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A study on population genetic structure ofOryzu meyeriana (Zoll. et Mor. ex Steud.) Baill. from Yunnan and itsin situ conservation significance |
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| Authors: | Lizhi Gao Song Ge Deyuan Hong Jiongwei Zhang Qingyan Luo Guoda Tao Zaifu Xu |
| Institution: | 1. Institute of Crop Germplasm Resources, Chinese Academy of Agricultural Sciences, 100081, Beijing, China 2. Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, 100093, Beijing, China 3. Simao Prefecture Institute of Agricultural Sciences, 665000, Simao, China 4. Xishuangbanna Tropical Botanical Garden, 666100, Mengla, China |
| Abstract: | In order to determine genetic diversity ofOryza meyeriana (Zoll. et Mor. ex Steud.) Baill., 12 enzyme systems encoded by 17 loci were electrophoretically analyzed in 164 individuals of seven populations from Simao Prefecture, Yunnan Province, China. In comparison with those seed plants with the same life history and breeding systems, as well as the other species in the genusOryza, the species shows rather low levels of genetic diversity (A = 1.1,P = 8.0 %, Ho = 0.004 and He = 0.015) within populations and high genetic differentiation among populations. Fst was up to 0. 649, suggesting that 64. 9% of total genetic variability exists among populations. Considering high genetic differentiation among populations from a limited geographic region, most of the populations of the species are worth being protected, and therefore, great natural protection regions should theoretically be established in which a great deal of populations should be involved for developingin situ conservation management. Meanwhile, some priory localities forin situ conservation ofO. meyerzana in Yunnan Province, were proposed. |
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