Sign in

Parul Johri

@johriparul.bsky.social
310 followers 207 following 19 posts

Population geneticist Assistant Professor at UNC, Chapel Hill

PostsRepliesMedia
Reposted by Parul Johri
Tom Booker @tombooker.bsky.social · 24/09/2026
I’m keen to share this preprint. There is growing evidence that associative overdominance leads to the maintenance heterozygosity and we wondered how this would affect variance for traits under stabilizing selection: www.biorxiv.org/content/10.6...
biorxiv.org
Maintenance of quantitative genetic variation in regions of restricted recombination via associative overdominance
Mutation-selection balance is the most plausible general mechanism for the maintenance of additive genetic variance (VA) for quantitative traits in natural populations. It is well established that the...
1188
Reposted by Parul Johri
Tom Booker @tombooker.bsky.social · 24/09/2026
UBC undergrad Yan Zhao took on this project with the support of an NSERC USRA, PhD student Chaebin Lee and great collaborators (Brian Charlesworth and @johriparul.bsky.social !!)
031
Reposted by Parul Johri
Anne Stone @acstone.bsky.social · 02/07/2026
Thanks to my terrific students and colleagues who nominated me for the #SMBE2026 lifetime achievement award. You make science fun!
Miriam Bravo, Maria Nieves-Colon, Genevieve Houseman, me, Tanvi Honap and Joanna Malukiewicz Award picture with SMBE president Juliette de Meaux
6635
Parul Johri @johriparul.bsky.social · 08/06/2026
We are actively searching for a postdoc to join the lab! Details provided here - johrilab.org/join Please share. I will be at PEQG and will be happy to chat if you're interested!
johrilab.org
Join | JohriLab
01818
Reposted by Parul Johri
Aaron Ragsdale @apragsdale.bsky.social · 03/06/2026
New from @gvbarroso.bsky.social in our lab: quantifying the relative importance of mutation rate variation and background selection to levels of diversity along the human genome.
12911
Parul Johri @johriparul.bsky.social · 04/06/2026
Our preprint, where we infer the fitness effects of new mutations in regulatory regions of the D. melanogaster genome. We find an abundance of weakly deleterious effects - www.biorxiv.org/content/10.6... Led by @adaigle.bsky.social .
biorxiv.org
0187
Reposted by Parul Johri
Adam Auton @adamauton.bsky.social · 07/05/2026
Population geneticists! Come work at 23andMe! New role just posted. 23andme.wd5.myworkdayjobs.com/23/job/Palo-...
23andme.wd5.myworkdayjobs.com
Scientist, Population Genetics
23andMe is looking for a quantitative scientist with extensive experience in population genetics and statistical modeling of human genetics data to join our R&D team. You will leverage your expert...
01213
Reposted by Parul Johri
bioRxiv Evolutionary Biology @biorxiv-evobio.bsky.social · 21/02/2025
A model for background selection in non-equilibrium populations www.biorxiv.org/content/10.1101/202…
01712
Reposted by Parul Johri
CSEE_SCEE @csee-scee.bsky.social · 08/03/2026
Happy International Women’s Day! We are grateful to the incredible women who lead (and have led) the Canadian Society of Ecology and Evolution, & to all the women ecologists & evolutionary biologists across Canada for their important work. You help make our society, country, & planet a better place!
1217
Reposted by Parul Johri
Genetics Society of America @genetics-gsa.bsky.social · 12/02/2026
In #GENETICS, Jacob Marsh, Sachin Kaushik, and @johriparul.bsky.social examine why and when rescaling of forward simulations in population genetics is not accurate, identifying pitfalls in simulation methods. buff.ly/wpzDRV9
043
Reposted by Parul Johri
Jeffrey Ross-Ibarra @jrossibarra.bsky.social · 23/01/2026
PEQG! My favorite conference ever*. Single session, fantastic talks, great discussions. Only once every 2 years. And in the best conference location too! Abstract deadline coming up Feb 5! *Disclosure: I am required to say it's the best conference because it is and I told my mom I wouldn't lie.
genetics-gsa.org
Homepage - 2026 Population, Evolutionary, and Quantitative Genetics Conference
Visit our website to learn more.
24926
Reposted by Parul Johri
Yun Deng @yundeng.bsky.social · 25/11/2025
The last work of my PhD is finally out: www.pnas.org/doi/10.1073/...! This work is about accurately estimating branch length in the Ancestral Recombination Graph (ARG), which is achieved by a really simple framework with minimal assumptions. (1/n)
pnas.org
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...
15720
Reposted by Parul Johri
Society for Molecular Biology and Evolution @official-smbe.bsky.social · 12/01/2026
The SMBE Graduate Student Excellence Award honors the best presentation at the Graduate Student Excellence symposium, which provides a forum for young investigators to showcase their exemplary research at the annual meeting. 📨 Award applications smbe2026.org/abstracts #SMBE2026
SMBE Graduate Student Excellence Award
154
Parul Johri @johriparul.bsky.social · 12/01/2026
We (with Fanny Pouyet and Brian Charlesworth) provide a theoretical perspective on rescaling forward simulations in population genetics, along with some guidelines: arxiv.org/abs/2601.05367
arxiv.org
The rights and wrongs of rescaling in population genetics simulations
Computer simulations of complex population genetic models are an essential tool for making sense of the large-scale datasets of multiple genome sequences from a single species that are becoming increa...
1157
Reposted by Parul Johri
Dr. Arun Sethuraman @arunsethuraman.bsky.social · 07/01/2026
I wrote a short op-ed in @genetics-gsa.bsky.social G3 this month’s issue on missing data problems in population genomics that I’ve been thinking about for a couple of years. Lemme know your thoughts! Comments/suggestions/ideas welcome! doi.org/10.1093/g3jo...
doi.org
The missing data problem in population genomics and statistical methods to address them
The “Missing Data” problem is prevalent across all statistical inference, owing to the “absence of some part of a familiar data structure” (Efron 1994). Po
0148
Parul Johri @johriparul.bsky.social · 07/01/2026
We wrote a perspective piece about important considerations when building an evolutionary baseline model for population genomic inference in the deadliest malaria parasite- Plasmodium falciparum. www.biorxiv.org/content/10.6...
biorxiv.org
Towards an evolutionary baseline model of Plasmodium falciparum for population-genomic inference
Malaria has caused over 15.7 million deaths in the 21st century and was responsible for ∼600 thousand deaths globally in 2023 alone. Although many effective antimalarial drugs have been developed and ...
141
Reposted by Parul Johri
Gina Baucom @gbaucom.bsky.social · 23/12/2025
A final new paper out from the lab, work from Steve Johnson, @joannarifkin.bsky.social & @stepheniwright.bsky.social We asked what maintains the striking variation in floral color, size, and shape within and among populations of Dame's Rocket, Hesperis matronalis
biorxiv.org
Color, size, shape: The drivers of floral variation in Hesperis matronalis (Dame’s Rocket)
Evolutionary biologists have long been intrigued by the factors that sustain genetic and phenotypic variation within and among natural populations. Polymorphisms underlying components of floral displa...
11710
Reposted by Parul Johri
Mark Peifer (He, him) @peiferlabunc.bsky.social · 22/12/2025
I'm on the Board of @biologists.bsky.social. Many know them as publishers of @dev-journal.bsky.social, @jcellsci.bsky.social, @jexpbiol.bsky.social , DMM, and @biologyopen.bsky.social --but they also are a major funder of small grants that empower young biologists and enable scientific meetings 🧪
06421
Reposted by Parul Johri
Molly Przeworski @mollyprz.bsky.social · 22/12/2025
Happy to highlight an essay I wrote together with @marcdemanuel.bsky.social, @natanaels.bsky.social and Anastasia Stolyarova, trying to think through what sets the mutation rate of a cell type in an animal species: www.biorxiv.org/content/10.6... 1/n
biorxiv.org
What sets the mutation rate of a cell type in an animal species?
Germline mutation rates per generation are strikingly similar across animals, despite vast differences in life histories. Analogously, in at least one somatic cell type, mutation rates at the end of l...
212663
Parul Johri @johriparul.bsky.social · 22/12/2025
Now accepted in Genetics! academic.oup.com/genetics/adv... We ask why and when rescaling of forward simulations in population genetics is not accurate. There are some interesting results for people performing simulations with selection.
academic.oup.com
Effects of rescaling forward-in-time population genetic simulations
Abstract. Forward-in-time population genetic simulations enable modelling of a wide array of complex evolutionary scenarios. Simulating small genomic regio
02314
Reposted by Parul Johri
Genetics Society of America @genetics-gsa.bsky.social · 15/12/2025
The December episode of Genetics in Your World is now live!🎙️ ECS Multimedia Subcommittee member Debraj Manna interviewed Dr. Matthew Rockman (@wormsrock.bsky.social) of New York University about inbreeding depression in C. elegans. Listen now: buff.ly/7DVBt56
041
Reposted by Parul Johri
Molecular Biology and Evolution @molbioevol.bsky.social · 24/10/2025
@lntran.bsky.social @castellanoed.bsky.social @ryangutenkunst.bsky.social introduce a systematic permutation approach for interpreting haplotype matrix-based methods in population genomics. 🔗 doi.org/10.1093/molbev/msaf250 #evobio #molbio
doi.org
Interpreting Supervised Machine Learning Inferences in Population Genomics Using Haplotype Matrix Permutations
Abstract. Supervised machine learning methods, such as convolutional neural networks (CNNs), that use haplotype matrices as input data have become powerful
075
Parul Johri @johriparul.bsky.social · 28/10/2025
The Johri Lab has an open postdoc position. Please send me an email, if interested. Start date is flexible. Please do share! Thank you in advance.
02337
Parul Johri @johriparul.bsky.social · 08/05/2025
Our latest preprint about the effects of rescaling forward-in-time simulations in population genetics - www.biorxiv.org/content/10.1...
193
Reposted by Parul Johri
Austin Daigle @adaigle.bsky.social · 05/03/2025
Excited to share my first PhD project with my mentor, @johriparul.bsky.social! We examine how Hill–Robertson interference (HRI) in highly selfing species biases estimates of the distribution of fitness effects of new mutations (DFE). doi.org/10.1093/evol... @journal-evo.bsky.social #popgen #evobio
12110
Reposted by Parul Johri
David Castellano @castellanoed.bsky.social · 09/01/2025
Short thread on my updated work with @gutengroup.mcb.arizona.edu "Detection of Domestication Signals through the Analysis of the Full Distribution of Fitness Effects", latest version at: www.biorxiv.org/content/10.1... Here we simulate a kind of canonical and idealised domestication process.
biorxiv.org
Detection of Domestication Signals through the Analysis of the Full Distribution of Fitness Effects
Domestication is a process marked by complex interactions between demographic changes and selective pressures, which together shape genetic diversity. While the phenotypic outcomes of domestication ar...
11410
Reposted by Parul Johri
Mike Barker @barkerms.bsky.social · 26/11/2024
Come join us in Tucson!! I am excited to announce a tenure track faculty position on the genomics of resilience @uofa-eeb.bsky.social! Read more about the position in the updated link below! We will begin reviewing applications on December 9! arizona.csod.com/ux/ats/caree...
A photo of the Sonoran Desert at night with a saguaro cactus in the foreground with the top glowing from the moonlight. A field of stars is visible in the sky behind the cactus.
114190
Reposted by Parul Johri
Society for the Study of Evolution @sse-evolution.bsky.social · 25/11/2024
Nominations due soon for the 2025 Dobzhansky Prize! This award recognizes the accomplishments and future promise of an outstanding early-career evolutionary biologist. Submit your nomination now! buff.ly/4fNJk9k
Text: Society for the Study of Evolution Dobzhansky Prize, to recognize the accomplishments and future promise of an outstanding early-career evolutionary biologist, nominations due December 1, 2024.
03938