| 江西省辣椒疫霉病菌的交配型及对霜脲氰敏感性的测定 |
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| 引用本文： | 张海良,马辉刚,何烈干,李湘民,蒋军喜.江西省辣椒疫霉病菌的交配型及对霜脲氰敏感性的测定[J].植物病理学报,2013,43(2):196-200. |
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| 作者姓名： | 张海良 马辉刚 何烈干 李湘民 蒋军喜 |
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| 作者单位： | 1、 江西省农科院植物保护研究所,南昌 330200; 2、 江西农业大学农学院,南昌 330045 |
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| 基金项目： | 国家公益性行业（农业）科研专项(201003004);江西省科技支撑重点项目（2010BNA04900）;江西省农科院科技创新及成果转化基金项目 |
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| 摘 要： | 由辣椒疫霉病菌Phytophthora capsici引起的辣椒疫病是辣椒生产上一种重要病害,在我国各地均有发生.辣椒疫霉是一种异宗配合的卵菌.异宗配合的疫霉菌的不同交配型菌株成对培养时,可以形成有性器官并发生基因重组,使该种病菌获得更强的生存能力、致病力和更广泛的寄主范围.因此,研究疫霉交配型在理论和实践上均具有重要意义.霜脲氰(cymoxanil)由美国杜邦公司开发,用于卵菌纲病害的防治.自投入市场使用,至今未发现在自然条件下关于疫霉菌对霜脲氰抗药性报道.
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| 收稿时间： | 2012-06-18; |
Mating type and sensitivity of Phytophthora capsici to cymoxanil in Jiangxi Pro-vince |
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| ZHANG Hai-liang
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MA Hui-gang
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HE Lie-gan
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LI Xiang-min
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HANG Jun-xi.Mating type and sensitivity of Phytophthora capsici to cymoxanil in Jiangxi Pro-vince[J].Acta Phytopathologica Sinica,2013,43(2):196-200. |
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| Authors: | ZHANG Hai-liang MA Hui-gang HE Lie-gan LI Xiang-min HANG Jun-xi |
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| Institution: | 1.Plant Protection Institute, Jiangxi Academy of Agricultural Sciences,Nanchang 330200,China; 2.College of Agronomy,JAU,Nanchang 330045,China |
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| Abstract: | Mating types of 108 Phytophthora capsici isolates collected from Jiangxi Province were tested. The results showed that no oospore was produced while the isolates were cultured with A2 isolate, but oospores were observed while the isolates were cultured with A1 isolate. It indicated that P.capsici population from Jiangxi was composed of A2 mating type. The sensitivity to cymoxanil of 108 Phytophthora capsici isolates collected from different areas of Jiangxi were determined by mycelia growth inhibition method. The result showed that EC50 values ranged from 1.227 6 to 33.260 8 μg/mL, with an overall mean of 12.991 0±0.691 4 μg/mL, and EC50 of the most insensitive isolate was 27.09 times of that of the most sensitive isolate. There existed great sensitivity differenc to cymoxanil between isolates from different regions.The isolates from Jian county had the lowest ave-rage EC50 value 17.873 2 μg/mL, and the highest average EC50 value 6.693 4 μg/mL was from Jiujiang. There also existed great sensitivity differenc to cymoxanil between isolates in the same regions. EC50 of the most insensitive isolate was 8.46 times of that of the most sensitive isolate from Gaoan. |
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| Keywords: | Phytophthora capsici Phytophthora capsici cymoxanil resistance mating type |
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