Samridhi Chaturvedi

@samridhi.bsky.social

Evolutionary genomics 🧬, Molecular ecology, 🦋🦋🦋 biology, Assistant Professor, EEB, Tulane University https://chaturvedi-lab.wp.tulane.edu/

📢New paper in @journal-evo.bsky.social! This work expands our understanding of seasonal camouflage polymorphism, dissecting the genetic basis of winter colour variation (white and brown morphs) in the long-tailed weasel (Neogale frenata). Paper here ⬇️ doi.org/10.1093/evol... 1/5

Museum genomics links MC1R alleles to adaptive winter coat color polymorphism in the long-tailed weasel

Abstract. Understanding the architecture of biological adaptations is a major endeavor of evolutionary biology. Using Natural History collections, we study

doi.org

Excited to share a preprint of my 3rd dissertation chapter! We evaluated how a potential genomic measure of sexual selection strength, the ratio of genetic diversity on the Z chromosome vs the autosomes, varies across selective and biogeographic contexts in #manakins. Check it out! bit.ly/4fY43de

Can the Z:A ratio serve as a genomic index of sexual selection? An assessment across space and time in a genus of lekking birds

Understanding the role of sexual selection in shaping evolutionary trajectories is a key goal of biology, and thus developing a genomic measure of sexual selection strength is desirable. In systems wi...

biorxiv.org

New paper out! Limited evidence that butterflies are capable of changing their thermoregulatory performance or thermal tolerance in response to local climatic conditions. Instead, poorer thermoregulators have shown stronger upwards elevational range shifts in response to climate change rdcu.be/fuSJE

Butterflies with low thermoregulatory capacity show greatest upwards range shifts along an elevational gradient

Communications Biology - Lack of variation in thermoregulatory capacity or thermal tolerance in butterflies across an elevational gradient suggests limited adaptive capacity. Poorer...

rdcu.be

🎉 PUBLISHED!!!! Out now in @newphyt.bsky.social 🎉 We found positive selection on leaf shape plasticity in a Monkeyflower species. This experiment used two big field transplants, greenhouse, AND growth chamber work. It was hard, but awesome. With @ferrisifolius.bsky.social doi.org/10.1111/nph....

Phenotypic plasticity is broadly adaptive across an elevation gradient in the Cutleaf Monkeyflower

Leaf shape plasticity expression is variable in Mimulus laciniatus.

doi.org

Why are leaves the shape that they are? What controls intraspecific, genetic variation in leaf shape? New from my lab, in collaboration with many others, led by PhD student Amanda Peake: mapping the leaf shape polymorphism in Ipomoea hederacea.

Homozygous recessive entire leaf of Ivyleaf morning gloryHomozygous dominant, lobed leaf of Ivyleaf morning glory
bioRxiv Plant Bio@biorxiv-plants.bsky.social · 2mo ago

Newly arisen indel governs a leaf shape polymorphism in the Ivy Leaf Morning Glory (Ipomoea hederacea) https://www.biorxiv.org/content/10.64898/2026.06.04.730136v1

Four decades of satellite observations reveal that mangrove forests globally have recently shifted from net loss to net gain, with reduced degradation and continued regrowth and expansion, suggesting early signs of conservation success. Learn more this week in Science: https://scim.ag/4vMGzx9

A young mangrove tree stands at the front line of the shifting boundary between land and sea in Florida Bay, Florida, USA.

1/6) What if aging begins, in part, as a bargain made in youth? In turquoise killifish, editing vgll3—a gene linked to puberty-timing in humans and salmon—revealed one of the first causal single-gene examples of antagonistic pleiotropy in vertebrate aging 🧵

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I’m starting at Oregon State University this September as Herbarium Director and Assistant Professor in the Department of Botany and Plant Pathology. An absolute dream job and I am so grateful! Looking to grow the lab soon and will update here. In the meantime please don’t hesitate to reach out!

Picture of a person (me) holding a stuffed beaver toy and a laptop that reads “McKenzie Lab at Oregon State University”