Estrutura genética de populações nordestinas de Rhynchophorus palmarum (L.) (Coleoptera: Curculionidae)

Abstract

Among the insects described in the Curculionidae family, ten species are classified as belonging to the genus Rhynchophorus, among which seven are considered pests of coconut palm (Cocos nucifera) and other Aarecáceas. Among these, it stands out the severity of damage, the drill-the-eye-of-coconut tree, Rhynchophorus Palmarum (Linnaeus). This insect has American origin, and occurs throughout Brazil, infesting at least 12 plant families. Despite the recognition that species like the plague, few molecular studies have been documented about him, and all the information of these species and their populations fully based on morphological characteristics. Genetic studies see allowing investigate the genetic diversity between populations and between species and their evolutionary destiny over time. In this context, this study aimed to carry out a molecular study by molecular marker COX I seven people, distributed in four states in northeastern Brazil and identified primarily as R. Palmarum and analyze the genetic divergence between populations. Through the reconstruction of phylogeny it was detected the presence of two clearly distinct clades. Through the network haplotypes it was possible to detect the presence of only 12 haplotypes where the haplotype H1 is the most common because of its presence in 117 subjects divided in six of the seven populations studied. It was also observed that the FST index showed a high value, indicating genetic divergence estimated from FST parameter (0,00- 0.848) when compared to the population of Fortaleza (CE) with the other.