Wolbachia strains, and lack of genetic diversity and parthenogenesis in Brazilian populations of Tuta absoluta (Lepidoptera: Gelechiidae)

The pheromone‐based control of the invasive tomato pinworm Tuta absoluta (Lepidoptera: Gelechiidae) has been unsatisfactory in some cases, and parthenogenesis was reported in this species. As the parthenogenesis phenomena is a shortcoming that compromises the pheromone‐based control of T. absoluta a...

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Bibliographic Details
Published in:Journal of applied entomology (1986) 2018-11, Vol.142 (9), p.905-910
Main Authors: Carvalho, Gislaine A., S. Corrêa, Alberto, Oliveria, Luiz Orlando, Chediak, Mateus, Siqueira, Herbert Á. A., Guedes, Raul Narciso C.
Format: Article
Language:English
Subjects:
Cytoplasmic incompatibility
Deoxyribonucleic acid
DNA
Eggs
endosymbiont
Gelechiidae
Genetic diversity
Haplotypes
Incompatibility
Infections
Insects
Lepidoptera
mating disruption
Mitochondrial DNA
Parthenogenesis
Pest control
pest management
Pests
Pheromones
Populations
Tomatoes
Tuta absoluta
Wolbachia
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Summary:The pheromone‐based control of the invasive tomato pinworm Tuta absoluta (Lepidoptera: Gelechiidae) has been unsatisfactory in some cases, and parthenogenesis was reported in this species. As the parthenogenesis phenomena is a shortcoming that compromises the pheromone‐based control of T. absoluta and that is potentially explained by the occurrence of the endosymbiont Wolbachia in this pest species, the objectives of this study were (i) to survey the Wolbachia strains in Brazilian pinworm populations, (ii) to assess the genetic diversity in the tomato pinworm, and (iii) to determine whether parthenogenesis does occur associated with the most representative combination of insect haplotype and Wolbachia strain. The 10 insect populations were infected with two Wolbachia strains (ST41 and ST354), with infection rates ranging from 70% to 100%. The insect genetic diversity was low with a single haplotype group present for both mitochondrial and nuclear DNA markers. The most representative combination of pinworm‐Wolbachia produced 6.88 ± 1.70 eggs per unmated female, all of which were inviable. Thus, Wolbachia infection does not lead to either parthenogenesis or pheromone‐based control failure among Brazilian populations of the tomato pinworm, but likely favours cytoplasmic incompatibility, which is also potentially useful as a pest management tool.
ISSN:0931-2048
1439-0418
DOI:10.1111/jen.12531