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首页> 外文期刊>World Journal of Microbiology & Biotechnology >Genetic diversity studies based on morpho-pathological and molecular variability of the Sclerotinia sclerotiorum population infecting potato (Solanum tuberosum L.)
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Genetic diversity studies based on morpho-pathological and molecular variability of the Sclerotinia sclerotiorum population infecting potato (Solanum tuberosum L.)

机译：基于菌菌菌毒素群体感染马铃薯（Solanum Tuberosum L.）的遗传多样性研究

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摘要

White mould or stem rot, caused by Sclerotinia sclerotiorum (Lib.) de Bary, is a devastating fungal disease found in major potato cultivation areas worldwide. The aim of this study was to characterize genetic diversity in the S. sclerotiorum population from the main potato producing regions of India by means of morphological (mycelial growth, colony colour, number and distribution pattern of sclerotia) and molecular characteristics, as well as to evaluate the virulence of S. sclerotiorum isolates in potato for the first time. Among the S. sclerotiorum population analyzed, high phenotypic and genotypic diversity were observed. Using all the morphological characteristics, a dendrogram was constructed based on Gower's similarity coefficient that distributed all the isolates into three clusters at the 0.62 similarity coefficient. Carpogenic germination of apothecia revealed that larger sclerotia produced a greater number of apothecia while smaller sclerotia produced fewer apothecia. Pathogenicity test results revealed that out of 25 isolates, seven were highly aggressive, 14 were moderate and four had low aggressiveness, whilst isolates from Punjab were more pathogenic than those of Uttar Pradesh. Phylogenetic analysis of universal rice primer polymorphism showed high genetic variability within the isolates that grouped all the isolates in three evolutionary lineages in the resulting dendrogram and showed partial relationship with geographical locations of the isolates. Further, the findings suggest the occurrence of higher heterogeneity and genetic diversity among the S. sclerotiorum isolates that indicates the existence of both clonal and sexual reproduction in the pathogen population of potato producing areas in India.
机译：由Sclerotinia Sclerotiorum（Lib。）De Bary引起的白色模具或茎腐，是全球主要马铃薯栽培区域的毁灭性真菌疾病。本研究的目的是通过形态学（菌丝体生长，核心的菌落颜色，核心）和分子特征以及分子特征，以及分子特征以及分子特性的来自印度的主要马铃薯生产区域的S.Sclerionum人口遗传多样性。以及分子特征，以及分子特征第一次评价马铃薯中S.Sclerotiorum分离物的毒力。分析了S.Sclerotiorum人群中，观察到高表型和基因型多样性。使用所有形态特征，基于Gower的相似系数构建了树木图，该系数将所有隔离物分布到0.62相似系数的三簇中。 Apothecia的癫痫发芽显示，较大的核心菌产生了更多的肺炎，而较小的巩膜产生少于症状。致病性测试结果表明，除了25个分离物中，七个是高度侵略性的，14个中度高，4个具有低侵略性，而来自旁遮普邦的分离株比北方邦的分离物更高。通用水稻底漆多态性的系统发育分析在分离的分离物中显示出高遗传变异，其在所得树状图中分组的三个进化谱系中的所有分离物，并与分离物的地理位置显示了部分关系。此外，研究结果表明，S.Sclerotiorum分离物中的异质性和遗传多样性的发生，这表明印度马铃薯生产区域的病原体群体存在克隆和性繁殖的存在。

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