Parul Johri
@johriparul.bsky.social
Population geneticist
Assistant Professor at UNC, Chapel Hill
Assistant Professor at UNC, Chapel Hill
Reposted by Parul Johri
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
We asked what maintains the striking variation in floral color, size, and shape within and among populations of Dame's Rocket, Hesperis matronalis
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...
www.biorxiv.org
December 23, 2025 at 4:05 PM
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
We asked what maintains the striking variation in floral color, size, and shape within and among populations of Dame's Rocket, Hesperis matronalis
Reposted by Parul Johri
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 🧪
We believe that, as our future leaders in biology, it is vital to provide #ECRs with the right support during the early stages of your academic career. We offer a number of practical ways to help you meet the unique needs and challenges you may encounter: www.biologists.com/about-us/ear...
Supporting early-career researchers
On these pages we highlight the range of resources that we offer to early-career researchers.
www.biologists.com
December 22, 2025 at 12:26 PM
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 🧪
Reposted by Parul Johri
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
@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
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...
www.biorxiv.org
December 22, 2025 at 3:09 PM
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
@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
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/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.
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
academic.oup.com
December 22, 2025 at 3:25 PM
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/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.
Reposted by Parul Johri
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
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
December 15, 2025 at 5:02 PM
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
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
Reposted by Parul Johri
@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/10.1093/molbev/msaf250
#evobio #molbio
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
doi.org
October 24, 2025 at 8:41 AM
@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/10.1093/molbev/msaf250
#evobio #molbio
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.
October 28, 2025 at 9:31 PM
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.
Our latest preprint about the effects of rescaling forward-in-time simulations in population genetics - www.biorxiv.org/content/10.1...
May 8, 2025 at 9:18 PM
Our latest preprint about the effects of rescaling forward-in-time simulations in population genetics - www.biorxiv.org/content/10.1...
Reposted by Parul Johri
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
doi.org/10.1093/evol...
@journal-evo.bsky.social #popgen #evobio
March 5, 2025 at 6:36 PM
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
doi.org/10.1093/evol...
@journal-evo.bsky.social #popgen #evobio
Reposted by Parul Johri
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.
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...
www.biorxiv.org
January 9, 2025 at 9:47 AM
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.
Reposted by Parul Johri
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...
@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...
November 26, 2024 at 10:19 PM
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...
@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...
Reposted by Parul Johri
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! https://buff.ly/4fNJk9k
November 25, 2024 at 2:29 AM
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! https://buff.ly/4fNJk9k