云南元江普通野生稻(Oryza urfipogon Griff)遗传多样性分析及保护策略研究

用SSR方法对云南元江普通野生稻3个自然居群进行30个位点的遗传多样性分析.结果表明,元江普通野生稻具有较高的遗传变异水平(Ap＝2.6,Hs=0.77),且群体遗传分化系数较大,GST为41.08%,即在遗传变异总量中41.08%存在于居群间.本文还通过对云南元江普通野生稻遗传多样性特点的分析,提出了保护策略.

Study of Genetic Diversity and Conservation Strategy of (Oryza rufipogon Griff) in Yuanjiang

Three natural populations of ( O. rufipogon ) in Yuanjiang are distributed at the top of a hill (780 m) and separated about 100 m each other. To investigate the genetic diversity of the populations, 30 SSR primers were used and 77 alleles were detected. The results indicated that the genetic variability of the wild rice in Yuanjiang is relatively high (Ap=2 6, Hs=0 77) and the coefficient of gene differentiation (G ST ) was 41 08%, meaning that the genetic variability among populations was high and all populations should be conserved separately. Moreover, even in the same population, individuals being distributed in different micro environments have different genetic backgrounds. Therefore, random sampling with artificial selection is necessary for ex situ conservation.