Affiliation:
1. Life Science Department, Luoyang Normal University, Luoyang, 471022, China
Abstract
To analyze the genetic diversity of 9 species of Clematis from 31 different populations, we extracted DNA by the improved CTAB method, used ISSR-PCR for amplification, and then selected 9 primers with clear amplified bands from amongst 220 primers. A total of 127 clear bands
were amplified, of which 126 were polymorphic bands, yielding a ratio of 99.2%. The polymorphism information index (PIC) of the primers ranged from 0.9326 to 0.9649. The Nei’s genetic diversity index (H) was 0.2750, the total gene diversity (Ht) was 0.2845, and the genetic differentiation
coefficient (Gst) was 0.6696, indicating high genetic differentiation among populations of Clematis. After cluster analysis, the 31 Clematis populations were divided into 3 categories. Principal coordination analysis (PCoA) of 9 Clematis species then showed that the genetic
relationship between samples of the same Clematis germplasms was closer than that of samples from the same region. The mantel test revealed a significant positive correlation between genetic distance and geographical distance among the populations. The population clustering results
are broadly consistent with the clustering graphs of UPGMA and PCoA. We can conclude the polymorphism of the 9 primers is good, and that the genetic diversity of 31 Clematis populations is rich. Individual Clematis germplasms are closely related and will gather together preferentially.
Publisher
American Scientific Publishers
Subject
Renewable Energy, Sustainability and the Environment,Biomaterials,Bioengineering
Cited by
2 articles.
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