Leonardo Iasi
@leonardoiasi.bsky.social
130 followers 66 following 18 posts
Interested in prehistory, human evolution, population genetics and much more. Scientist @ Max Planck Institute for Evolutionary Anthropology
Posts Media Videos Starter Packs
Reposted by Leonardo Iasi
sandra-oliveira.bsky.social
Happy to share a PhD opportunity in my new lab at the University of Zurich! Application deadline: June 30. Do not hesitate to contact me for any questions!
Reposted by Leonardo Iasi
ekerdoncuff.bsky.social
Check out our dive into 50,000 years of Indian genetic history!🇮🇳
🧬~2,700 genomes
🦴Neanderthal/Denisovan DNA
🌾Hunter-gatherer, Iranian farmer & Steppe ancestry
🩺Health-linked, population-specific variants

@lauritsskov.bsky.social & Priya Moorjani
#Genomics #India #HumanEvolution #PopulationGenetics
Reposted by Leonardo Iasi
lauritsskov.bsky.social
Very excited to be part of two manuscripts which are now on biorxiv!
arxiv.org/pdf/2504.15156
www.biorxiv.org/content/10.1...

Archaic humans such as Neanderthals and Denisovans are extinct but their DNA lives on in many humans today because our ancestors met and had children with them.
arxiv.org
Reposted by Leonardo Iasi
lauritsskov.bsky.social
We ( @zeniabaek.bsky.social @moicoll.bsky.social and @asgerhobolth.bsky.social ) present a new cool way to visualize the optimal trade off for hmm decoding called Artemis plots!
arxiv.org/pdf/2504.15156
www.biorxiv.org/content/10.1...
leonardoiasi.bsky.social
Check out this great video from @stefanmilo.bsky.social discussing recent finding on the date of Neanderthal introgression and what one might learn from this about the human migration out of Africa (feat. @arevsumer.bsky.social and me).
www.youtube.com/watch?v=rXN-...
Does Neanderthal DNA put a ceiling on Out of Africa?
YouTube video by Stefan Milo
www.youtube.com
leonardoiasi.bsky.social
Co-first author Manjusha Chintalapati is also on bluesky @mchintalapati.bsky.social
leonardoiasi.bsky.social
This study was a collaboration between MPI for evolutionary anthropology and @ucberkeleyofficial.bsky.social , under the supervision of @moorjanipriya.bsky.social and @benmpeter.bsky.social, with co-first author Manjusha Chintalapati
leonardoiasi.bsky.social
We examined the distribution of Neandertal ancestry over time and found that the landscape of Neandertal ancestry, the deserts and high frequency regions, formed quickly after the gene flow supporting theoretical predictions.
leonardoiasi.bsky.social
Our data supports a single extended pulse of Neandertal gene flow that took place around 47,000 years ago, with a duration of around 7,000 years.
leonardoiasi.bsky.social
Digging deeper, we infer the timing of Neandertal gene flow per individual by studying the ancestry covariance across the genome.
leonardoiasi.bsky.social
Interestingly, the Early out of Africa individuals including Oase1, Ust’ Ishim and the Bacho Kiros have the highest unique Neandertal ancestry and significantly different matching profile to sequenced Neandertals than later modern humans- a possible indication of diversified gene flow.
leonardoiasi.bsky.social
By exploring the colocalization of Neandertal ancestry segments and contrasting it to genome-wide allele sharing, we uncovered that most (>90%) Neandertal ancestry is shared among individuals and follows the overall population structure.
leonardoiasi.bsky.social
We use genomic data from 59 ancient modern human individuals ranging between 45,000–2,200 yBP with 275 diverse present-day individuals from worldwide populations forming 16 clusters for our analysis.
leonardoiasi.bsky.social
Previous studies characterized the Neandertal ancestry segments in present-day individuals and found a non-homogeneous distribution. But how did this distribution look in the past?
leonardoiasi.bsky.social
Our research identifies a single major Neandertal gene flow event which occurred ~47,000 years ago, lasting about 6,800 years, which significantly impacted genetic diversity in non-African ancestors.