中文摘要：伏马毒素是一组主要由镰刀菌产生的真菌毒素，有几种不同的形式，其中伏马毒素B1和B2是玉米中最常见且经济上最重要的形式。本研究旨在调查巴西南部两个地区种植的四种基因型玉米粒中伏马毒素和镰刀菌属的存在情况。结果在所有样品中均检测到伏马毒素 B1和B2；而统计分析表明，遗传分化的重要部分与玉米种植的地区有关。
外文摘要：The fumonisins are a group of mycotoxins produced primarily by Fusarium spp. There are several different forms of fumonisins, among them fumonisins B-1 and B-2 are the most common and economically important forms in maize. The aim of this study was to investigate the presence of fumonisins and Fusarium spp. in kernels of four maize genotypes grown in two Southern Brazilian locations. Fumonisins B-1 and B-2 were detected in all samples, with levels ranging from 0.4 to 9.1 mu g x g(-1). Of the 3840 maize kernels examined, 77.0% were infected with Fusarium spp., and F. verticillioides was the most prevalent species (98.1%). In addition, we found that approximately 95% of the isolates of F. verticillioides harbor essential genes for fumonisin biosynthesis (FUM1 and FUM8). Next, we investigated the genetic structure of F verticillioides populations based on molecular data generated by the AFLP technique, which revealed a high genetic variability. Statistical analyses have shown that a significant part of the genetic differentiation was associated with the maize growing location.
 
外文关键词：Fusarium verticillioides； Fumonisins； Maize kernels； AFLP； Genetic variation
作者：Silva, JJ； Viaro, HP； Ferranti, LS； Oliveira, ALM； Ferreira, JM； Ruas,CF； Ono, EYS； Fungaro, MHP
作者单位：Univ Estadual Londrina
期刊名称：CROP PROTECTION
期刊影响因子：1.652
出版年份：2017
出版刊次：99
点击下载：巴西南部种植的玉米中串珠镰刀菌种群的遗传结构和伏马菌素的出现