Genetic diversity of an endangered aquatic plant, Potamogeton lucens subspecies sinicus |
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Authors: | Koichi Uehara Norio Tanaka Arata Momohara Zhe-Kun Zhou |
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Institution: | 1. Laboratory of Plant Morphology, Faculty of Horticulture, Chiba University, Matsudo, Chiba 271-8510, Japan;2. Tsukuba Botanical Garden, National Science Museum, Amakubo, Tsukuba 305-0005, Japan;3. Laboratory of Forest Ecology, Faculty of Horticulture, Chiba University, Matsudo, Chiba 271-8510, Japan;4. Kunming Institute of Botany, Chinese Academy of Sciences, Heilongtan, 650204 Kunming, PR China |
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Abstract: | The genetic diversity of the species, Potamogeton lucens subsp. sinicus var. teganumensis, which is critically endangered in Japan, was investigated. This species now occurs in only two known localities in Japan. One is a native population (Oitoike population), but the other (Teganuma-Okahotto population) is found in a small artificial pond that was dug in 1998. It is considered that the Teganuma-Okahotto population grew from a soil seed bank. Based on RAPD variation, we compared the genetic diversity of the two populations of P. lucens var. teganumensis in Japan and one population of P. lucens subsp. sinicus var. sinicus in China. The Teganuma-Okahotto population showed RAPD variation, suggesting that it may be derived from more than one seed buried in old sediments. This population also had the highest value of Shannon's Information Index among the three study populations. This finding suggests that seeds buried in sediments can contain genetic variability, and may be used to conserve the genetic diversity of rare and endangered plants. |
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Keywords: | AMOVA P lucens var teganumensis RAPD Soil seed bank Genetic diversity Conservation Endangered species |
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