Sign in

André Marques

@amarques.bsky.social
2.4K followers 1.3K following 183 posts

A lover of chromosome biology 🧬🔬🔎 Studying (not only) meiosis, centromeres & genome evolution in plants! Group leader at MPI for Plant Breeding Research in Cologne, Germany Lab website: www.mpipz.mpg.de/5028512/marques

PostsRepliesMedia
André Marques @amarques.bsky.social · 24/09/2026
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.com
A plant that reproduces sexually but has clone-like offspring
Only seeds that replicate the parental combination of chromosomes remain viable.
064
Reposted by André Marques
Nature @nature.com · 22/09/2026
Nature ersearch paper: Sex without crossovers mimics clonal reproduction in Rhynchospora tenuis go.nature.com/3UXKc6g
go.nature.com
Sex without crossovers mimics clonal reproduction in Rhynchospora tenuis - Nature
Rhynchospora tenuis undergoes obligate, genome-wide achiasmy in both male and female meiosis.
0166
Reposted by André Marques
Ben Parker @ben-parker.bsky.social · 21/09/2026
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/...
pnas.org
Phenotypic divergence is driven by mobile genetic elements in a heritable insect symbiont | PNAS
Heritable microbes profoundly influence insect biology, yet the traits they confer often evolve rapidly and differ among closely related symbiont s...
29345
Reposted by André Marques
Harmit Singh Malik @harmitmalik.bsky.social · 21/09/2026
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
apply.interfolio.com
Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
13730
Reposted by André Marques
Eelco Tromer @eelcotromer.bsky.social · 10/12/2025
#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
0131
Reposted by André Marques
Soni Lacefield @lacefieldlab.bsky.social · 21/08/2026
Excited to share this review that @needhibhalla.bsky.social and I wrote on meiotic checkpoints! www.annualreviews.org/content/jour...
annualreviews.org
Tuning Meiotic Checkpoints: Evolutionary Costs and Mechanistic Trade-Offs
In this review, we discuss three meiotic checkpoints—the DNA damage response, the pachytene checkpoint, and the spindle checkpoint—and highlight their similarities and differences across diverse syste...
03220
André Marques @amarques.bsky.social · 20/09/2026
This looks like an awesome review! Looking forward to reading it 🙌 congratulations @needhibhalla.bsky.social and @lacefieldlab.bsky.social
265
André Marques @amarques.bsky.social · 19/09/2026
Our new paper in collaboration with @brandgefahr.bsky.social and the RinkLab www.nature.com/articles/s41...
nature.com
Stepwise emergence of recombination suppression precedes fissiparous asexuality in the planarian Schmidtea mediterranea - Nature Communications
Asexuality has evolved many times in planarians, but its genomic basis is unknown. This study shows that in the species S. mediterranea, a series of chromosomal rearrangements in a sexual an...
082
Reposted by André Marques
Max Planck Institute for Plant Breeding Research @mpipz.bsky.social · 16/09/2026
📣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
Jobdescription
01418
Reposted by André Marques
Hadrien Oliveri @hadrienoliveri.bsky.social · 10/06/2026
🚨 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
cambridge.org
Towards a hydromechanical theory of plant active matter | Quantitative Plant Biology | Cambridge Core
Towards a hydromechanical theory of plant active matter
0103
André Marques @amarques.bsky.social · 19/09/2026
Top 1% in @qedscience.bsky.social is now officially published in @nature.com
020
Reposted by André Marques
André Marques @amarques.bsky.social · 16/09/2026
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...
916368
Reposted by André Marques
Polina Novikova @pnovik.bsky.social · 16/09/2026
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:
biorxiv.org
The Nature of Centromeric Repeat Turnovers in the genus Arabidopsis
Centromeres are critical for accurate segregation of chromosomes and are often composed of megabases of tandemly arranged satellite repeats. Yet, despite their conserved function, the DNA sequence of ...
22721
Reposted by André Marques
BehavEcolPapers @behavecolpapers.bsky.social · 18/09/2026
Sex without crossovers mimics clonal reproduction in Rhynchospora tenuis @Nature.com
dlvr.it
Sex without crossovers mimics clonal reproduction in Rhynchospora tenuis
Nature, Published online: 16 September 2026; doi:10.1038/s41586-026-11057-7Rhynchospora tenuis undergoes obligate, genome-wide achiasmy in both male and female meiosis.
0115
André Marques @amarques.bsky.social · 18/09/2026
www.derstandard.de/story/300000...
derstandard.de
Pflanze aus Brasilien stellt Lehrbuchwissen über Sinn der Sexualität infrage
Die Schnabelriede vermehrt sich zwar geschlechtlich, doch die Nachkommen sind praktisch identisch mit der Mutter. Das könnte für die Pflanzenzucht interessant werden
041
Reposted by André Marques
Science X / Phys.org @sciencex.bsky.social · 16/09/2026
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
phys.org
Brazilian sedge reproduces sexually but without DNA reshuffling, producing genetic clones
Sexual reproduction usually reshuffles genetic information, creating offspring that differ from their parents. But one small plant takes an unexpected route.
072
André Marques @amarques.bsky.social · 17/09/2026
Brazilian sedge reproduces sexually but without DNA reshuffling, producing genetic clones phys.org/news/2026-09... via @phys.org.web.brid.gy
phys.org
Brazilian sedge reproduces sexually but without DNA reshuffling, producing genetic clones
Sexual reproduction usually reshuffles genetic information, creating offspring that differ from their parents. But one small plant takes an unexpected route. In a new study published in Nature, an int...
041
Reposted by André Marques
Max Planck Institute for Plant Breeding Research @mpipz.bsky.social · 17/09/2026
📣📣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...
nature.com
Sex without crossovers mimics clonal reproduction in Rhynchospora tenuis - Nature
Rhynchospora tenuis undergoes obligate, genome-wide achiasmy in both male and female meiosis.
04319
Reposted by André Marques
Dorota Paczesniak @dorotdesigns.bsky.social · 16/09/2026
I can help you illustrate your research with effective figures, graphical abstracts, and infographics Drawing to explain and inspire linktr.ee/dorotdesigns
linktr.ee
Dorota Paczesniak Official: Instagram | Linktree
I’m a freelance scientific illustrator and consultant with a background in evolutionary biology | Drawing to explain and inspire
061
Reposted by André Marques
Dorota Paczesniak @dorotdesigns.bsky.social · 16/09/2026
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
A scientific illustration showing the life cycle of a plant Rhynchospora tenuis.

Figure caption:
Schematic representation of the R. tenuis life cycle (2n = 4). Both male and female meiosis proceed without crossovers (achiasmatic inverted meiosis). Male gametogenesis is asymmetric, yielding a single functional sperm nucleus and non-Mendelian segregation. Fertilization restores the diploid state with intact haplotypes, but only heterozygous seeds develop into viable embryos, ensuring faithful restoration of the highly heterozygous parental genome each generation.

Fig. 5: Life cycle of R. tenuis (PECP-48 genotype) under achiasmatic meiosis. 
From: Sex without crossovers mimics clonal reproduction in Rhynchospora tenuis https://doi.org/10.1038/s41586-026-11057-7
1123
André Marques @amarques.bsky.social · 16/09/2026
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...
916368
André Marques @amarques.bsky.social · 03/08/2026
New preprint from the lab!
052
Reposted by André Marques
bioRxiv Genetics @biorxiv-genetic.bsky.social · 30/06/2026
Haplotype-specific chromosome painting unveils recombination patterns in the holocentric species Rhynchospora breviuscula H.Pfeiff. www.biorxiv.org/content/10.64898/20…
031
Reposted by André Marques
PlantEvolution 🌱🌾 @plantevolution.bsky.social · 06/07/2026
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...
novonordiskfoundationprize.com
The Novo Nordisk Foundation Prize
Our prizes are awarded to researchers who have contributed to scientific breakthroughs or in other ways distinguished themselves within natural or medical science.
12126
Reposted by André Marques
USP - Universidade de São Paulo @uspoficial.bsky.social · 02/07/2026
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
jornal.usp.br
Projeto da USP doa mais de 3 mil espigas de milho para entidades assistenciais em Piracicaba
Projeto de extensão da Escola Superior de Agricultura Luiz de Queiroz da USP une agricultura sustentável e solidariedade ao beneficiar 12 entidades assistenciais de Piracicaba
0152
Reposted by André Marques
Thorsten Langner @thorstenlangner.bsky.social · 01/07/2026
‼️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...
35067
Reposted by André Marques
Claudia Köhler @claudiakohler11.bsky.social · 01/07/2026
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!
04645
Reposted by André Marques
Johann Confais @johannconfais.bsky.social · 30/06/2026
Let s dive into the world of holocentric chromosomes with @amarques.bsky.social Wonderful talk ! #smbe2026
183
André Marques @amarques.bsky.social · 28/06/2026
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!
041
André Marques @amarques.bsky.social · 24/06/2026
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...
230
Reposted by André Marques
Oded Rechavi @odedrechavi.bsky.social · 23/06/2026
Time from submission to acceptance: 3 UK Prime Ministers.
712613
Reposted by André Marques
Oded Rechavi @odedrechavi.bsky.social · 22/06/2026
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
0113
Reposted by André Marques
Oded Rechavi @odedrechavi.bsky.social · 22/06/2026
Big week! Wednesday: "The 1%" (Wait for it!) Thursday: Traveling to Australia
062
Reposted by André Marques
Society for Molecular Biology and Evolution @official-smbe.bsky.social · 08/06/2026
#SMBE2026 S11: The evolution of recombination landscapes 🗓️ Tue Jun 30, 3:50pm 🔗 smbe2026.org/programme
SMBE2026 | S11: The evolution of recombination landscapes
122
Reposted by André Marques
Society for Molecular Biology and Evolution @official-smbe.bsky.social · 08/06/2026
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
011
Reposted by André Marques
Molecular Plant & Plant Communications @mplantpcom.bsky.social · 22/05/2026
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)
074
Reposted by André Marques
CEPLAS - Cluster of Excellence on Plant Sciences @ceplas.bsky.social · 22/05/2026
🌱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! 😉
074
Reposted by André Marques
CEPLAS - Cluster of Excellence on Plant Sciences @ceplas.bsky.social · 21/05/2026
🌱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
1115
André Marques @amarques.bsky.social · 21/05/2026
Happy to be selected as finalist!
281
Reposted by André Marques
New Phytologist @newphyt.bsky.social · 15/04/2026
✨ 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
Fig. 1 Alternative routes to allopolyploid origin.
1168
Reposted by André Marques
Oded Rechavi @odedrechavi.bsky.social · 03/04/2026
Every PI
731048
André Marques @amarques.bsky.social · 30/03/2026
I am building a new website for my group. Any suggestions of good lab websites? It would be nice to get some good ideas 😀
331
Reposted by André Marques
Takashi Akera Lab @takashiakeralab.bsky.social · 26/03/2026
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 🎉🙏🏼
2182
André Marques @amarques.bsky.social · 25/03/2026
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!
4336
André Marques @amarques.bsky.social · 15/03/2026
Beautiful work from @piotraz.bsky.social and team!
040
Reposted by André Marques
Maxim Greenberg @maxvcg.bsky.social · 09/03/2026
Very excited to announce the FIRST symposium on epigenome editing! These tools are becoming widely used in mol bio, ag & therapy. It's time to bring leaders together to discuss this rapidly growing and exciting field. And why not in Paris! Please register & share! (1/2) ctrlepiedit.sciencesconf.org
Flyer for symposium: https://ctrlepiedit.sciencesconf.org/
38758
Reposted by André Marques
Polina Novikova @pnovik.bsky.social · 04/03/2026
I am happy to announce the launch of a new Arabidopsis genomics resource! Check out arabidopsislyrata.org Now you can easily look at the natural genetic variation across the entire species range of A. lyrata and A. arenosa.
arabidopsislyrata.org
Home | Alyrata Resource
15435
André Marques @amarques.bsky.social · 27/02/2026
Nothing like a delicacy from Brazil with GMO corn and soy bean 😅
030
Reposted by André Marques
Luca Soldini @lucasoldini.bsky.social · 24/02/2026
Interested in the molecular mechanisms and evolution of atypical reproductive modes ? Since 2025, we are running a (bi)-monthly online series. You can join us to watch or present! More information : tinyurl.com/EvoRepro Sign-up to our mailing list : go.unil.ch/QYYNa
243
Reposted by André Marques
Team Thomma @teamthomma.bsky.social · 14/02/2026
📣 Our latest story just dropped on bioRxiv:: A structurally unique effector shared between Verticillium dahliae and Fusarium oxysporum is involved in cotton defoliation and virulence on other hosts www.biorxiv.org/content/10.6... 🧵
biorxiv.org
34630