one hand, the percentage of polymorphic bands was 98.0%, on the other hand, the population level the percent of polymorphic bands ranged from 26.0% to 62.0%. The Shannon's information index within species (Hsp) was 0.4175, while the values within population (Hpop) were ranged from 0.1328 to 0.3267. Analysis of molecular variance (ANOVA) revealed that the population genetic variation accounted for 47.98% but the intraspecific variation for 52.02%.

The high level of genetic diversity exists not only in population but also in species. A high degree of genetic differentiation populations is approved to exist in Zanthoxylum dissitum. These results lay a theoretical foundation for genetic diversity analysis of Zanthoxylum dissitum.