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3 results for “Venturia canescens”
Fig. (10-17): (10) Dichrogaster aestivalis, fore wing; (11) C. armator, areolet of fore wing; (12) Mesostenus sp., areolet of fore wing; (13) Venturia canescens, ovipositor; (14) Barichneumon sp.; ventral aspect of metasoma; (15) Ctenichneumon sp., ventral aspect of metasoma; (16) Exochus castaniventris, frontal view of head; (17) Diplazon laetatorius, frontal view of head. in Ichneumonidae from the Suez Canal region Egypt (Hymenoptera, Ichneumonoidea)
Fig. (10-17): (10) Dichrogaster aestivalis, fore wing; (11) C. armator, areolet of fore wing; (12) Mesostenus sp., areolet of fore wing; (13) Venturia canescens, ovipositor; (14) Barichneumon sp.; ventral aspect of metasoma; (15) Ctenichneumon sp., ventral aspect of metasoma; (16) Exochus castaniventris, frontal view of head; (17) Diplazon laetatorius, frontal view of head.
Foraging behaviour variations, for gene expression and transcriptomic divergence in parasitic wasp populations of Venturia canescens
<p><span>Foraging behaviours encompass strategies to locate resources and to exploit them. In many taxa, these behaviours are driven by a major gene called <em>for</em>, but mechanisms vary </span><span>between species. In the parasitoid wasp <em>Venturia</em> <em>canescens</em>, sexual and asexual populations coexist in sympatry but differ in life-history trait, physiology and behaviours,</span> <span>which could impact their foraging strategies. </span><span>Here, we explored the molecular bases underpinning divergence in behaviours by testing two mutually nonexclusive hypotheses: first, </span><span>the divergence in the <em>for</em> gene correlates with difference in foraging strategies, and second, the latter rely on a divergence in whole-genome expression. Using comparative genomics, we showed that the <em>for</em> gene was conserved across insects considering both sequence and gene model complexity. Polymorphism analysis did not support the occurrence of two allelic variants diverging across the two populations, yet the asexual population exhibited less polymorphism than the sexual population. Sexual and asexual transcriptomes sharply split, with 10.9% of differentially expressed genes, but these were not enriched in behavioural-related genes. We showed that the <em>for</em> gene was more highly expressed in asexual female heads than in sexual heads and that those differences correlate with divergence in foraging behaviours in our experiment since asexuals explored the environment more and exploited more host patches. Overall, these results suggested that fine tuning of <em>for</em> gene expression between populations may have led to distinct foraging behaviours. We hypothesized that reproductive polymorphism and coexistence in sympatry of sexual and asexual populations specialized to different ecological niches via divergent optima on phenotypic traits could imply adaptation through different expression patterns of the for gene and at many other loci throughout the genome.</span></p>
Foraging behaviour variations, for gene expression and transcriptomic divergence in parasitic wasp populations of Venturia canescens
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