中文摘要：经过3年研究，作者比较了杂交玉米中的黄曲霉毒素累积和核感染情况，该杂交玉米接种了6种浓度的黄曲霉分离物 NRRL 3357或者A寄生虫分离物NRRL 6111，而这些分离物是降散盘衣酸的生成者。由于本研究中黄曲霉毒素评估是在温暖潮湿的环境下进行的，因此通过低接种浓度来减少植物的疾病压力，这有助于识别能够在一定程度上抵御黄曲霉毒素累积的基因型。
外文摘要：Over a 3-years period, we compared aflatoxin accumulation and kernel infection in maize hybrids inoculated with six inoculum concentrations of Aspergillus flavus isolate NRRL 3357 or A. parasiticus isolate NRRL 6111 which is a norsolorinic acid producer. Aflatoxin resistant and susceptible maize hybrids were inoculated with six conidial concentrations (ranging from 1 × 103 to 1 × 108/ml) of either A. flavus or A. parasiticus using the side-needle technique 7 days after midsilk (50 % of the plants had silks emerged). Aspergillus kernel infection and aflatoxin contamination was determined at ca. 63 days after midsilk. For each hybrid, aflatoxin levels were very similar regardless of the inoculum concentration. With the exception of the A. parasiticus treatments in 2007, the lowest inoculum conidial concentration (1 × 103/ml) for both fungal species was sufficient to produce statistical differences between the resistant and the susceptible maize hybrids for aflatoxin contamination. There was more variability in kernel infection between inoculum concentrations than that observed in aflatoxin accumulation. Since our aflatoxin evaluations are conducted in a warm, humid environment, putting less disease pressure on plants via lower inoculum concentrations may make it possible to identify genotypes that have moderate levels of resistance to aflatoxin accumulation.
外文关键词：Aflatoxin;Aspergillus flavus;Aspergillus parasiticus;Corn;Fungal infection;Maize;Resistance
作者：Windham, Gary L.; Williams, W. Paul
作者单位：USDA ARS,USA
期刊名称：PHYTOPARASITICA
期刊影响因子：1.034
出版年份：2016
出版刊次：7
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