Publications by authors named "J Jaquiery"
Background: Transitions from sexual to asexual reproduction are common in eukaryotes, but the underlying mechanisms remain poorly known. The pea aphid-Acyrthosiphon pisum-exhibits reproductive polymorphism, with cyclical parthenogenetic and obligate parthenogenetic lineages, offering an opportunity to decipher the genetic basis of sex loss. Previous work on this species identified a single 840 kb region controlling reproductive polymorphism and carrying 32 genes.
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- The research investigates the genetics behind the loss of sexual reproduction in the pea aphid, specifically comparing cyclical parthenogenetic (CP) and obligate parthenogenetic (OP) lineages.
- An 840-kb X-linked genomic region was identified that correlates with reproductive modes, displaying significant divergence between CP and OP populations.
- Despite this divergence, low genetic differentiation in the rest of the genome suggests ongoing gene flow between CP and OP lineages, which may aid in the survival of both reproductive strategies under varying environmental conditions.
Transition from sexual reproduction to parthenogenesis constitutes a major life-history change with deep evolutionary consequences for sex-related traits, which are expected to decay. The pea aphid Acyrthosiphon pisum shows intraspecific reproductive polymorphism, with cold-resistant cyclically parthenogenetic (CP) lineages that alternate sexual and asexual generations and cold-sensitive obligately parthenogenetic (OP) lineages that produce only asexual females but still males. Here, the genotyping of 219 pea aphid lineages collected in cold-winter and mild-winter regions revealed contrasting population structures.
View Article and Find Full Text PDFMany insect species display a remarkable ability to produce discrete phenotypes in response to changes in environmental conditions. Such phenotypic plasticity is referred to as polyphenism. Seasonal, dispersal and caste polyphenisms correspond to the most-studied examples that are environmentally-induced in insects.
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- Effector proteins are essential in plant-parasite interactions, particularly as aphids inject them into plants to aid in feeding, while also potentially triggering plant defense mechanisms.
- The study investigates the relationship between different biotypes of the pea aphid and their ability to feed on specific host legume plants through variations in salivary effector proteins.
- RNA-seq experiments were conducted to analyze these proteins, revealing both common and biotype-specific salivary effector genes, with some differentially regulated genes indicating tailored adaptations for host compatibility.