The Spodoptera frugiperda, is one of the most deleterious pests of popcorn and the identification of tolerant genotypes is determinant in breeding programs. The objective of this study was to select popcorn genotypes tolerant to S. frugiperda and the key traits related to the identification of tolerance. The popcorn varieties UEM J1, Composto Márcia, Arachida, Composto Gaúcho and Zapalote Chico (resistant check) were evaluated in a completely randomized design with 100 replications. The experimental unit consisted of one Petri dish, containing plant material and a larva. The following traits were evaluated: larval stage duration (LSt), food intake weight (IW), final larva weight (FW), mean larva weight (MW), feces (F), assimilated (A) and metabolized food weight (M), relative consumption rate (RCR), relative metabolic rate (RMR), relative growth rate (RGR), conversion efficiency of ingested food (CEI), apparent digestibility (AD), conversion efficiency of digested food (CED) and leaf area consumed (LAC). The diagnosis of multicollinearity, analysis of canonical variables, genetic divergence, hierarchical clustering, factor analysis and canonical correspondence analysis were carried out to perform multivariate analysis. After the multicollinearity test, the traits FW, IW, RCR, AD and LAC were maintained for further analysis. Variety Arachida was considered tolerant to S. frugiperda and can be used in the future as a source of favorable alleles to breed tolerant popcorn hybrids. The traits relative consumption rate, apparent digestibility and leaf area consumed were considered key traits in the identification of tolerance against S. frugiperda in popcorn genotypes.

中文翻译：

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耐节食夜蛾的爆米花基因型选择及与耐性鉴定相关的关键性状

贪夜蛾（Spodoptera frugiperda）是爆米花中最有害的害虫之一，对耐性基因型的鉴定是育种计划的决定性因素。这项研究的目的是选择耐受S. frugiperda的爆米花基因型以及与耐性鉴定相关的关键性状。爆米花品种UEM J1，CompostoMárcia，Arachida，CompostoGaúcho和Zapalote Chico（抗性检查）在完全随机的设计中进行了100次重复评估。实验单元由一个含有植物材料和幼虫的培养皿组成。评价以下特征：幼虫期持续时间（LSt），摄食重量（IW），最终幼虫重量（FW），平均幼虫重量（MW），粪便（F），同化（A）和代谢食品重量（M） ，相对消耗率（RCR），相对代谢率（RMR），相对增长率（RGR），食用食物的转化效率（CEI），表观消化率（AD），消化食品的转化效率（CED）和食用叶面积（LAC）。进行多共线性诊断，典型变量分析，遗传差异，层次聚类，因子分析和典型对应分析，以进行多变量分析。经过多重共线性测试后，特征FW，IW，RCR，AD和LAC得以保留以进行进一步分析。蜘蛛科品种被认为是对S. frugiperda具有耐受性，将来可作为有利等位基因的来源来繁殖耐性爆米花杂种。在鉴定爆米花基因型对S. frugiperda的耐受性时，认为相对消耗率，表观消化率和叶面积消耗是关键性状。消化食品的转化效率（CEI），表观消化率（AD），消化食品的转化效率（CED）和食用叶面积（LAC）。进行多共线性诊断，典型变量分析，遗传差异，层次聚类，因子分析和典型对应分析，以进行多变量分析。经过多重共线性测试后，特征FW，IW，RCR，AD和LAC得以保留以进行进一步分析。蜘蛛科品种被认为是对S. frugiperda具有耐受性，将来可作为有利等位基因的来源来繁殖耐性爆米花杂种。在鉴定爆米花基因型对S. frugiperda的耐受性时，认为相对消耗率，表观消化率和叶面积消耗是关键性状。消化食品的转化效率（CEI），表观消化率（AD），消化食品的转化效率（CED）和食用叶面积（LAC）。进行多共线性诊断，典型变量分析，遗传差异，层次聚类，因子分析和典型对应分析，以进行多变量分析。经过多重共线性测试后，特征FW，IW，RCR，AD和LAC得以保留以进行进一步分析。蜘蛛科品种被认为是对S. frugiperda具有耐受性，将来可作为有利等位基因的来源来繁殖耐性爆米花杂种。在鉴定爆米花基因型对S. frugiperda的耐受性时，认为相对消耗率，表观消化率和叶面积消耗是关键性状。