A study on population genetic structure of Oryza meyeriana (Zoll. et Mor. ex Steud.) Baill. from Yunnan and its in situ conservation significance |
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Authors: | GAO Lizhi GE Song HONG Deyuan ZHANG Jiongwei LUO Qingyan TAO Guoda XU Zaifu |
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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 |
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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.
Project supported by the Grant of the President of the Chinese Academy of Sciences. |
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Keywords: | Oryza meyeriana (Zoll et Mor ex Steud ) Baill allozyme analysis Yunnan population genetic structure in situ conservation |
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