Genetic diversity among geographically separated populations of Nepenthes mirabilis |
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Authors: | Arunrat Chaveerach Alongkod Tanomtong Runglawan Sudmoon Tawatchai Tanee |
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Institution: | (1) Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand;(2) Department of Biochemistry, Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand |
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Abstract: | The distribution of Nepenthes mirabilis ranges from Northeast (NE) to South (S) Thailand. Eleven individuals from NE, S and Suen Jatujak market in Bangkok, Central
(C) Thailand, were collected and divided into four populations according to their geographical areas. These four populations
were analyzed to determine a genetic diversity profile using thirteen inter-simple sequence repeat markers. The individuals
produced 75.18% polymorphic banding profiles. The Shannon’s index was used to estimate genetic diversity. Total genetic diversity
(H
T) and inter-population genetic diversity (H
S) were 0.854 and 0.678, respectively. The degree of genetic differentiation (G
ST) of the species populations is 0.206, whereas the gene flow (Nm) among all the various geographical area populations is 1.016. Both the dendrogram and the results of the Shannon’s diversity
index suggest great genetic diversity. These results support the broad range of distribution sites of Nepenthes mirabilis, which would require high genetic diversity to adapt to the environmental variations that can be found between NE, C, and
S Thailand. ANOVA shows that the genetic diversity in each population is not significantly different (P > 0.05). Mantel tests reveal that geographical distance is an important factor for affecting the genetic distances among
populations. |
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Keywords: | genetic diversity ISSR analysis Nepenthes mirabilis Shannon’ s index |
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