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首页> 外文期刊>Plant Disease >Genetic Diversity and Population Structure of Pythium irregulare from Soybean and Corn Production Fields in Ohio
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Genetic Diversity and Population Structure of Pythium irregulare from Soybean and Corn Production Fields in Ohio

机译：俄亥俄州大豆和玉米生产领域植物多幂的遗传多样性和人口结构

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摘要

High levels of genetic diversity have been described within the Pythium irregulare complex from several host plants; however, little is known about the population structure in fields used for grain production. Therefore, the objective of this study was to evaluate the genetic diversity and population structure of 53 isolates baited from 28 soybean and corn production fields from 25 counties in Ohio. Genetic diversity was characterized based on sequence analysis of the internal transcribed spacer (ITS1-5.8S-1TS2) region and with 21 simple sequence repeat (SSR) markers. In addition, aggressiveness on soybean, optimum growth temperature, and sensitivity to metalaxyl fungicide were determined. ITS sequence analysis indicated that four isolates clustered with P. cryptoirregulare, whereas the remaining isolates clustered with P. irregulare that was subdivided into two groups (1 and 2). Cluster analysis of SSR data revealed a similar subdivision, which was also supported by structure analysis. The isolates from group 2 grew at a slower rate, but both groups of P. irregulare and P. cryptoirregulare recovered in this study had the same optimum growth at 27 degrees C. Variability of aggressiveness and sensitivity toward metalaxyl fungicide was also observed among isolates within each group. The results from this study will help in the selection of isolates to be used in screening for resistance, assessment of fungicide efficacy, and disease management recommendations.
机译：从几个宿主植物中，在糖菊植物中描述了高水平的遗传多样性;然而，对于用于粮食生产的领域的人口结构几乎是知之甚少。因此，本研究的目的是评估从俄亥俄州25个县的28个豆类和玉米生产领域的53个分离物的遗传多样性和人口结构。基于内部转录间隔物（ITS1-5.8S-1TS2）区域和21例简单序列重复（SSR）标记的序列分析表征遗传多样性。此外，确定了大豆，最佳生长温度和对金属酰氧杀菌剂的敏感性的侵蚀性。其序列分析表明，四个分离株与P. CryptiRegulare聚集，而剩余的分离物与P.患者细分为两组（1和2）。 SSR数据的集群分析显示了类似的细分，也通过结构分析支持。 2组的分离株以较慢的速率增长，但在该研究中回收的P. Ifregulare和P. Cryptogulare的两组在27摄氏度中具有相同的最佳增长。在分离物中，还观察到敏感性和敏感性敏感性的可变性每组。本研究的结果将有助于选择用于筛选抗性，杀菌剂评估和疾病管理建议的分离株。

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  • 来源
    《Plant Disease》 |2018年第10期|共12页
  • 作者

    Huzar-Novakowiski J.; Dorrance A. E.;

  • 作者单位

    Ohio State Univ Ohio Agr Res &

    Dev Ctr Dept Plant Pathol Wooster OH 44691 USA;

    Ohio State Univ Ohio Agr Res &

    Dev Ctr Dept Plant Pathol Wooster OH 44691 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物保护;
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