Jeff Spence

@jeffspence.github.io

assistant professor at ucsf interested in genetics, statistics, etc… jeffspence.github.io

Officially recruiting postdocs at GW. If you are interested in genetic novelty, structural variation, or evo genetics please get in touch! We have data sets on mulitple organisms with large population sizes (Drosophila, Megalonaias nervosa) and species in decline (fireflies, mussels, elephants).

In this collaboration with the Gokcumen lab, @alberaqil.bsky.social developed a method based on interchromosomal linkage disequilibrium to detect false positive trans-eQTLs, showcased on GTEx and MAGE. The approach could be used to filter other trans molecular QTLs, which may be similarly impacted.

Gokcumen Lab@gokcumenlab.bsky.social · last wk.

New paper with @rajivmccoy.bsky.social @ajhgnews.bsky.social. Bottom line: Polymorphic gene duplications absent in the reference genome can produce spurious trans-eQTLs, and we propose a method to identify these false positives. authors.elsevier.com/c/1nWChgeXHnOF

Come and join our dream team! We’re recruiting a PhD candidate with a strong background in statistics, machine learning and (human) genetics to work at the interface of biological sequence foundational models and scores polygenic score methods.

Had a great time at the #SIAM2026 in #Cleveland . Met colleagues, heard great talks, & gave a talk about "bounded environmental stochasticity drives secondary allee thresholds" based on recent JTB paper (see bsky.app/profile/seba...) Main conclusions shown below. More details in this thread. 1/n

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Sebastian Schreiber @sebastianschreiber.bsky.social · 4mo ago

A paper plagiarizing my JTB article www.sciencedirect.com/science/arti... has been officially retracted in Physica A www.sciencedirect.com/science/arti... Grateful to the editors for taking this seriously. 1/3

Save the date! The next SMTPB conference will take place May 3-6, 2027, at Stanford University. Make sure you're on the mailing list to stay in the loop for updates - reach out to info@smtpb.org.

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I just followed this advice to comment on the OMB rule changes. There are about 3 hours left before the deadline (tonight at 11:59p EDT). If you benefit from US Government-funded research make sure to get your comments in. elizabethginexi.substack.com/p/what-we-ne...

What We Need to do NEXT: OMB’s Proposed Federal Financial Assistance Rule (OMB-2026-0034)

What OMB’s Proposed Federal Financial Assistance Rule Means in Practice

elizabethginexi.substack.com

It was a lot of fun working with @nikhilmilind.dev and @jeffspence.github.io on this paper about how gene dosage relates to traits (and resolving a nice paradox along the way). Thanks Craig Smail for a great Preview article!

Jeff Spence@jeffspence.github.io · 4w ago

Craig Smail wrote up a really nice Preview of @nikhilmilind.dev's paper where we try to explain why large effect variants tend to affect traits in the same direction on average, which we think about in terms of the non-linearity of gene dosage response curves. www.cell.com/cell-genomic...

Craig Smail wrote up a really nice Preview of @nikhilmilind.dev's paper where we try to explain why large effect variants tend to affect traits in the same direction on average, which we think about in terms of the non-linearity of gene dosage response curves. www.cell.com/cell-genomic...

Gene dosage differences and non-linear impacts on complex traits

Large differences in gene dosage are usually associated with opposite phenotypic effects but show a bias toward one direction in aggregate genome wide. Milind et al. suggest that this is explained by ...

cell.com

I think this work really underscores that we are at a turning point in human genetics. There is a growing consensus that doing good research in human genetics requires an expanded skillset (including, e.g., one that can navigate the relationship between genetics, ancestry, and pop descriptors) (1/)

Jayati Sharma, PhD, ScM@jayatirsharma.bsky.social · 4w ago

In what has been a labor of love & joyful collaboration, we are super excited to share our preprint on recommendations towards the ethical and accurate use of population descriptors generated from a survey by trainees, for trainees. www.biorxiv.org/content/10.6...

I know it seems like a heretical idea, but one way to figure out if a preprint is really interesting (to you) is... to read the preprint. Then, in the spirit of sharing, send a note to authors: a simple kudos or a more detailed question. I do this a dozen times a year. It's awesome. Try it.

Come see my poster tn! For 3 yrs, populations evolved at 43 sites worldwide. I built kMate, an alignment-free, pangenome k-mer method to track SNP & SV frequencies across space & time, opening the door to accurately and efficiently mapping climate-adaptive variants on evolution experiments! #PEQG26

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