Jackson Laboratory

The Dumont Lab

Principal Investigator: Beth Dumont, Ph.D.

The Jackson Laboratory
Bar Harbor, ME

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Researching the mechanisms that generate genetic diversity through the lens of evolution

Our Research Focus

The broad objective of my research program is to understand the causes and consequences of variation in the cellular mechanisms that govern DNA inheritance: genetic recombination, chromosome segregation, and de novo mutation. To date, my work has combined wet-bench and computational approaches in multiple mammalian model systems to investigate variation in two recombination mechanisms, crossing-over and gene conversion. Over the next several years, my research group will work at the leading edge of genomics, evolutionary genetics, and cytogenetics to advance our understanding of recombination rate variation from diverse biological perspectives.

Full Scientific Report

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Open Positions

Job	Job Title	Location	Description

Lab Staff

Uma Arora

PhD Student

Investigating the composition and diversity of centromeric sequence amongst Mus musculus subspecies and autosomes vs sex chromosomes to understand their significance in evolution.
Laura Blanco-Berdugo, MS

Research Assistant II

Interested in genetic diversity and evolution of wild and wild-derived mice
Beth Dumont, Ph.D.

Assistant Professor
Brett Haines, B.S.

Research Assistant
Raman Akinyanju Lawal, Ph.D.

Postdoctoral Associate

Unraveling the patterns of genetic mechanisms that give rise to genetic diversity in house mouse populations.

Selected Publications

Highlighted Abstract

Knowledge of the rate and pattern of new mutation is critical to the understanding of human disease and evolution. We used extensive autozygosity in a genealogically well-defined population of Hutterites to estimate the human sequence mutation rate over multiple generations. We sequenced whole genomes from 5 parent-offspring trios and identified 44 segments of autozygosity. Using the number of meioses separating each pair of autozygous alleles and the 72 validated heterozygous single-nucleotide variants (SNVs) from 512 Mb of autozygous DNA, we obtained an SNV mutation rate of 1.20 × 10(-8) (95% confidence interval 0.89-1.43 × 10(-8)) mutations per base pair per generation. The mutation rate for bases within CpG dinucleotides (9.72 × 10(-8)) was 9.5-fold that of non-CpG bases, and there was strong evidence (P = 2.67 × 10(-4)) for a paternal bias in the origin of new mutations (85% paternal). We observed a non-uniform distribution of heterozygous SNVs (both newly identified and known) in the autozygous segments (P = 0.001), which is suggestive of mutational hotspots or sites of long-range gene conversion.

View full list of publications

Research HighlightSeptember 20, 2019
An epigenetic eraser
The genome editing tool, Casilio, can be used to efficiently remove methyl groups from DNA and activate expression of methylation-silenced genes in experimental systems. Casilio was created by Jackson Laboratory Assistant Professor Albert Cheng.
Research HighlightAugust 21, 2019
The future of human and experimental genetics
This year, science luminaries came to Maine for an additional special symposium that celebrated the McKusick Short Course's 60th anniversary. The symposium title, “The Future of Human and Experimental Genetics,” foreshadowed the theme of the talks.
Press ReleaseAugust 01, 2019
Preventing anaphylaxis
New research by JAX Assistant Professor Adam Williams, published in Science, points the way to more precise allergy testing as well as identifying new approaches for treating allergy.
- Immunology
- Genetics and Genomics
Tech CornerJuly 17, 2019
Improved methods, expanded capabilities: Analyzing cells one at a time
Researchers are able to do many things today that were impossible five, three, even one year ago. Some of the new options are science-fiction-level impressive.

Search MagazineSeptember 04, 2019
Computing the etiology of cancer
What if, much like screening through genetic testing, we could learn how to better treat individual patients through their unique epigenetic markers? This is the question that Assistant Professor Sheng Li, Ph.D. tackles in her lab every day.
Research HighlightAugust 21, 2019
The long-term maintenance of sperm production in mammals
A research team led by Professor and Janeway Distinguished Chair Robert Braun, Ph.D., and Associate Research Scientist Manju Sharma, Ph.D., found a rare subpopulation of spermatogonial cells expressing a specific protein, EOMES, that appear to represent the elusive long-lived spermatogonial stem cells that support continued spermatogenesis.
Search MagazineJuly 23, 2019
Unraveling the genetics of heart failure
JAX predoctoral associate Anthony Pettinato has been awarded a fellowship from the American Heart Association to support his doctoral research program. He is using genetics to understand the causes of heart failure.
- Cardiovascular
- Genetics and Genomics
Press ReleaseJuly 15, 2019
Research team creates new research models for Snyder-Robinson Syndrome
Two new mouse models created to study neurological developments in Snyder-Robinson Syndrome to advance global understanding of this rare disease.