2026 T. Ryan Gregory: Biology and Biochemistry Researcher – H-Index, Publications & Awards

D-Index & Metrics

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Biology and Biochemistry	52	16483	15133	576	531	99	14632

Discipline name

D-Index

World Ranking

Current World Ranking

National Ranking

Current National Ranking

Publications

Citations

Biology and Biochemistry

16483

15133

576

531

14632

Biology and Biochemistry

D-Index

Citations

14632

World Ranking

16483

National Ranking

576

Overview

T. Ryan Gregory is affiliated with the University of Guelph in Canada. Their research spans multiple fields with a focus on Plant Science, Health, General Health Professions, Molecular Biology, and Physiology.

The scientist's work covers various main topics, including:

Indigenous Health, Education, and Rights
Smoking Behavior and Cessation
Chromosomal and Genetic Variations
Behavioral Health and Interventions
Media Influence and Health
Neuroscience, Education and Cognitive Function
CRISPR and Genetic Engineering

Gregory has contributed multiple papers published in prominent venues. Selected recent publications include:

"Throwing away DNA: programmed downsizing in somatic nuclei," 2022, Trends in Genetics
"Transposable element persistence via potential genome-level ecosystem engineering," 2020, BMC Genomics
"Two-Eyed Seeing and other Indigenous perspectives for neuroscience," 2025, Nature
"Perceptions of the Use of Mobile Technologies for Smoking Cessation: Focus Group Study With Individuals of Low Socioeconomic Status Who Smoke," 2024, JMIR Formative Research
"A feature-based qualitative assessment of smoking cessation mobile applications," 2024, PLOS Digital Health

The frequent coauthors collaborating with Gregory include Michael Wakeman, Lydia Tesfaye, Erin Leahy, Brandon Kendrick, and Sherine El-Toukhy. Each of these collaborators has worked with Gregory on multiple publications.

Gregory's research has been published in several venues repeatedly, highlighting a focus on Molecular Cancer Therapeutics, BMC Genomics, Nature, Trends in Genetics, and JMIR Formative Research. Molecular Cancer Therapeutics accounts for the highest number of publications within their portfolio.

Best Publications

The promise of DNA barcoding for taxonomy.

Paul D. N. Hebert;T. Ryan Gregory

1744
Citations
The genome of Tetranychus urticae reveals herbivorous pest adaptations

Miodrag Grbić;Miodrag Grbić;Thomas Van Leeuwen;Richard M. Clark;Stephane Rombauts

1244
Citations
Coincidence, coevolution, or causation? DNA content, cell size, and the C-value enigma.

T. Ryan Gregory

853
Citations
Understanding Natural Selection: Essential Concepts and Common Misconceptions

T. Ryan Gregory

584
Citations
Eukaryotic genome size databases

T. Ryan Gregory;James A. Nicol;Heidi Tamm;Bellis Kullman

539
Citations
The correlation between rDNA copy number and genome size in eukaryotes.

Cheryl D Prokopowich;T Ryan Gregory;Teresa J Crease

504
Citations
Synergy between sequence and size in Large-scale genomics

T. Ryan Gregory

400
Citations
Genome Size Evolution in Animals

T. Ryan Gregory

370
Citations
Understanding Evolutionary Trees

T. Ryan Gregory

349
Citations
DNA-based species delineation in tropical beetles using mitochondrial and nuclear markers

Michael T Monaghan;Michael Balke;T. Ryan Gregory;Alfried P Vogler

341
Citations
The Effects of Chronic Plasma Cortisol Elevation on the Feeding Behaviour, Growth, Competitive Ability, and Swimming Performance of Juvenile Rainbow Trout

T. Ryan Gregory;T. Ryan Gregory;Chris M. Wood

327
Citations
From pixels to picograms: a beginners' guide to genome quantification by Feulgen image analysis densitometry.

David C. Hardie;T. Ryan Gregory;Paul D.N. Hebert

323
Citations
The C-value Enigma in Plants and Animals: A Review of Parallels and an Appeal for Partnership

T. Ryan Gregory

319
Citations
The case for junk DNA.

Alexander F. Palazzo;T. Ryan Gregory

313
Citations
Genome size and developmental complexity.

T. Ryan Gregory

291
Citations
A BIRD'S-EYE VIEW OF THE C-VALUE ENIGMA: GENOME SIZE, CELL SIZE, AND METABOLIC RATE IN THE CLASS AVES

T. Ryan Gregory

278
Citations
The bigger the C-value, the larger the cell: genome size and red blood cell size in vertebrates.

T.Ryan Gregory

277
Citations
The genome and developmental transcriptome of the strongylid nematode Haemonchus contortus

Erich M Schwarz;Erich M Schwarz;Erich M Schwarz;Pasi K Korhonen;Bronwyn E Campbell;Neil S Young

269
Citations
What's in a genome? The C-value enigma and the evolution of eukaryotic genome content

Tyler A. Elliott;T. Ryan Gregory

264
Citations
Insertion-deletion biases and the evolution of genome size.

T.Ryan Gregory

246
Citations