求翻译：６．１稻瘟病菌繁殖方式对群体遗传多样性的影响稻瘟病菌一般以无性繁殖为主，很难发现稻瘟病菌的有性世代，因此无性繁殖对稻瘟病菌群体遗传结构的影响要明显高于有性繁殖。ｃｌ“ｄｉａ等¨４１通过ＭＧＲ５８６探针对稻瘟病菌进行ＤＮＡ指纹分析，发现群体遗传结构主要由无性宗谱组成，而有性杂交对稻瘟病菌致病性的变异并不重要。Ｋｗａｎ纠ｏｎ研究认为““，无性繁殖是导致美国、欧洲、哥伦比皿等地稻瘟病菌群体结构单一的主要原因。我们认为，尽管有性繁殖对稻瘟病菌群体遗传结构的影响较小，但是有性杂交导致稻瘟病菌的遗传变异肯定是稻瘟病菌遗传多样性的一种潜在的原因。是什么意思？

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6.1 rice blast fungus reproduction way to the community heredity multiple influence rice blast fungus generally by the vegetative reproduction primarily, very difficult to discover the rice blast fungus the sexual generation, therefore the vegetative reproduction must be higher than the sexual repro

6. 1 effects of Magnaporthe grisea reproduction on population genetic diversity of Magnaporthe grisea generally dominated by asexual reproduction, it is difficult to find sexual generation of the rice blast fungus, therefore vegetative propagation effects on population genetic structure of Magnaport