Marina Brasó-Vives's Avatar

Marina Brasó-Vives

@mbrasovives

Evolutionary genomics. Mainly duplications & amphioxus. Currently at @dee-unil.bsky.social with @marcrr.bsky.social.

34
Followers
57
Following
8
Posts
13.11.2025
Joined
Posts Following

Latest posts by Marina Brasó-Vives @mbrasovives

Preview
Chromatin spatial analysis by METALoci unveils sex-determining 3D regulatory hubs - Nature Structural & Molecular Biology METALoci, a new three-dimensional genome computational tool, reveals a major rewiring of regulatory interactions during sex determination. By combining this method with transgenic models, the authors ...

🔊💥 How is sex determined? How is it encoded in the #3Dgenome?

Read all about it in our last paper!
www.nature.com/articles/s41...

It’s been looong but feels satisfying to see this finally out.

(With CapelLab, @dariloops.bsky.social Lab and @mamartirenom.bsky.social Lab)

🧵👇

24.02.2026 14:10 👍 22 🔁 8 💬 1 📌 1
Where to Publish?

Dear all, I'm happy to present you a side project done with @diegoharta.bsky.social @phylogenetrips.bsky.social & Lucas Baudouin regarding the publication landscape in Biology: wheretopublish.github.io 1/4

10.02.2026 09:42 👍 11 🔁 7 💬 1 📌 3

If you are a scientist, working on biology, wondering where to submit your manuscript given the current issues with the academic publishing system, check out wheretopublish.github.io!
We did this thinking change is possible. Let’s make it happen!

11.02.2026 20:31 👍 7 🔁 6 💬 0 📌 0

7/7
The result: panmixia and high effective population size, helping explain how amphioxus maintain extreme genomic diversity alongside striking phenotypic stability.

20.01.2026 09:43 👍 0 🔁 0 💬 0 📌 0

6/7
This near-panmictic pattern is best explained by long-distance larval dispersal via ocean currents. Together with a wide ecological range, this dispersal leads to a very large effective population size, ultimately resulting in extraordinary heterozygosity of ~3%.

20.01.2026 09:43 👍 0 🔁 0 💬 1 📌 0

5/7
Using population genomic and phylogenetic analyses, together with comparisons to simulations, we show that despite low adult mobility and local settlement, European amphioxus populations exhibit a weak population structure that place them close to panmixia.

20.01.2026 09:43 👍 0 🔁 0 💬 1 📌 0

4/7
We used high-coverage whole-genome data from multiple individuals sampled at two distant locations (Atlantic & Mediterranean) to accurately quantify genomic diversity and investigate its evolutionary causes.

20.01.2026 09:42 👍 0 🔁 0 💬 1 📌 0

3/7
Amphioxus are fascinating chordates: despite an extremely simple and conserved phenotype—even between deeply diverged species—they harbor some of the highest levels of genomic diversity ever reported in metazoans. How can such phenotypic stability coexist with extreme genomic diversity?

20.01.2026 09:42 👍 1 🔁 0 💬 1 📌 1

2/7
Joint work with @marcrr.bsky.social, @diegoharta.bsky.social, Stéphanie Bertrand, and Hector Escrivà.

20.01.2026 09:42 👍 0 🔁 0 💬 1 📌 0
The highly heterozygous European amphioxus (Branchiostoma lanceolatum) at the edge of panmixia Amphioxus are small marine chordates that have broad ecological ranges, yet as adults form local settlements and exhibit limited mobility. Genomic surveys of two amphioxus species have suggested that they rank among the most genetically diverse metazoans. Here, we present the first accurate assessment of genomic diversity in the European amphioxus ( Branchiostoma lanceolatum ) and investigate the processes underlying this diversity. We leverage high-coverage whole-genome sequencing data from multiple individuals sampled at two geographically distant Atlantic and Mediterranean locations. Consistent with previous estimates in other amphioxus species, we measure exceptionally high genomic diversity, with an average heterozygosity of 2.73% in B. lanceolatum . Despite the large geographic separation between sampling sites, population differentiation is minimal, indicating extensive gene flow among distant adult settlements. Phylogenetic analyses combined with population genetic simulations confirm that this elevated genomic diversity is primarily driven by a large effective population size. Although adult amphioxus have limited mobility, our results indicate that long-distance larval dispersal mediated by ocean currents is sufficient to generate a near-panmictic population structure across their broad ecological range. ### Competing Interest Statement The authors have declared no competing interest. Swiss National Science Foundation, 207853 Agence Nationale de la Recherche, ANR-21-CE13-0034

1/7 🧬 New preprint!

What is it like to have one of the highest genomic diversities among metazoans?

🔗 www.biorxiv.org/content/10.6...

20.01.2026 09:40 👍 14 🔁 11 💬 1 📌 3

Very proud to share our perspective on "The Genomic Kaleidoscope" doi.org/10.1093/gbe/... out @genomebiolevol.bsky.social

Precious collaboration w/ colleagues across the world, led alongside the amazing @mbrasovives.bsky.social and the one&only @jrotwitguez.bsky.social

Check out his great thread!

17.11.2025 14:29 👍 8 🔁 3 💬 1 📌 0

👏 It really shows how powerful meetings can be for sparking ideas and collaborations —and when those turn into joint efforts like this, even greater! Thank you all for this fun adventure!

@mbrasovives.bsky.social @diegoharta.bsky.social @jrotwitguez.bsky.social @theafrogers.bsky.social et al

14.11.2025 16:35 👍 8 🔁 2 💬 0 📌 0

Thank you, Marc! 🙃

14.11.2025 14:10 👍 1 🔁 0 💬 0 📌 0
GBE | The Genomic Kaleidoscope: On the Hidden Dimensions of Within-Species Genomic Diversity

GBE | The Genomic Kaleidoscope: On the Hidden Dimensions of Within-Species Genomic Diversity

Brasó-Vives et al. publish a new Perspective in GBE, highlighting underexplored dimensions of genomic variation that contribute to phenotypic diversity beyond the DNA sequence, contributing to our understanding of genome evolution.

🔗 doi.org/10.1093/gbe/evaf204

#genome #evolution

14.11.2025 12:20 👍 17 🔁 13 💬 1 📌 2
Validate User

🔊New perspective piece out @genomebiolevol.bsky.social.

"The Genomic Kaleidoscope: On the Hidden Dimensions of Within-Species Genomic Diversity" 💡🌀🌈
doi.org/10.1093/gbe/...

Co-led with @mbrasovives.bsky.social and @diegoharta.bsky.social

Check out our thread! 🧵👇 (1/n)

14.11.2025 09:11 👍 17 🔁 12 💬 3 📌 3