{"refrec":{"BRefID":112132,"RR":"<b>Uehara, K.; Tanaka, N.; Momohara, A.; Zhou, Z.-K.</b> (2006). Genetic diversity of an endangered aquatic plant, <i>Potamogeton lucens</i> subspecies <i>sinicus</i>. <i>Aquat. Bot. 85(4)</i>: 350-354. <a href=\"https://dx.doi.org/10.1016/j.aquabot.2006.06.008\" target=\"_blank\">https://dx.doi.org/10.1016/j.aquabot.2006.06.008</a>","BEntID":106722,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Aquat. Bot. 85(4)</i>: 350-354. <a href=\"https://dx.doi.org/10.1016/j.aquabot.2006.06.008\" target=\"_blank\">https://dx.doi.org/10.1016/j.aquabot.2006.06.008</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":1,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Uehara, K.; Tanaka, N.; Momohara, A.; Zhou, Z.-K.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Uehara, K. <i>et al.</i>","Englishabstract":"The genetic diversity of the species, <i>Potamogeton lucens</i> subsp. <i>sinicus</i> var. <i>teganumensis</i>, 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 <i>P. lucens</i> var. <i>teganumensis </i>in Japan and one population of <i>P. lucens</i> subsp. <i>sinicus</i> var. <i>sinicus</i> 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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