André Marques

Out today in Nature: sex without crossovers. Rhynchospora tenuis makes pollen, fertilises and sets seed, yet 0 crossovers in 10,997 pollen nuclei. Chromosome drive and ~87% seed abortion rebuild the mother's genotype, so the offspring are clones. doi.org/10.1038/s415...

It was great to host Ines Drinnenberg at @mpipz.bsky.social for our Wednesday Seminar and great scientific discussions! Such an inspiring person and scientist!

Happy to have contributed to this awesome collaboration work with Yang Qu and my Brazilian colleagues! Ayahuasca plant genomes reveal retrotransposon-derived centromeres and contrasting routes to DMT and β-carbolines www.biorxiv.org/content/10.6...

Out now in @nature.com Research Briefings: Rhynchospora tenuis makes gametes without meiotic crossovers yet retains sexual reproduction. Only seeds that restore the parental chromosome combination are viable, giving clone-like offspring #meiosis4eva #SexualReproduction www.nature.com/articles/d41...

Nature ersearch paper: Sex without crossovers mimics clonal reproduction in Rhynchospora tenuis go.nature.com/3UXKc6g

Excited that our new paper with @henrylabsymbio.bsky.social and Kerry Oliver is out @pnas.org! We show that mobile genetic elements can spread adaptive host-benefiting traits across heritable insect symbionts on eco-evolutionary timescales.🧵 www.pnas.org/doi/10.1073/...

Thanks to the generosity of the Bezos Family Foundation, @basicsci.fredhutch.org is excited to announce a new search to recruit a Bezos Family Distinguished Scholar : apply.interfolio.com/193655

#EvoChromo ciliate kinetochores @maxraas.bsky.social @kopslab.bsky.social . Previous work w\ @jvhooff.bsky.social : tinyurl.com/y5h4ehnt showed a lack of Tetrahymena kinetochore complexity. Replacement, simplification or missed homologies? All of the above? - check out our pre-print tiny.cc/hp8w001

Excited to share this review that @needhibhalla.bsky.social and I wrote on meiotic checkpoints! www.annualreviews.org/content/jour...

This looks like an awesome review! Looking forward to reading it 🙌 congratulations @needhibhalla.bsky.social and @lacefieldlab.bsky.social

Our new paper in collaboration with @brandgefahr.bsky.social and the RinkLab www.nature.com/articles/s41...

📣We are #hiring Join the Department of Comparative Development and Genetics @mpipz.bsky.social to work on mechanisms underlying plant development & diversity in a Research Support role.🌿Apply now #plantsci 👉https://jobs.mpipz.mpg.de/jobposting/36d653f86928d4c47af6b4d32debc67692b34a7d0?ref=homepage

🚨 Paper: Active matter physics views living systems as open, out of equilibrium, and emergent. In a perspective on plant morphogenesis 🌱we discuss how such features arise from tissue hydromechanics, and how to model them. Thank you for your attention to this active matter. shorturl.at/IKKRt

Top 1% in @qedscience.bsky.social is now officially published in @nature.com

I am happy to present our work @liverworks.bsky.social @robinburns.bsky.social @alisondawnscott.bsky.social on centromeric repeat turnovers, of which we counted three in the Arabidopsis genus:

Sex without crossovers mimics clonal reproduction in Rhynchospora tenuis @Nature.com

www.derstandard.de/story/300000...

Brazilian beak-sedge reproduces through pollen, fertilization and seeds, but its surviving offspring are genetic clones of their mothers. More than 10,000 pollen nuclei showed no DNA crossovers. doi.org/hcjqf3

Brazilian sedge reproduces sexually but without DNA reshuffling, producing genetic clones phys.org/news/2026-09... via @phys.org.web.brid.gy

📣📣Paper Alert! New paper @nature.com from the Marques group @amarques.bsky.social and colleagues on Rhynchospora tenuis - 🌿a plant that reproduces sexually but has completely lost the reshuffling of DNA🧬 Congratulations! 👏 🥳 Read more👉 www.mpipz.mpg.de/pr-marques-2... www.nature.com/articles/s41...

I can help you illustrate your research with effective figures, graphical abstracts, and infographics Drawing to explain and inspire linktr.ee/dorotdesigns

Congratulations to all the authors! Thanks @amarques.bsky.social for trusting my illustration skills - I’m so happy to be a part of this and have contributed to illustrations and figure design #SciArt

New preprint from the lab!

Haplotype-specific chromosome painting unveils recombination patterns in the holocentric species Rhynchospora breviuscula H.Pfeiff. https://www.biorxiv.org/content/10.64898/2026.06.24.733714v1

Have a favorite European colleague who should be recognized for their work in non-medical biotechnology? Pls nominate them for the Novo Nordisk Foundation Prize for Biotechnology. (Prior awardees at novonordiskfoundationprize.com/awardees). Thank you! novonordiskfoundationprize.com/nominate-bio...

Projeto SolidarESA, da Casa do Produtor Rural, doa mais de 3 mil espigas de milho verde para doze entidades assistenciais de Piracicaba, beneficiando crianças, adolescentes e idosos da região

‼️Job altert🚨📢 please spread the word: We're looking for a postdoctoral researcher to join our new department "Phytopathology and Plant Protection" at @unihalle.bsky.social. www.verwaltung.uni-halle.de/DEZERN3/AUSS...

Our lab @mpi-mp-potsdam.bsky.social is hiring two postdoctoral researchers to join our ERC-funded GRAFT project on mobile small RNAs in plants. 🔗 Details: jobs.mpimp-golm.mpg.de/jobposting/b... 📅 Deadline: July 31, 2026 Please share!

Let s dive into the world of holocentric chromosomes with @amarques.bsky.social Wonderful talk ! #smbe2026

Heading now to #Copenhagen for attending the @official-smbe.bsky.social with several team members. Looking forward to exciting conversations and networking! Hope to see some of you there!

Happy to have two preprints of the lab featured within the 1% Read them: Sex without crossovers mimics clonal reproduction in Rhynchospora tenuis www.biorxiv.org/content/10.6... Pangenome analysis reveals the evolutionary dynamics of repeat-based holocentromeres www.biorxiv.org/content/10.6...

Time from submission to acceptance: 3 UK Prime Ministers.

It was "only a temporary place until they find a lab for her". She did not complain. But was it worth it? Will she make The 1%? 57,455 preprints evaluated, 574 selected. See you in 48 hours! #The1Percent #QEDScience #Preprints

Big week! Wednesday: "The 1%" (Wait for it!) Thursday: Traveling to Australia

#SMBE2026 S11: The evolution of recombination landscapes 🗓️ Tue Jun 30, 3:50pm 🔗 smbe2026.org/programme

Talks by: @aruizherrera.bsky.social Linda Odenthal-Hesse Marinela Dukic Tom Parée @mariontalbi.bsky.social @amarques.bsky.social Irene Tiemann-Boege Lou Guyot Laurie Steviso

RSPS2026 | Finalist: Dr. Andre Seco Marques da Silva | Presentation: Jun 2 13:00-13:30 (GMT) | Breaking the rules: Unconventional strategies in plant reproduction and chromosome organization | FREE to Watch via YouTube (youtube.com/@molecularpl...) / WeChat (MolPlant Channel)

🌱In unserem letzten Beitrag zum #fascinationofplantsday erklärt André Marques @amarques.bsky.social vom MPIPZ @mpipz.bsky.social was eine erfolgreiche Pflanze ausmacht und welche Rolle unterschiedliche Chromosomen dabei spielen können. Wirklich faszinierend! 😉

🌱Zum #fascinationofplantsday erklärt euch heute Bart Thomma @teamthomma.bsky.social von der Universität zu Köln @unicologne.bsky.social was am Zusammenspiel von Pflanzen und Bakterien so faszinierend ist! @hhu.de @mpipz.bsky.social @leibnizipk.bsky.social @fz-juelich.de

Happy to be selected as finalist!

✨ Paper spotlight ✨ (🧵 1/6) Somatic genome-doubling is the most parsimonious route to allopolyploidy nph.onlinelibrary.wiley.com/doi/10.1111/... @robinburns.bsky.social @alisondawnscott.bsky.social @pnovik.bsky.social

Every PI

I am building a new website for my group. Any suggestions of good lab websites? It would be nice to get some good ideas 😀

Amazing to receive the @hfspo.bsky.social Research Grant to pursue the project I have been dreaming of since I started my lab..!!🧬: how meiotic drive impacts sex ratios in vertebrates👩🏻‍🔬👨‍🔬 I am so fortunate to collaborate on this project with Jiri Hejnar at IMG and @amarques.bsky.social 🎉🙏🏼

Super excited to share some great news 😊 Our team has been awarded a @hfspo.bsky.social grant! We’ll be working on genetic conflict over sex ratio in vertebrates, together with @takashiakeralab.bsky.social and Jiri Hejnar. Really looking forward to this new adventure! Science is a team sport!