Alison Feder

@alisonfeder.bsky.social

Rapid evolutionary dynamics in viruses, cancer and bacteria. Assistant professor at UW Genome Sciences and Freeman Hrabowski Scholar at HHMI. federlab.github.io

Thrilled to post thread re: new single-cell lineage of mouse embryo reconstructed w/ DNA Typewriter. One animal, zygote to late organogenesis (E13.5). Tree has 1,340,794 transcriptionally profiled, annotated tips (cells), 1,142,588 dated internal nodes, rooted at zygote 1/n

Cannot be more excited about the lineup for the inaugural Function of Evolving Systems GRC conference I am co-organizing with the amazing Joy Bergelson. Less than a month away: August 9 - 14, 2026. Still a few spots left! And do check out the amazing list of speakers: www.grc.org/function-of-...

2026 Function of Evolving Systems Conference GRC

The 2026 Gordon Research Conference on Function of Evolving Systems will be held in Waterville Valley, New Hampshire. Apply today to reserve your spot.

grc.org

Genuine question for folx who look at bacterial phylogenies: How do you interpret the bootstrap support and posterior probabilities that you get on your tree estimates? Do you take them seriously? Do you think: "Wow, all 99%, that must be a reliable tree!"? 1/

What if an embryo made immune cells before it finished building the tissue they usually come from? In our new preprint, we show that annual killifish embryos specify neutrophils before germ layers are fully resolved. www.biorxiv.org/content/10.6... Huge thanks to my PI, @ohnolog.bsky.social ! 🧵

Early immune cell development precedes gastrulation in annual killifish

During embryogenesis, cell types arise in a predictable order because developmental regulators act sequentially. But how evolutionary changes in morphogenesis reshape the signaling environments that a...

biorxiv.org

Two pleas from a journal editor: 1. If you're mid-career or senior and are declining a review, please recommend a junior colleague. 2. If you're early-career and want to be asked to review papers, please ensure editors can readily discover your expertise, current affililation, and email address.

Excited that Elena Romero is speaking about HIV intra-host evolution in the Crow Award session today at #PEQG26! Her talk focuses on her recent paper (www.pnas.org/doi/10.1073/...) and unpublished follow up work asking what diversity and linkage signatures look like for "ultra-soft" sweeps!

PNAS

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

pnas.org

I’m excited to share a new paper about HIV escape from broadly neutralizing antibody monotherapies! In it, we describe the most highly recurrent adaptation I have ever seen. A close collaboration with Lillian Cohn (FHCC) led jointly by Elena Romero and Abby Clyde. www.pnas.org/doi/10.1073/...

PNAS

Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...

pnas.org

Excited to announce that we are moving the lab to Minneapolis to join the University of Minnesota Department of Microbiology & Immunology and Institute on Infectious Diseases this summer!! We will be hiring so please reach out if interested in viral evolution, viral immunology, etc.!!

Sunset view of the Mississippi river and beautiful downtown Minneapolis

Happy to share the final version of @oliviamghosh.bsky.social's paper on inferring low dimensional phenotype-fitness maps from high-throughput fitness measurements across environments. Fun collaboration with @oliviamghosh.bsky.social, @grantkinsler.bsky.social, & @petrovadmitri.bsky.social

PLOS Biology@plosbiology.org · 4mo ago

Predicting the effect of a #mutation on #fitness is hard. @oliviamghosh.bsky.social @petrovadmitri.bsky.social &co use fitness effects of adaptive yeast mutants to show that underlying genotype-phenotype-fitness maps are low-dimensional but context-dependent @plosbiology.org 🧪 plos.io/4dLy2Ez

Two models for the nature of pleiotropy in adaptation. Left: Schematic of the environmental structure in this study. Environments can be mapped onto a multidimensional environment space characterized by chemical and physical compositions. The large green circle represents an environment where adaptive mutants evolved, and the large pink circle is a distant environment. Around each base, a set of identical environmental perturbations (arrows) is applied, generating clusters of similar environments around distinct base environments. Top right: Schematic of fitnotype map for adaptive mutants near their home base environment. By measuring fitness in each of the green environments, one can infer how many fitnotypes matter for this set of mutants in their home environment. Here, only four of the possible 8 fitnotypes matter. Bottom right: When the mutants are moved to the distant base environment, and their fitness is measured in all pink environments (base and perturbations), there are two possibilities. Either more fitnotypes become important and the space appears higher-dimensional (left, pleiotropic expansion), or the set of fitnotypes that matters remains low-dimensional, but shifts (right, pleiotropic shift).