Genetic diversity, phylogenetic and phylogeographic analyses of Oncideres impluviata (Germar, 1823) (Coleoptera: Cerambycidae) in Rio Grande do Sul state, Brazil

ABSTRACT The Cerambycidae Oncideres impluviata (Germar, 1823) is an important insect pest for Acacia mearnsii De Wild in Southern Brazil. The damage caused by their girdling behavior reduces tree productivity, specially in the early years of plant establishment, when girdling is performed on the mai...

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Published in:Revista Brasileira de Entomologia 2023-01, Vol.67 (1)
Main Authors: Machado, Dayanna do Nascimento, Costa, Ervandil Corrêa, Perini, Clérison Régis, Valmorbida, Ivair, Souza, Diego de Santana, Pedron, Leandra, Saldanha, Mateus Alves, Froehlich, Ricardo, Schühli, Guilherme, Greff, Henrique Pinton, Oliveira, Jeferson de, Arnemann, Jonas André
Format: Article
Language:English
Subjects:
Black wattle
ENTOMOLOGY
Forest pest management
Genetic diversity
Insect pest
mtDNA
Twig-girdling beetles
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Summary:ABSTRACT The Cerambycidae Oncideres impluviata (Germar, 1823) is an important insect pest for Acacia mearnsii De Wild in Southern Brazil. The damage caused by their girdling behavior reduces tree productivity, specially in the early years of plant establishment, when girdling is performed on the main trunk of trees. Here, we used a fragment of the mtDNA COI gene to analyze the genetic diversity, population structure and demography of O. impluviata in Southern Brazil, as well as to present the first hypothesis of phylogenetic relationships among species of the genus Oncideres. Our results identified five distinct haplotypes among the populations of O. impluviata, with the most common haplotype identified as O.imp_COI_01. The phylogenetic inferences corroborated the monophyly of O. impluviata with maximum statistical support. In addition, the phylogeny recovered three main population strains that are largely congruent with the haplotype network, which includes two lineages that are found in different edaphic regions of Rio Grande do Sul (Serra do Sudeste and Encosta Inferior do Nordeste). This is the first molecular phylogenetic assessment of O. impluviata. Our findings provide insights into the evolution of a significant species for the Brazilian forestry sector, as well as new resources for planning of pest management strategies.
ISSN:1806-9665
1806-9665
DOI:10.1590/1806-9665-rbent-2022-0092