Cornell Researchers Unveil Powerful New Genetic Toolkit

Expanded MAGIC system enables genome-wide analysis at single-cell resolution.

Apr. 4, 2026 at 3:32am

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A highly structured abstract painting in soft, earthy tones of green, brown, and blue, featuring sweeping geometric arcs, concentric circles, and precise botanical spirals, conceptually representing the complex forces and structures of the genome.A powerful new genetic toolkit developed at Cornell University promises to accelerate discoveries in development, neuroscience, and disease by enabling genome-wide analysis at single-cell resolution.Ithaca Today

Researchers at Cornell University have developed a new genetic toolkit that allows scientists to study how genes function at the level of individual cells, an advance that could accelerate discoveries in development, neuroscience and disease. The system, an expansion of the MAGIC (Mosaic Analysis by gRNA-Induced Crossing-over) method, provides genome-wide coverage and improved visualization, significantly lowering technical barriers for researchers.

Why it matters

This new toolkit opens the door to large-scale genetic screens at single-cell resolution, enabling researchers to systematically scan the genome for genes involved in key biological processes that were previously difficult or impossible to study at this level of detail. The ability to analyze the fruit fly's historically challenging fourth chromosome could also reveal previously overlooked biological functions.

The details

The expanded MAGIC system works directly with existing genetic stocks, significantly lowering technical barriers while relying on standard laboratory equipment. It also introduces improved fluorescent markers that make mutant cells brighter and easier to track under a microscope. The researchers have made the toolkit broadly available through community repositories, allowing other labs to adopt the system without specialized training.

  • In 2021, the MAGIC toolkit was first developed by the labs of Chun Han and Mariana Wolfner at Cornell.
  • The new study was published in April 2026.

The players

Chun Han

Associate professor in the Department of Molecular Biology and Genetics in the College of Agriculture and Life Sciences (CALS) and the Weill Institute for Cell and Molecular Biology at Cornell University, and co-developer of the original MAGIC method.

Yifan Shen

Graduate researcher at Cornell University who expanded the MAGIC approach into a genome-wide toolkit for Drosophila melanogaster.

Mariana Wolfner

Distinguished Professor of Molecular Biology and Genetics and Stephen H. Weiss Presidential Fellow in CALS at Cornell University, and co-developer of the original MAGIC method.

Bloomington Drosophila Stock Center

A community repository where all fly stocks generated in this research have been deposited to ensure broad access for the research community.

Addgene

A nonprofit plasmid repository that is making the molecular tools developed in this research broadly available.

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What they’re saying

“It saves at least a couple months for studying a single mutation compared to traditional methods. If someone wants to screen hundreds or thousands of mutations, the time saved will be years or more.”

— Chun Han, Associate professor

“Our final design beautifully illuminated the whole neurons, down to the finest branches. This was a huge help for analyzing dendrite morphology of individual neurons.”

— Chun Han, Associate professor

“Many fundamental biological processes are still poorly understood due to the previous inability to screen all genes at the individual cell level. The combination of deficiency libraries and the MAGIC kit greatly accelerate the gene discovery process.”

— Chun Han, Associate professor

“This technique should allow researchers to ask some very interesting questions about speciation in ways impossible before.”

— Chun Han, Associate professor

“We have benefited so much from the supportive Drosophila community. If other labs can now use our system to study their most important questions in ways not possible before, we feel that we have reached our goals.”

— Chun Han, Associate professor

What’s next

The researchers plan to continue expanding the capabilities of the MAGIC toolkit and make it even more accessible to the broader scientific community.

The takeaway

This new genetic toolkit developed at Cornell University represents a significant advancement in the ability to study gene function at the single-cell level, opening up new avenues of research in fields like development, neuroscience, and disease that could lead to important discoveries.