Why in the News
In 2025 India became the first country to let farmers grow genome-edited rice, and two varieties built by public institutions are now reaching farmers. Keeping that lead, and extending it to wheat, depends on reviving fundamental research in plant science.
What is genome editing, and how were the two rice varieties made?
- What it is: CRISPR gene editing changes a plant’s own gene at a precise spot, like correcting one word in a document instead of adding a page.
- DRR Dhan-100: Its edit partly weakens an enzyme that breaks down cytokinin, the hormone driving grain formation, so the plant sets more grain without stunting.
- Pusa DST Rice-1: An Indian Council of Agricultural Research (ICAR) team deleted part of the rice gene OsDST in 2020. The plant has fewer leaf pores (stomata) and survives salt better.
- No foreign DNA left: No residues of the editing tools were found in the final strains, so the result equals conventional breeding, only faster and more precise.
- The takeaway: Gene editing turns basic research on rice genes into farm-ready seed faster than conventional breeding can.
What did the varieties deliver, and who owns them?
- DRR Dhan-100 harvest: It matured in 130 days against 150 for its baseline strain.
- DRR Dhan-100 yield: It produced close to 20% more rice, about 5.4 tonnes per hectare, with lower water use and labour costs.
- Pusa DST Rice-1 yield: It yields about 10-30% more than baseline strains in salty or alkaline soils.
- Public ownership: Public-institution scientists did the work, so the seeds carry no restrictive patents or licences, and the technology will not block public breeding programmes.
How does India’s public seed system reach farmers?
- Two staple crops: Rice and wheat cover more than half of India’s farmland and supply most of the calories Indians eat.
- Seed chain: ICAR and State agricultural universities supply the first stock, called breeder seed. Partners, including private firms, multiply it into foundation seed.
- National Seeds Corporation: Set up in 1963, it keeps early seed supply reliable.
- Wheat versus rice: Public bodies dominate certified wheat seed, where private firms hold about 5%, a share growing about 8% a year. In rice, private firms dominate hybrid seed.
- Open access: Unlike maize and cotton, public rice and wheat varieties are open to any registered seed company, so they spread widely, cheaply and fairly.
What is apomixis, and why does it suit small farmers?
- Self-cloning seeds: In apomixis, plants skip sexual reproduction, so seeds copy the parent and keep hybrid vigour (the extra yield of a cross) across generations.
- Rice first: Venkatesan Sundaresan and Imtiyaz Khanday first showed it in rice at the University of California, Davis, in 2018. Success rates now reach about 90%.
- Seed savings: Small farmers could replant seed from high-yield crops without losing quality, ending a big yearly seed expense.
- Lighter regulation: Apomixis adds no foreign genes, so it could follow a simpler regulatory path.
How is the world moving on wheat, where India has no gene-edited variety?
- India’s position: No gene-edited wheat has been released in India. Climate-resilient wheat lines among 184 newly introduced crop varieties should reach farmers within three years.
- HB4 wheat: Argentina’s Bioceres Crop Solutions added a sunflower gene to wheat for drought tolerance, so HB4 is genetic modification, not gene editing. It is grown in Argentina, Brazil and Paraguay.
- CRISPR wheat partnerships: InterGrain and United States firm Inari aim to lift wheat yields by 10%, and Australian Grain Technologies plans trials with China’s Qihe Biosciences.
Challenges
- Talent drain: Loud campaigns against genetically modified organisms (GMOs) have pushed young biologists away from plant research into other life sciences.
- Varieties built for another era: Today’s rice and wheat were bred for cheap water, power and heavy chemical use, not for droughts and floods.
- Lab-to-field gap: Apomixis still needs multi-location trials for approval and systems to produce seed at scale.
Way Forward
- Plant science fellowships: ICAR should fund fellowships that draw students back into plant genetics, physiology and crop-disease (host-pathogen) research.
- Clear rules for apomixis: Regulators should set a defined approval route for apomictic crops that carry no foreign genes.
- Open licensing: Public institutions should keep licensing new varieties to every registered seed company as private investment grows.
Conclusion
India’s public seed system has shown that basic research on rice genes can reach farmers as approved seed. Whether that system adapts to apomixis and private entry while rebuilding its research base will decide if wheat follows rice.
Matching Previous Year Question
“[2016] In the context of the developments in Bioinformatics, the term ‘transcriptome’, sometimes seen in the news, refers to (a) a range of enzymes used in genome editing (b) the full range of mRNA molecules expressed by an organism (c) the description of the mechanism of gene expression (d) a mechanism of genetic mutations taking place in cells ANSWER: (b)”

