| 张世才1#, 李怡斐1#, 王春萍2, 杨小苗1, 段敏杰1, 黄任中1, 黄启中1*.重庆地区辣椒疫霉交配型分布及对烯酰吗啉的敏感性现状[J].植物保护,2022,48(2):173-176. |
| 重庆地区辣椒疫霉交配型分布及对烯酰吗啉的敏感性现状 |
| Distribution of mating types of Phytophthora capsici and its sensitivity to dimethomorph in Chongqing |
| 投稿时间：2021-05-14 修订日期：2021-08-09 |
| DOI：10.16688/j.zwbh.2021295 |
| 中文关键词: 辣椒疫霉 交配型 烯酰吗啉 敏感性 |
| 英文关键词:Phytophthora capsici mating type dimethomorph sensitivity |
| 基金项目:国家现代农业产业技术体系建设资金项目(CARS-23-G34); 重庆市技术创新与应用发展专项(cstc2021jscx-cylhX0002); 重庆市农业科学院绩效激励引导专项(cqaas2021jxjl22); 重庆市技术创新与应用发展专项面上项目(cstc2020jscx-msxmX0054) |
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| 中文摘要: |
| 为明确重庆地区辣椒疫霉Phytophthora capsici交配型分布及对烯酰吗啉的敏感性情况, 对2019年-2020年分离的辣椒疫霉进行交配型和敏感性测定?研究发现重庆地区存在A1和A2两种交配型, 且两者在大部分地区同时存在, 测定的102株菌株中, 24株菌株为A1交配型, 78株为A2交配型, 2种交配型的发生频率分别为23.53%和76.47%?采自重庆潼南?巴南?石柱等地的102株辣椒疫霉菌株对烯酰吗啉的敏感性测定结果显示, 其EC50分布在0.107 5~0.438 3 μg/mL之间, 最不敏感菌株是最敏感菌株的4.1倍, 平均EC50为(0.296 2±0.005 3)μg/mL?102株菌株对烯酰吗啉的敏感性分布呈单峰曲线, 未出现抗药性病原菌亚群体? |
| 英文摘要: |
| In order to clarify the mating type distribution of Phytophthora capsici and its sensitivity to dimethomorph in Chongqing, the mating types and sensitivity of P. capsici isolated in 2019-2020 were determined. The results showed that there were two mating types (A1 and A2) in Chongqing, and they existed in most areas at the same time. Among 102 isolates, 24 were A1 mating type and 78 were A2 mating type. The frequencies of two mating types were 23.53% and 76.47%, respectively. Their sensitivity to dimethomorph was tested, and the results showed that their EC50 values ranged from 0.107 5 to 0.438 3 μg/mL, with an overall mean of (0.296 2±0.005 3) μg/mL. The EC50 value of the most insensitive strain was 4.1 times of that the most sensitive strain.The distribution curve of sensitivity frequencies of P.capsici to dimethomorph was unimodal, and there was no resistant subpopulation among these isolates. |
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