Dumas P

References (2)

Title : Transcriptomics-Based Approach Identifies Spinosad-Associated Targets in the Colorado Potato Beetle, Leptinotarsa decemlineata - Bastarache_2020_Insects_11_
Author(s) : Bastarache P , Wajnberg G , Dumas P , Chacko S , Lacroix J , Crapoulet N , Moffat CE , Morin P, Jr.
Ref : Insects , 11 : , 2020
Abstract : The Colorado potato beetle Leptinotarsa decemlineata is an insect pest that threatens potato crops globally. The primary method to control its damage on potato plants is the use of insecticides, including imidacloprid, chlorantraniliprole and spinosad. However, insecticide resistance has been frequently observed in Colorado potato beetles. The molecular targets and the basis of resistance to imidacloprid and chlorantraniliprole have both been previously quantified. This work was undertaken with the overarching goal of better characterizing the molecular changes associated with spinosad exposure in this insect pest. Next-generation sequencing was conducted to identify transcripts that were differentially expressed between Colorado potato beetles exposed to spinosad versus control insects. Results showed several transcripts that exhibit different expression levels between the two conditions, including ones coding for venom carboxylesterase-6, chitinase 10, juvenile hormone esterase and multidrug resistance-associated protein 4. In addition, several microRNAs, such as miR-12-3p and miR-750-3p, were also modulated in the investigated conditions. Overall, this work reveals a molecular footprint underlying spinosad response in Colorado potato beetles and provides novel leads that could be targeted as part of RNAi-based approaches to control this insect pest.
ESTHER : Bastarache_2020_Insects_11_
PubMedSearch : Bastarache_2020_Insects_11_
PubMedID: 33233355

Title : Two genomes of highly polyphagous lepidopteran pests (Spodoptera frugiperda, Noctuidae) with different host-plant ranges - Gouin_2017_Sci.Rep_7_11816
Author(s) : Gouin A , Bretaudeau A , Nam K , Gimenez S , Aury JM , Duvic B , Hilliou F , Durand N , Montagne N , Darboux I , Kuwar S , Chertemps T , Siaussat D , Bretschneider A , Mone Y , Ahn SJ , Hanniger S , Grenet AG , Neunemann D , Maumus F , Luyten I , Labadie K , Xu W , Koutroumpa F , Escoubas JM , Llopis A , Mabeche-Coisne M , Salasc F , Tomar A , Anderson AR , Khan SA , Dumas P , Orsucci M , Guy J , Belser C , Alberti A , Noel B , Couloux A , Mercier J , Nidelet S , Dubois E , Liu NY , Boulogne I , Mirabeau O , Le Goff G , Gordon K , Oakeshott J , Consoli FL , Volkoff AN , Fescemyer HW , Marden JH , Luthe DS , Herrero S , Heckel DG , Wincker P , Kergoat GJ , Amselem J , Quesneville H , Groot AT , Jacquin-Joly E , Negre N , Lemaitre C , Legeai F , d'Alencon E , Fournier P
Ref : Sci Rep , 7 :11816 , 2017
Abstract : Emergence of polyphagous herbivorous insects entails significant adaptation to recognize, detoxify and digest a variety of host-plants. Despite of its biological and practical importance - since insects eat 20% of crops - no exhaustive analysis of gene repertoires required for adaptations in generalist insect herbivores has previously been performed. The noctuid moth Spodoptera frugiperda ranks as one of the world's worst agricultural pests. This insect is polyphagous while the majority of other lepidopteran herbivores are specialist. It consists of two morphologically indistinguishable strains ("C" and "R") that have different host plant ranges. To describe the evolutionary mechanisms that both enable the emergence of polyphagous herbivory and lead to the shift in the host preference, we analyzed whole genome sequences from laboratory and natural populations of both strains. We observed huge expansions of genes associated with chemosensation and detoxification compared with specialist Lepidoptera. These expansions are largely due to tandem duplication, a possible adaptation mechanism enabling polyphagy. Individuals from natural C and R populations show significant genomic differentiation. We found signatures of positive selection in genes involved in chemoreception, detoxification and digestion, and copy number variation in the two latter gene families, suggesting an adaptive role for structural variation.
ESTHER : Gouin_2017_Sci.Rep_7_11816
PubMedSearch : Gouin_2017_Sci.Rep_7_11816
PubMedID: 28947760