Original Coverage & Source Attribution: www.global-agriculture.com
01 November 2026, Ithaca, US: A Cornell University team has built a new gene editing tool that works on a different mechanical principle than CRISPR, the gene editing method that has driven most crop biotechnology breakthroughs of the past decade, and says the new system could eventually insert far larger pieces of DNA into a genome with more precision than current tools allow.
The research, led by Joe Peters, a professor of microbiology at Cornell’s College of Agriculture and Life Sciences, was published online on October 1, 2026 in the journal Molecular Cell. Co-first authors Richard Schargel, who completed his doctorate at Cornell this year, and current graduate student Laura Chacon Machado worked alongside Alba Guarné, a professor of biochemistry at McGill University in Montreal, on the project. The university’s Cornell Chronicle publication reported the findings on October 7, 2026, and the team has applied for a patent on the technology.
CRISPR, short for clustered regularly interspaced short palindromic repeats, is a set of molecular tools borrowed from bacterial immune systems that scientists reprogram to cut or alter specific locations in a plant or animal’s DNA. Most crop applications of CRISPR today use related techniques called base editing and prime editing, which change one DNA letter or a handful of letters at a precise spot, for example to disable a gene that makes a crop susceptible to a disease.
The Cornell system works differently. It is built around two bacterial proteins called TldR and TniQ, which the team fused together with other components into what is known as an RNA guided transposition system, non CRISPR machinery that nonetheless shares an evolutionary origin with CRISPR. TldR acts as a locator, using a short strand of RNA to find the exact spot in a genome where a new piece of genetic material should go. TniQ then helps assemble the machinery that inserts that DNA payload at the identified spot, and does so in a single, consistent orientation rather than a random one.
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Inserting whole genes, not just single letters
The practical advance, according to the researchers, is scale. Base and prime editing are well suited to correcting or disabling small stretches of DNA, but they are not designed to insert entire genes or larger blocks of genetic material. The Cornell system is built for exactly that task, meaning it could in principle be used to add a complete, functioning gene, rather than only to tweak an existing one. Peters described the appeal to Cornell Chronicle this way: researchers could program the system to carry a large block of DNA into a precise new location in the genome, a capability he said has generated considerable excitement among other scientists in the field.
A second practical advantage is size. The TldR and TniQ based system is smaller than the protein complexes used in most CRISPR-Cas systems. Smaller gene editing machinery is generally easier to package into the viral vectors researchers commonly use to deliver editing tools into living cells, which could simplify how such a system might eventually be delivered into plant tissue. In a related set of experiments described in the same paper, the team also used what they learned about the transposition system to improve the accuracy of an existing CRISPR-Cas system, cutting down on edits that land in the wrong part of the genome, a persistent problem known as off-target editing.
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It is important to note what the Cornell team has not yet done. All of the work published so far was carried out in bacteria, the simplest possible test system for this kind of molecular machinery. The TldR protein belongs to a larger family found across many bacterial species, and the researchers say their next step is to screen that wider family for versions that might function inside plant or animal cells, including human cells for potential use in treating genetic diseases. No crop has been edited with this system, and the researchers themselves describe plant applications as a hoped for future use rather than a demonstrated result.
That distinction matters for anyone assessing how soon this research could affect seed breeding or crop trait development. Tools that can reliably insert large genes, rather than only editing existing ones, would be valuable to breeders working on traits that depend on multiple genes acting together, such as complex disease resistance or stacked traits combining herbicide tolerance with other properties. But that use remains a longer term possibility pending further laboratory work, not a near term product. For now, the Cornell and McGill findings add a new, well documented option to the toolkit that plant biotechnology researchers draw on, even if its first proven applications are in bacterial systems rather than in crops.
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