Cecile Lorrain
@ccilelorrain.bsky.social
190 followers 260 following 8 posts
SNSF Ambizione Fellow | Junior PI in Plant Pathology @ ETH Zürich | Specializing in fungal genome architecture & TE-driven evolution
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Reposted by Cecile Lorrain
chloegirard.bsky.social
🚨 First pre-print from my team !!

TL;DR: presence of polymorphism (sequence differences between the homologous chromosomes) can *increase* the local rate of recombination in Arabidopsis thaliana, turning cold regions of the genome hot (purple v. grey) !
The recombination frequency (cM/Mb) along chromosome 4 of A. thaliana (female meiosis). 

In full hybrids (grey), where polymorphism is distributed all along chromosomes, most crossovers occur in the regions surrounding the Centromere (Cen), and very few at chromosome ends (Tel: telomeres). 

In lines where polymorphism is restricted to chromosome ends (purple), the local recombination rate increases drastically, at the expense of the non-polymorphic regions (yellow).
Reposted by Cecile Lorrain
genomebiolevol.bsky.social
Weng et al. examined 431 genomes of butterflies and related lineages, revealing that horizontal transfer of digestion and detoxification genes facilitated the evolution of herbivory, enabling butterflies to co-evolve with angiosperm hosts.

🔗 doi.org/10.1093/gbe/evaf156

#genome #evolution #HGTsky
GBE | Gene Family Evolution Suggests Correlated Dietary Adaptations in Butterflies and Moths
Reposted by Cecile Lorrain
Reposted by Cecile Lorrain
stephenturner.us
Apple is entering the protein folding arena.
SimpleFold: Folding Proteins is Simpler than You Think arxiv.org/abs/2509.18480 🧬🖥️🧪 github.com/apple/ml-sim...
Reposted by Cecile Lorrain
arnausebe.bsky.social
Happy to share the Biodiversity Cell Atlas white paper, out today in @nature.com. We look at the possibilities, challenges, and potential impacts of molecularly mapping cells across the tree of life.
www.nature.com/articles/s41...
Reposted by Cecile Lorrain
bossdorf.bsky.social
Job Alert! We're hiring a BIOINFORMATICIAN / NGS SPECIALIST to support our new Molecular Biodiversity Lab in the @terra-cluster.org at @unituebingen.bsky.social. Like the idea to use your skills for understanding biodiversity? To work on diverse questions in a wonderful place? Apply!
Please repost!
Reposted by Cecile Lorrain
arnaudlerouzic.bsky.social
Come and join our team! A 2-year postdoc position is available in our "Genome Evolution" department at Univ Paris Saclay. We want to play with phylogenetic models accounting for horizontal transfers of transposable elements. Application& details on the official portal: emploi.cnrs.fr/Offres/CDD/U...
Object: Postdoc Position 

Building a phylogenetic model for horizontal transfers of transposable elements 

A postdoctoral position (24 months) is available to work at EGCE (Gif-sur-Yvette, France, CNRS / Université Paris-Saclay) from January 2026. 

Transposable elements (TEs) are repetitive DNA sequences capable of promoting their own mobility. They are widespread across the tree of life and often represent a substantial fraction of eukaryotic genomes. Beyond their ability to invade genomes, TEs are frequently reported to undergo horizontal transfer, enabling their colonization of new hosts. However, understanding and predicting how horizontal transfers shape the distribution of TEs among species is far from straightforward. In particular, estimates of transfer rates based on documented cases are both biased and approximate, since transfers occurring close to speciation events are virtually undetectable. This project aims to develop explicit phylogenetic models of TE evolution that incorporate horizontal transfers, and to use these models to obtain statistical estimates of key evolutionary dynamics of TE families across species (e.g., horizontal transfer and extinction rates). The postdoctoral project will focus on exploring the impact of horizontal transfers on the distribution of TE presence/absence among related species, using statistical and/or computational approaches. Context

The position will be part of a 4-year collaborative project funded by the French National Agency (ANR). The research consortium gathers two departments (from Paris-Saclay university and from Université Lyon 1), and involves 7 Pls and 5 postdocs and PhD students devoted to distinct workpackages of the project. The postdoc will be based at EGCE, which is part of the Institute for Ecology and Evolution (IDEEV). The institute offers an exciting and active scientific life, it is located on the new research campus of Paris-Saclay, 35 km south of Paris. 

Relevant references

Gilbert C et al. 2018. Horizontal acquisition of transposable elements and viral sequences: patterns and consequences. Cur. Opin. Genet. Dev. 49:15-24.

Le Rouzic A et al. 2013. Reconstructing the Evolutionary History of Transposable Elements. Genome Biol. Evol. 5:77-86.

Wallau GL et al. 2016. VHICA, a New Method to Discriminate between Vertical and Horizontal Transposon Transfer: Application to the Mariner Family within Drosophila. Mol Biol Evol 33:1094-1109.

Profile

We are looking for a motivated early career theoretical biologist, with a PhD in theoretical evolutionary biology. Skills in statistics, programming, bio-informatics, and phylogenetic models will be appreciated.

Application

Formal applications (CV and cover letter) have to be deposited on the CNRS job portal https://emploi.cnrs.fr/Offres/CDD/UMR9191-ARNLER-006/Default.aspx?lang=EN.
Reposted by Cecile Lorrain
dmacguig.bsky.social
Check out our new preprint! We compare sequence versus synteny approaches for resolving a challenging #phylogenetic problem. In this case, synteny is far more informative! Also includes the first chromosome-level #genome for the enigmatic #fish family Gyrinocheilidae. doi.org/10.1101/2025...
Reposted by Cecile Lorrain
natplants.nature.com
New OA Article: "A single-cell rice atlas integrates multi-species data to reveal cis-regulatory evolution" rdcu.be/eHce3

Chromatin accessibility in rice & related grasses: how regulatory DNA elements evolve across cell types & species; identifying potential silencers.
Reposted by Cecile Lorrain
juliusbrennecke.bsky.social
PIWI clade Argonautes are essential for transposon silencing. Without them, animals are sterile due to massive transposon activity.

But how does piRNA-guided target interaction translate into silencing?

PhD student Júlia Portell Montserrat has an intriguing answer

www.cell.com/molecular-ce...
Reposted by Cecile Lorrain
biorxiv-genomic.bsky.social
Active learning enables discovery of transcriptional activators across fungal evolutionary space https://www.biorxiv.org/content/10.1101/2025.09.12.675635v1
Reposted by Cecile Lorrain
biorxiv-evobio.bsky.social
Genome reorganisation and expansion shape 3D genome architecture and define a distinct regulatory landscape in coleoid cephalopods https://www.biorxiv.org/content/10.1101/2025.08.29.672809v1
Reposted by Cecile Lorrain
Reposted by Cecile Lorrain
arnausebe.bsky.social
We are looking for a student to continue our work on chromatin evolution:
www.nature.com/articles/s41...
www.biorxiv.org/content/10.1...

The project with @seanamontgomery.bsky.social will focus on chromatin state readers across eukaryotes.

More info: recruitment.crg.eu/content/jobs...
Reposted by Cecile Lorrain
plantevolution.bsky.social
1/2 Somatic TE transposition in plants is getting traction again (70 years after McClintock's discovery of "controlling elements")! A very large collection of somatic TE insertions in A. thaliana described by Ambreen et al.(www.biorxiv.org/content/10.1...).