The development of maize (Zea mays L.) hybrids that are adapted to subtropical areas of North America should consider yield potential under heat and moisture stress, and reduced susceptibility to insect herbivory and disease. To aid in this process, maize hybrids (43 developmental and seven non-Bt commercial hybrids) were evaluated for severity of ear injury to Helicoverpa zea (Boddie) and Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), susceptibility to Aspergillus flavus (Link) (Deuteromycetes: Moniliales), and yield. In subtropical Corpus Christi and College Station, TX, field experiments conducted over three years revealed significant differences among maize hybrids with the rank of the selected measurements differing across the two locations. When the location by maize hybrid interaction was not significant, variation across the main factors of maize hybrid genetics (in all cases) and location (in some cases) was detected. In 2014, a significant location by maize hybrid interaction in yield but not aflatoxin and ear injury were likely associated with differences in weather between locations. In Corpus Christi in 2015, a location by maize hybrid interaction was detected for ear injury only. Overall, experimental maize hybrids, containing the inbred line Tx777, displayed partial resistance to insect derived ear injury in both locations, and some hybrid testcrosses exhibited low rates of aflatoxin accumulation while maintaining relatively high yields. Tx777 was selected from populations originating in Bolivia and adapted to subtropical climates. The most promising hybrid testcrosses had lower ear injury and aflatoxin accumulation, and good yield under varying heat and moisture stress at the two subtropical maize growing areas in this study.

中文翻译：

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适应北美亚热带的发育型和商业型玉米杂交种的产量、虫源性耳损伤和黄曲霉毒素

适应北美亚热带地区的玉米 (Zea mays L.) 杂交种的开发应考虑在高温和水分胁迫下的产量潜力，以及降低对昆虫食草和疾病的易感性。为了帮助完成这一过程，对玉米杂交种（43 个发育中的和 7 个非 Bt 商业杂交种）的耳部损伤严重程度进行了评估，包括对 Helicoverpa zea (Boddie) 和 Spodoptera frugiperda (JE Smith)（鳞翅目：夜蛾科）的严重程度，以及对黄曲霉的敏感性（ Link）（半知菌纲：Moniliales）和产量。在亚热带科珀斯克里斯蒂和德克萨斯大学城，三年多的田间试验揭示了玉米杂交种之间的显着差异，两个地点的所选测量值等级不同。当玉米杂交互作定位不显着时，检测到玉米杂交遗传（在所有情况下）和位置（在某些情况下）的主要因素之间的变异。2014 年，玉米杂交在产量上相互作用的一个重要位置，而不是黄曲霉毒素和耳朵损伤，这可能与位置之间的天气差异有关。2015 年在科珀斯克里斯蒂，一个由玉米杂交相互作用产生的位置仅被检测到耳朵受伤。总体而言，包含自交系 Tx777 的实验性玉米杂种在两个位置都显示出对昆虫源性耳损伤的部分抗性，并且一些杂种测试杂交在保持相对较高产量的同时表现出低黄曲霉毒素积累率。Tx777 选自原产于玻利维亚并适应亚热带气候的种群。最有希望的杂交测试杂交具有较低的耳损伤和黄曲霉毒素积累，