Multivariate Analysis Reveals Key Traits of Fall Armyworm Resistance in Tropical Popcorn Genotypes

Bragantia, Campinas, Ahead of print, 2019 ABSTRACT: In the present study it is hypothesized that the germplasm of popcorn of tropical regions shows resistance to FAW, and the multivariate analysis can characterize the main traits of this resistance. Thus, the aim of this study was to identify key traits used to select fall armyworm resistance in popcorn by using factor and cluster analyses. Sixteen biological traits were evaluated at larval and pupae stages: total number of armyworm, time larval period, final mass of caterpillars, total mass of caterpillars, mean mass of caterpillars, pupae period, mass of pupae and some indices used to evaluate the food consumed by the caterpillars. Multicollinearity diagnosis, factor and canonical analysis, and the genetic divergence among the genotypes were performed to implement multivariate analysis. The groups were Multivariate analysis reveals key traits of fall armyworm resistance in tropical popcorn genotypes Rafael Egea Sanches1, Andréia Kazumi Suzukawa1*, Rodrigo Iván Contreras-Soto2, Diego Ary Rizzardi1, Mauricio Carlos Kuki1, Douglas Mariani Zeffa1, Fernando Alves de Albuquerque1, Carlos Alberto Scapim1 1.Universidade Estadual de Maringá Departamento de Agronomia Maringá (PR), Brazil. 2.Universidad de O’Higgins Instituto de Ciencias Agronómicas y Veterinarias Rancagua, Chile.