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Scientists Develop “Molecular Scissors” Alternative to Cas9

ISAAA | Agriculture

Scientists Develop “Molecular Scissors” Alternative to Cas9

“Scientists from South China Agricultural University and partners have developed a gene-editing tool called CasY7, a high-performance alternative to Cas9 nuclease that is commonly used in CRISPR gene-editing systems. Originally successful in medical trials, this ‘molecular scissors’ has now been optimized for agriculture. By refining its structure and guidance system, researchers significantly boosted its ability to make precise changes to plant DNA.

In large-scale testing across nearly 1,000 plants, the optimized CasY7 system achieved efficiency rates of 87.7% in maize and 82.9% in rice. This makes the tool nearly three times more effective than previous industry standards. It also proved capable of multiplexing, allowing scientists to edit several traits simultaneously.”

From ISAAA.

Imagen Radio | Food Consumption

Fewer Mexican Households Went Without Food

“Fewer homes in Mexico were left without food due to lack of money © 2026 Imagen – Excélsior. Todos los derechos reservados. El contenido de este sitio y de la edición impresa está protegido por la Ley Federal del Derecho de Autor. Prohibida la reproducción total o parcial sin autorización previa y por escrito. El material de terceros conserva sus propios derechos.

Of the country’s 39.7 million inhabited dwellings, only 6.5 per cent of them had the case that they were once without access to food in the past three months due to a lack of money or resources, according to the Inegi’s 2025 Intercensal Survey.

This proportion of households was lower than that observed in 2020, when 9.2% of households in the country suffered from the situation described, and also compared to 2010, when the proportion was 9.8%.”

From Imagen Radio.

Phys.org | Food Production

Norway’s Automated Farm Sends Lettuce to Stores

“Norway's first fully automated facility for vegetable production was put into operation last fall. This spring, the first products hit store shelves…

'In this facility, no one touches the lettuce from the time it is sown, grown and packaged until it ends up on the store shelf and is finally opened by the customer at home in their kitchen,' says SINTEF researcher Ottar Bakås.”

From Phys.org.

Phys.org | Cultivated Areas

US Irrigation Avoids More Emissions Than It Emits

“Irrigating U.S. crops prevents higher greenhouse gas emissions by avoiding land conversion, new research by Colorado State University shows. Agricultural irrigation allows the United States to grow more food on less land. If irrigation were suddenly shut off, the land-use change required to make up for lost yields would produce significantly more greenhouse gas emissions than irrigation emits—363 times more.

CSU scientists estimate the emissions saved by avoiding land-use change would equate to 363 years' worth of today's U.S. annual greenhouse gas emissions from irrigation.

Converting natural ecosystems to agricultural use releases carbon stored in soil and vegetation. Land use and land conversion for agriculture to produce food, fiber and fuel contribute nearly a quarter of global greenhouse gas emissions, making the sector a key priority for emissions reductions, the study published in Proceedings of the National Academy of Sciences states.”

From Phys.org.

CGIAR | Food Production

More Can Tho Rice Farmers Adopt Mechanized Seeding

“When the Fertilize Right (FerRight) project began working with rice farmers in Can Tho's Thanh An, Thanh Phu, Thoi Xuan, and Trung Hung communes, mechanized direct seeded rice (mDSR) was practiced by fewer than 1 in 100 of them. Two years later, the project's midline farmer survey found that 18% of farmers in these communes had adopted the technology — up from a 2023 baseline of just 0.7%. Fertilizer deep placement, a complementary practice often paired with mDSR, has also taken hold, now reaching 0.5% of farmers and growing. Together, the numbers are one of the clearest signals yet that the project, funded by the United States Department of Agriculture (USDA) and implemented by the International Rice Research Institute (IRRI), is changing how farmers cultivate their rice.

Unlike traditional broadcast seeding, mDSR, paired with fertilizer deep placement, uses dynamic, air-assisted row seeders to place seed precisely 1 to 2 mm into the soil and deliver nutrients directly to the root zone. Multi-season field trials with the Cuu Long Rice Research Institute (CLRRI), spanning four crops from 2024 to 2026, show why the technology is catching on: seed rates fall by at least 50%, nitrogen fertilizer use drops by at least 20%, and the carbon footprint per kilogram of rice produced falls by at least 10%, alongside more uniform stands and greater resilience to pests, disease, and lodging.

Those gains show up in farmers' fields, too. Comparing mDSR adopters with farmers who still broadcast-seed, the project's farm-level adoption study found mDSR fields yielded 6.81 tons per hectare against 6.67 tons for broadcast seeding — a 2.1% advantage — with nitrogen-use efficiency up 1.4% and net income up 2.7% per hectare.”

From CGIAR.