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首页> 外文期刊>Plant Disease >Population Genetic Structure of Qol-Resistant Pestalotiopsis longiseta Isolates Causing Tea Gray Blight
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Population Genetic Structure of Qol-Resistant Pestalotiopsis longiseta Isolates Causing Tea Gray Blight

机译：引起茶灰白叶枯病的耐Qol长寿粉虱种群遗传结构

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摘要

Resistance to the quinone outside inhibitor (Qol) fungicides in the tea gray blight-causing fungus Pestalotiopsis longiseta is a serious problem in Japanese tea cultivation. We conducted a population genetic analysis of Qol-resistant P. longiseta isolates on the Makinohara Plateau, Shizuoka Prefecture, Japan's largest tea-growing area, to elucidate the disease's epidemiology and the spread of Qol resistance. Inter simple sequence repeat (ISSR) analysis of 1,083 isolates from 395 fields collected from2009 to 2012 detected 42 ISSR types, designated as PL01 to PL42. A total of 18, seven, and 38 ISSR types were detected in highly resistant, moderately resistant, and sensitive isolates, respectively. No distinct phylogeneticrelationship corresponding to Qol sensitivity or sampling location was observed. No annual changes in the population genetic structure of highly resistant isolates were observed during the study period. A different ISSR type was predominant among Qol-resistant isolates in each region. Analysis of molecular variance revealed significant genetic differentiation in populations of highly resistant isolates among regions (FCT = 0.213) and farmers (FCT = 0.071). Consequently, we speculate that Qol-resistant P. longiseta strains occurred in a number of clonal lineages and spread by both natural and artificial transmission, such as rain splash and plucking machines, throughout each region on the Makinohara Plateau.
机译：茶灰枯病真菌长白粉虱（Pestalotiopsis longiseta）对醌外抑制剂（Qol）杀真菌剂的抗性是日本茶栽培中的一个严重问题。我们对日本最大的茶叶种植区静冈县牧之原高原的耐Qol的长假单胞菌菌株进行了群体遗传分析，以阐明该病的流行病学和Qol耐药性的传播。从2009年至2012年对395个田地的1,083个分离株进行的简单序列重复（ISSR）分析发现了42种ISSR类型，命名为PL01至PL42。在高抗性，中抗性和敏感菌株中分别检测到18种，7种和38种ISSR类型。没有观察到与Qol敏感性或采样位置相对应的明显系统发育关系。在研究期间，未观察到高抗性菌株的群体遗传结构的年度变化。在每个区域的耐Qol分离株中，不同的ISSR类型占主要地位。分子变异分析表明，在区域（FCT = 0.213）和农民（FCT = 0.071）之间，高抗性分离株群体具有显着的遗传分化。因此，我们推测耐Qol的P. longiseta菌株发生在许多克隆谱系中，并通过自然和人工传播（如雨水飞溅和拔毛机）在牧野原高原的每个区域传播。

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