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测定了采自安徽省岳西、潜山、和县、合肥、寿县、淮南、阜南、亳州等不同地区的64株辣椒疫霉菌株的交配型,并用10μg/mL的甲霜灵处理A1交配型的菌株HN8和A2交配型的菌株HN3,分别获得抗性突变菌株HN8-Mrt和HN3-Mrt,进一步测定交配型在HN8、HN3及其抗性突变株游动孢子后代中的遗传稳定性。结果发现,供试菌株中A2交配型58株(占90.6%);A1交配型6株(占9.4%),未发现A0、A1A2和A1,A2交配型;A2交配型全省各地均有分布,A1交配型只出现在和县、淮南和阜南3地;HN8-Mrt与HN8、HN3-Mrt与HN3的交配型分别相同,各菌株单游动孢子后代的交配型均与其亲本分别相同。结果说明,辣椒疫霉交配型在安徽的分布呈不均等的态势,其中以A2型占绝对优势;用甲霜灵处理不会诱导辣椒疫霉交配型的变异,交配型在辣椒疫霉的游动孢子后代中能稳定遗传。
64 mating strains of Phytophthora capsici collected in different areas of Yuexi, Qianshan, He County, Hefei, Shouxian, Huainan, Funan and Bozhou of Anhui Province were measured and treated with 10μg / mL of metalaxyl The mating strains HN8 and A2 were used to obtain the resistant strains HN8-Mrt and HN3-Mrt, respectively, to further determine the genetic stability of the mating type in the zoospores of HN8, HN3 and their resistant mutants . The results showed that there were 58 mating strains of A2 (90.6%), 6 mating strains (9.4%) of A1, and no mating type of A0, A1A2, A1 and A2. , And the mating type of A1 only appeared in He County, Huainan and Funan. The mating type of HN8-Mrt and HN8, HN3-Mrt and HN3 were the same. The mating type of single zoospore progeny of each strain was the same as that of their parents. The results showed that the distribution pattern of Phytophthora capsici in Anhui showed an unequal distribution, of which A2 was the absolute predominance. Metalaxyl treatment did not induce the variation of mating type of Phytophthora capsici, In the progeny of zoospores can be stable genetic.