Padrões de coloração das Tégminas de Mahanarva Spectabilis (Hemiptera: Cercopidae): aspectos biológicos e moleculares

Abstract

The variability in the pattern of wing coloring is a characteristic of Mahanarva spectabilis (Distant, 1909), an important pest in forages. The objective of this study was to evaluate if there is fertility differences and dominance of alar patterns obtained from crossing M. spectabilis and molecular differences between the wing standards. Specimens M. spectabilis were separated according to the standard wing ((AN) straw yellow to black spots (RCV) to reddish black spots, (V) fully red, (C) totally black) and separated for reproduction having the offspring evaluated for standard wing. The fertility, measured in number of eggs, and the patterns obtained in the F1 generation were subjected to analysis of variance (ANOVA) test followed average Scott- Knott (P <0.05). In the genetic variability test, adults of all three species had DNA extracted with cetyltrimethylammonium bromide (CTAB) and tested with molecular markers. The presence or absence of bands generated binary table used in various types of analyzes (diversity (Jaccard Index), principal components (PCA), molecular variance (AMOVA) and non-weighted arithmetic average of peer groups (UPGMA)). It was found that the number of eggs decreased significantly when the crossing involved a standard male AN and that the phenotype of the parent was instrumental in fertility and the seed pattern. The molecular primers produced exclusive brands that separated M. spectabilis species used as external standards (Mahanarva fimbriolata, Mahanarva tristis), but not with respect to different standards of wings of M. spectabilis. Differences between geographically separated individuals were noticeable.