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Greg Owens

@gregowens.bsky.social
1.8K followers 1.6K following 48 posts

Assistant Professor of Biology at the University of Victoria. Plant genomics and plant genomics jokes

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Greg Owens @gregowens.bsky.social · 16/09/2026
This is a great opportunity to do some cool genomics and tackle some real conservation questions. Please reach out if you’re interested!
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Anna Tigano @annatigano.bsky.social · 15/09/2026
If you are interested in applied conservation and management genomics of marine critters and would like to apply for a Liber Ero fellowship this fall get in touch to discuss potential projects with me (Fisheries and Oceans) and Greg Owens (UVic). @gregowens.bsky.social
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Greg Owens @gregowens.bsky.social · 13/08/2026
This is really great! Do you sell prints online?
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Greg Owens @gregowens.bsky.social · 03/07/2026
It feels a bit anticlimactic in the end, but I'm happy to announce that I'm now an associate professor! I would say I'm updating my email signature, but I never got around to making one in the first place.
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Greg Owens @gregowens.bsky.social · 24/06/2026
I’m always impressed with the cool genomics stories coming out of Wes’ lab. This would be cool job for facilitating genomics on a scale beyond most academic labs
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New Phytologist @newphyt.bsky.social · 03/06/2026
Spatial inference of ancestor locations suggests northern refugia for canopy-forming #kelps in the Pacific Northwest Jordan B. Bemmels, et al. nph.onlinelibrary.wiley.com/doi/10.1111/... @gregowens.bsky.social #PlantScience #phylogeography
Population genetic structure in the Pacific Northwest for Nereocystis and Macrocystis.
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Greg Owens @gregowens.bsky.social · 20/05/2026
UVic is hiring a Terrestrial Plant Ecologist Assistant Professor! Come join our department! We're nice and Victoria is awesome. www.uvic.ca/science/biol...
uvic.ca
Faculty Position in Terrestrial Plant Ecology - University of Victoria
Department: Biology                 &am...
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Greg Owens @gregowens.bsky.social · 24/04/2026
I'm looking to sponsor an applicant for a Canada Impact+ Postdoctoral fellowship in my lab. The project will explore how methylation patterns change during aging in rockfish with rapidly evolved lifespan differences. Check out tinyurl.com/impactpostdoc for a description. DM for more details.
tinyurl.com
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Greg Owens @gregowens.bsky.social · 10/04/2026
Me trying to get a handle on the Quercus phylogeny
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Moi Expósito-Alonso (MOILAB) @mexpositoalonso.bsky.social · 26/03/2026
Our new experimental evolution study across 30+ locations using the plant Arabidopsis thaliana —— we direct "see" adaptation and extinction to different climates at the genetic as it happens! Read it in Science dx.doi.org/10.1126/scie... @ucberkeleyofficial.bsky.social @hhmi-science.bsky.social
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Rachel Nuwer @rachelnuwer.bsky.social · 22/01/2026
With most psychedelic drugs, you never know what you're going to get. But this mysterious mushroom from China - without fail - causes users to hallucinate tiny people: crawling up walls, popping out from under furniture and marching under doors. www.bbc.com/future/artic...
bbc.com
'They saw them on their dishes when eating': The mushroom making people hallucinate dozens of tiny humans
Only recently described by science, the mysterious mushrooms are found in different parts of the world, but they give people the same exact visions.
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Nathan Kalman-Lamb @nkalamb.bsky.social · 21/11/2025
I literally could not stop myself from inappropriately laughing out loud for real
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Greg Owens @gregowens.bsky.social · 06/11/2025
Does anyone know of a method for testing GO enrichment in the context of the genome structure? For example, I have a highly significant GO category because my significant windows hit a cluster of 8 copies of a gene family. I could do a permutation, but seems like there must be a better way.
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Justin Merondun @merondun.bsky.social · 30/10/2025
Our new @science.org paper is out! Cuckoos and hosts are locked in a coevolutionary arms race over egg mimicry. But how are these egg types inherited, and could this drive speciation? We sequenced hundreds of genomes to find out! doi.org/10.1126/scie... 🧵1/6
doi.org
Genomic architecture of egg mimicry and its consequences for speciation in parasitic cuckoos
Host-parasite arms races facilitate rapid evolution and can fuel speciation. Cuculus cuckoos are deceptive egg mimics that exhibit a broad diversity of counterfeit egg phenotypes, representing host-ad...
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Justin Merondun @merondun.bsky.social · 30/10/2025
This was the product of a decade of work, led by Jochen Wolf @jochenwolflab.bsky.social) and kick-started by @frodefossoy.bsky.social & Bård Stokke, made possible by field teams from dozens of countries! @rytikerttunen.bsky.social @biosulc.bsky.social @btobirds.bsky.social @gregowens.bsky.social
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Greg Owens @gregowens.bsky.social · 13/10/2025
media.tenor.com
a man wearing glasses says " yeah yeah but your scientists were so preoccupied with whether or not they could
ALT: a man wearing glasses says " yeah yeah but your scientists were so preoccupied with whether or not they could
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Greg Owens @gregowens.bsky.social · 01/09/2025
It really highlights to me how car-centric design makes everything so much worse for general living.
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Greg Owens @gregowens.bsky.social · 01/09/2025
These homes were built in 1999, originally surrounded by forest. The globe and mail wrote a story about them 8 years later, once the rest of the neighbourhood filled in. vibrantvictoria.ca/forum/index....
zoom in on neighbourhood.
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Greg Owens @gregowens.bsky.social · 01/09/2025
I want to highlight the weirdest neighbourhood in Greater Victoria. In Langford, if you take exit #15 you enter a 6-lane road surrounded by a classic mix of strip malls and big box stores. Nestled of all of this, accessible only through a parking lot, is a small street of 16 single family homes.
Google maps of neighbourhood in langford
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Greg Owens @gregowens.bsky.social · 11/08/2025
distracted boyfriend meme. I'd rather check my snakemake script progress for the 100th time than start reviewing a paper
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Jenny Jandt (she/her) @thewasplady.bsky.social · 19/05/2025
Get your CVs updated. Zoology Department, University of Otago is hiring a Lecturer in Evolutionary Ecology! @zoologyotago.bsky.social otago.taleo.net/careersectio...
otago.taleo.net
Lecturer/Pūkenga - Evolutionary Ecology
Click the link provided to see the complete job description.
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Tyler Kent @tylervkent.bsky.social · 07/04/2025
Excited to see the final version of this paper with @samurscicop.bsky.social and Daniel Matute out in @genomebiolevol.bsky.social! We took a dive into the complicated demographic history of Aedes aegypti mosquitoes and its impact on the distribution of genetic diversity doi.org/10.1093/gbe/...
doi.org
Demographic history, genetic load, and the efficacy of selection in the globally invasive mosquito Aedes aegypti
Abstract. Aedes aegypti is the main vector species of yellow fever, dengue, Zika and chikungunya. The species is originally from Africa but has experienced
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Darren Irwin (he / him) @darrenirwin.bsky.social · 17/03/2025
OK who's ready for some science? Do you like speciation? Genomics? Hybridization? Bioinformatics? Then this is for you: Published today: "The Distribution & Dispersal of Large Haploblocks in a Superspecies" Bonus interest if you like ring species and cute greenish birds: doi.org/10.1111/mec....
Four figure panels from the paper. At upper left, a map of Asia showing the breeding ranges of six subspecies of greenish warblers, five of which are in the main ring: viridanus in blue in west Siberia, ludlowi in green in the western Himalayas, trochiloides in yellow in the central and eastern Himalayas, obscuratus in orange in central China, plumbeitarsus in red in eastern Siberia. The western form nitidus in grey, is also shown. In the lower left panel is a plot of genomic PC1 vs. PC2, with each little diamond symbol representing a single bird. This shows viridanus and plumbeitarsus as very distinct, while being connected by gradual or stepwise change through the populations around the southern ring. This is also shown in the lower central panel, which plots location around the ring vs. PC1. In the right panel, genotypes at 12 different Large Haploblock Regions are shown for 257 individuals arranged in order around the ring. Distinct differences between viridanus (in blue) and plumbeitarsus (in red) are seen, with more gradual variation through the ring connecting them. A single backcross of an F1 and a plumbeitarsus is seen in the lower row of this panel.
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Randall Munroe @xkcd.com · 17/03/2025
Lungfish xkcd.com/3064
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KamilSJaron.bsky.social @kamilsjaron.bsky.social · 14/02/2025
With @katiejenike.bsky.social and a bunch more of our fellow k-mer enthusiasts, we put together a manuscript on k-mers in biodiversity genomics. A guide if you will, that covers k-mers from basics to some really funky stuff... genome.cshlp.org/content/35/2...
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Greg Owens @gregowens.bsky.social · 11/02/2025
Does anyone have an insight into why overhead rates are so different between US and Canada? Canadian rates are generally around 25%. Is it that Canada just provides more government base funding so they can accept lower overhead rates?
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Chris Neufeld @cneufeld.bsky.social · 03/02/2025
Excited to see our work on the cover of Current Biology this month! Read about it in the thread below. 🧪🦑🌊
The cover of the scientific journal Current Biology, showing a photo by Fernando Lessa of a solitary giant kelp frond rises out of the depths in the foreground, with more kelp in the background.
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Greg Owens @gregowens.bsky.social · 19/01/2025
My population isn’t working for QTL mapping. RIL issue.
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Greg Owens @gregowens.bsky.social · 17/01/2025
Also thank you to the Kelp Rescue Initiative who were critical for sample collection and collaboration. They are doing amazing work applying some the genetic knowledge to real kelp restoration.
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Greg Owens @gregowens.bsky.social · 17/01/2025
Also thank you to the many First Nations who contributed including Gitga'at, Gitxaała, Haida, Haisla, Heiltsuk, Kitasoo-Xai'xais, Kitselas, Kitsumkalum, K'ómoks, Mamalilikulla, Metlakatla, Tlowitsis, and Wei Wai Kum.
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Greg Owens @gregowens.bsky.social · 17/01/2025
Many thanks to the team including @cneufeld.bsky.social, @brookeweigel.bsky.social, @samstarko.bsky.social and many others who aren't on bluesky or who I don't know their handle. This work was spearheaded through many challenges (including awful kelp DNA) by Jordan Bemmels.
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Greg Owens @gregowens.bsky.social · 17/01/2025
One interesting pattern did emerge that the amount of inbreeding load (i.e. selfed vs outbred) varies between populations and this is related to Ne. Small populations have already achieved near their max load so selfing doesn’t increase it.
Predicted changes in realized genetic load under different cross types for bull kelp (A–C) and giant kelp (D–F) suggest a penalty for selfing (A, B, D, and E) and reduced load in between-population crosses (C and F). Realized genetic load is measured as the proportion of sites homozygous for the derived allele at moderate- and high-impact sites in the SnpEff analysis.
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Greg Owens @gregowens.bsky.social · 17/01/2025
Does the small populations and selfing help purge deleterious alleles? We looked for sites conserved across brown algae, that did vary in our populations to measure genetic load and found that total load did not vary between small and big populations.
Lack of evidence for purging by natural selection in GERP (A and B) and SnpEff (C and D) analyses.
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Greg Owens @gregowens.bsky.social · 17/01/2025
We found geographic population structure with fairly strong IBD. Interestingly, selfing was common and about 10% of the adult kelp were selfed in both species. Some populations, particularly those in Puget Sound, had really small Ne and diversity.
Genetic structure of bull kelp (A, C, and E) and giant kelp (B, D, and F) in British Columbia and Washington.Genetic health indicators for bull kelp (A, C, E, and G) and giant kelp (B, D, F, and H).
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Greg Owens @gregowens.bsky.social · 17/01/2025
Excited to announce our work on kelp genomics is now out at Current Biology. Lead by Postdoc extraordinaire Jordan Bemmels, we sequence WGS for 600+ bull and giant kelp across BC and Washington. authors.elsevier.com/a/1kSP93QW8S...
Visual abstract for Kelp paper
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Graham Coop @gcbias.bsky.social · 02/01/2025
Congrats to @jeffgroh.bsky.social et al on publication of "Ancient structural variants control sex-specific flowering time morphs in walnuts and hickories" www.science.org/doi/10.1126/...
Science magazine front cover. Picture of a walnut in its opened shell. The text reads "All about timing. Mating type evolution in walnuts and pecans" graphical abstract:
"In Juglans (top left) and Carya, two morphs show complementary temporal separation between male and female flowering (heterodichogamy). Mating types are controlled by two nonhomologous single-locus mechanisms that arose in the common ancestor of each genus, respectively. (Bottom left) Simplified schematic of a putative functional regulatory element at the Juglans locus. (Bottom right) Strong genotypic correlations across the Carya locus indicate a lack of recombination between two colinear haplotypes with similar gene content."
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Per Ahlberg @perahlberg.bsky.social · 23/12/2024
An intriguing new evolutionary story has just dropped, from my friend and colleague Leif Andersson: a discrete population of large predatory herring in the Baltic Sea, apparently in the process of evolving into a new species. 🧪 www.nature.com/articles/s41...
nature.com
Evolution of fast-growing piscivorous herring in the young Baltic Sea - Nature Communications
The Atlantic herring is one of the world’s most abundant vertebrates and a typical plankton feeder of major ecological importance. This study shows that a piscivorous (fish-eating) ecotype of herring ...
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Stephen Turner @stephenturner.us · 24/12/2024
Genetic ancestry and population structure in the All of Us Research Program cohort www.biorxiv.org/content/10.1101/202… 🧬🖥️🧪
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Darren Irwin (he / him) @darrenirwin.bsky.social · 23/12/2024
OK folks this is my first announcement of a lab publication on Bluesky: Congrats to PhD Candidate Rashika Ranasinghe on today's publication of her paper "Cryptic Hybridization Dynamics in a Three-Way Hybrid Zone of Dinopium Flamebacks on a Tropical Island." Happy holidays! doi.org/10.1002/ece3...
doi.org
Cryptic Hybridization Dynamics in a Three‐Way Hybrid Zone of Dinopium Flamebacks on a Tropical Island
This study explores population divergence and hybridization dynamics across the golden-backed (Dinopium benghalense) and red-backed (D. psarodes) flameback woodpecker hybrid zone in Sri Lanka. The ge...
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Jeff Spence @jeffspence.github.io · 17/12/2024
What do GWAS and rare variant burden tests discover, and why? Do these studies find the most IMPORTANT genes? If not, how DO they rank genes? Here we present a surprising result: these studies actually test for SPECIFICITY! A 🧵on what this means... (🧪🧬) www.biorxiv.org/content/10.1...
biorxiv.org
Specificity, length, and luck: How genes are prioritized by rare and common variant association studies
Standard genome-wide association studies (GWAS) and rare variant burden tests are essential tools for identifying trait-relevant genes. Although these methods are conceptually similar, we show by anal...
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Ostevik Lab @osteviklab.bsky.social · 07/12/2024
Excited to see this paper out! www.nature.com/articles/s41...
nature.com
Inversions contribute disproportionately to parallel genomic divergence in dune sunflowers - Nature Ecology & Evolution
Analysis of habitat data, quantitative trait locus mapping of seed size and selective sweeps show parallel selection acting on inversions in two independent dune ecotypes of the prairie sunflower, Hel...
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Greg Owens @gregowens.bsky.social · 29/11/2024
In kelp, we see a similar pattern of reduced inbreeding depression in small populations. For the kelp dataset, selfed individuals have less of an increase in realized load when they come from small populations. 5/5
biorxiv.org
Population genomics reveals strong impacts of genetic drift without purging and guides conservation of bull and giant kelp
Kelp forests are declining in many parts of the northeast Pacific[1][1]–[4][2]. In small populations, genetic drift can reduce adaptive variation and increase fixation of recessive deleterious alleles...
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Greg Owens @gregowens.bsky.social · 29/11/2024
Lastly, do a simulation to show that under similar bottlenecks, most of the time the species goes extinct. I feel like these sims would be highly depend on the distribution of fitness effects and how that interacts with density, but its a bit outside my wheelhouse to judge. 4/
Figure 5 of attached paper
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Greg Owens @gregowens.bsky.social · 29/11/2024
They go on to show that this probably because the species went through an EXTREME bottleneck (Ne = 6). This means that the entire species is fixed for more deleterious alleles, but inbred individuals don't have an extra amount of homozygous ones. 3/
Figure 2 of the attached paperFigure 4 of attached paper
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Greg Owens @gregowens.bsky.social · 29/11/2024
Many papers attempt to measure genetic load based on SNPs (myself included), but this paper goes the extra step of linking that to health status of the seals. They show that the more inbred individuals are not less healthy, contrary to what we might expect 2/
Figure 1 of the attached paper
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Greg Owens @gregowens.bsky.social · 29/11/2024
Our lab is reading Hoffman et al this week in lab meeting. They look at inbreeding depression after an extreme bottleneck in northern elephant seals. 1/
nature.com
Genomic and fitness consequences of a near-extinction event in the northern elephant seal - Nature Ecology & Evolution
Analysis of northern elephant seal populations shows no evidence of inbreeding depression, probably because a recent extreme bottleneck purged much of the genetic load.
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Greg Owens @gregowens.bsky.social · 28/11/2024
But they were, all of them, deceived, for another K was made. In the land of California, in the fires of Stanford, the Dark Lord Pritchard forged in secret, a master K, to control all others
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Greg Owens @gregowens.bsky.social · 28/11/2024
Panmictic wheat releasing its pollen.
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Greg Owens @gregowens.bsky.social · 28/11/2024
I say filter for that directly. I agree there tend to be a lot of those and they’re probably not real.
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