Julio Rozas

Genome Size Reduction Under Non-Adaptive Evolution: How Evolution Halved Genome Size During an Oceanic Island Radiation. Today talk by Sara Guirao-Rico in #eseb2025 congress, and accepted ms. in MBE academic.oup.com/mbe/advance-ar…

The differences in personality. 😂😂 Which one are you? Me first!

Happy to share that my project on ant brain evolution has been awarded a Lundbeck Foundation Experiment grant 🎉

Nos cuenta Julio Rozas, nuestro socio del mes cómo empezó su viaje en la genética, recordando grandes libros y maestros que le inspiraron en el camino. 🌟 Lee su entrevista completa: segenetica.es/socio-del-mes-…

📣📣📣PhD position available in my lab at @mncn_csic in Madrid to study speciation mechanisms in oceanic island birds, using phenotypic and genomic data. - 💰4-year contract - 🎓Biol, Genetics, Master's, English. - 📅Apply by October 15 -👉CV & letter to b.mila@csic.es

#NotíciaIRBio 🪶Un nou estudi analitza la hibridació entre la baldriga balear i la baldriga mediterrània i el seu impacte en la diversitat genòmica, clau per a millorar les estratègies de conservació 🔗shorturl.at/ss6rL @SeabirdEcology @JRozasUB 📷KirkZuflet #Biodiversitat

🪶Nova publicació a @PNASNews : L'hibridació ha ajudat la baldriga balear a sobreviure. 🧬Aquest estudi, liderat per @GeneticsUB, ha estat possible gràcies al 1r genoma de referència d'aquesta espècie seqüenciat en el marc del CBP! Llegeix la notícia👉 biogenoma.cat/la-hibridacio-…

10/10 None of this work would have been possible without the contribution of all our great collaborators and coauthors: @ccuevascab, @cescogian, @josephine_paris, @Karen_Seabirds, @emitruc, Jacob González-Solís, @MRiutortUB, @JoanFerrerObiol & @JRozasUB!

9/10 Overall, our research underscores the need to incorporate hybridization and its contribution to evolutionary resilience in future conservation plans for endangered taxa. (Photo by Víctor París📸)

8/10 Through forward simulations we show that protecting the hybrid colonies will safeguard the genetic diversity of the Balearic shearwater under potential bottlenecks in the long run. However, mitigating bycatch-linked mortality should still be the nº1 conservation priority.

7/10 We observe a lack of differences in genetic diversity and genetic load among shearwater populations, which we attribute to the pervasiveness of gene flow between them. Hybridization has prevented #inbreeding in the collapsing populations of Balearic shearwaters!

5/10 We show that Balearic-Yelkouan introgression permeates throughout both species’ ranges. Nevertheless, it is most prominent in the islands where the ranges of both species meet: Menorca and Cabrera.

4/10 We uncover a complex demographic history shaped by periods of isolation during glacial maxima and widespread hybridization during interglacial periods. The latter explains the near lack of differentiation between these 2 shearwater taxa at the genomic level!

3/10 Five years ago we set out to explore the role of hybridization between the Critically Endangered Balearic shearwater and the Yelkouan shearwater using whole-genome resequencing data. After years of hard work, we’re glad to share our results in this thread!

2/10 #Hybridization has been traditionally viewed as a negative evolutionary force in many conservation contexts. Recent work is starting to challenge this idea, highlighting how introgression can increase a species’ genetic diversity and adaptive potential.

1/10 We are thrilled to announce that our new paper on conservation genomics of the Balearic shearwater has just been published online at @PNASNews! pnas.org/doi/10.1073/pn…

#eseb2025 has started. So many friends and colleagues around. This is amazing. Welcome everyone to Barcelona!

Our article about the adaptive radiation and social evolution of the ants is now out in Cell! We analyze 163 ant genomes to explore the evolution of these amazing social insects 🐜 Check it out: doi.org/10.1016/j.cell…

🧬 Se vienen cositas! Reunion de la Junta Directiva de la @segenetica en la Fac. Ciencias Biologicas @unicomplutense - ultimando los detalles del congreso de la SEG en Cartagena! 👇 seg2025.segenetica.es

Hace una semana fallecía Don Pedro Ripoll Quintas, destacado genetista y miembro de la "Escuela de Genética de Madrid", Alberto Ferrús, expresidente de la #SEG ha querido honrar su memoria con este emotivo obituario. ➡️ Léelo aquí: segenetica.es/homenajes/