稻瘟病菌生理小种多变性及稳定化选择的重要性

The variety of physiologic race of Magnaporthe grisea and the importance of stabilizing selection

扼要综述了水稻稻瘟病菌Magnaporthegrisea的多变性及稻瘟病菌的致病性变异途径:突变、准性生殖、异核现象和有性杂交。另外,特别强调了寄主稳定化选择对维持自然界病菌群体相对稳定的重要性。并针对稻瘟病菌变异频率高低的两种对立观点及水稻抗稻瘟病育种提出了看法和建议。

This paper introduced briefly the variety of Magnaporthe grisea and the mechanism of possible pathogenic variability:mutation, paraseuality, heterocatyosis and sexual hybridization.In addition,the paper laid emphasis on stabilizing selection, by it the hosts could keep the pathgen stable.In the end,this paper introduced the opposite view-points on the variability of Pyricularia grizea . And some suggestions were proposed to rice breeding work.