GM crops have appeared in UPSC Prelims in 2011, 2014, 2018, and 2022 — covering Bt Cotton, regulatory bodies, and biosafety protocols. For Mains, this topic bridges GS-III (Science and Technology, Agriculture) with GS-II (Government Policy) and even GS-IV (ethical dimensions of food technology). If you are preparing for 2026-27, understand this: the GM Mustard controversy is unresolved, and UPSC loves unresolved policy debates.
Genetic Engineering: The Science Behind GM Crops
Genetic engineering (also called recombinant DNA technology) involves inserting a gene from one organism into another to express a desired trait — pest resistance, herbicide tolerance, drought resistance, or nutritional enhancement.
The process in plants works through two primary methods:
- Agrobacterium-mediated transformation — A soil bacterium (Agrobacterium tumefaciens) naturally transfers DNA into plants. Scientists hijack this mechanism, replacing the bacterium's tumor-causing genes with the desired gene. This is the most common method for dicot crops
- Gene gun (biolistics) — Microscopic gold or tungsten particles coated with the desired DNA are literally shot into plant cells at high velocity. Preferred for monocots like rice and wheat where Agrobacterium is less effective
Once the foreign gene integrates into the plant's genome, the plant expresses the new protein. Every subsequent generation carries this trait.
Common student mistake: GM crops are NOT the same as hybrid crops. Hybridization crosses two varieties of the same species. Genetic engineering transfers genes across species barriers — a bacterial gene into a cotton plant, for instance.
Bt Cotton: India's Only Approved GM Crop
Bt Cotton remains the only genetically modified crop approved for commercial cultivation in India. Approved in 2002 by the Genetic Engineering Appraisal Committee (GEAC), it was developed by Monsanto-Mahyco (Maharashtra Hybrid Seeds Company).
The Science
The Bt stands for Bacillus thuringiensis, a soil bacterium. Scientists isolated genes from this bacterium that produce Cry proteins (specifically Cry1Ac and Cry2Ab). These proteins are toxic to bollworm larvae (Helicoverpa armigera) — cotton's most destructive pest — but harmless to humans, livestock, and beneficial insects.
When a bollworm larva eats Bt cotton leaves, the Cry protein binds to receptors in the insect's gut, creating pores that cause the gut to rupture. The larva dies within 24-72 hours.
Impact on Indian Agriculture
The numbers tell a compelling story:
- India became the world's largest cotton producer — 355 lakh bales in 2023-24 (ahead of China)
- Yield roughly doubled from 302 kg/hectare (pre-Bt average) to 566 kg/hectare
- Pesticide use on cotton dropped by approximately 50% in the initial decade
- Cotton farmer incomes increased by an estimated 50-60% in the first 5-7 years of adoption
- Bt Cotton adoption reached 95%+ of India's cotton acreage by 2014
The Pink Bollworm Problem
The success story has a caveat. Pink bollworm (Pectinophora gossypiella) has developed resistance to Cry proteins in several Indian states, particularly Gujarat and Maharashtra. This is a textbook case of evolutionary adaptation: sustained exposure to a single toxin creates selection pressure for resistant individuals.
The response has been the development of Bt Cotton with stacked genes (Bollgard II with Cry1Ac + Cry2Ab), but resistance to even stacked proteins has been reported since 2015-16. This undermines one of the fundamental promises of GM technology and highlights the need for Integrated Pest Management (IPM) alongside GM adoption.
GM Mustard (DMH-11): The Unresolved Controversy
DMH-11 (Dhara Mustard Hybrid-11) is a genetically modified mustard variety developed by a team led by Prof. Deepak Pental at the Centre for Genetic Manipulation of Crop Plants, University of Delhi.
The Science
India imports 55-60% of its edible oil requirement, making oilseed self-sufficiency a national priority. Mustard is India's most important rabi oilseed crop, but Indian mustard varieties are self-pollinating, making conventional hybridization extremely difficult.
DMH-11 uses the barnase-barstar system:
- Barnase gene (from bacterium Bacillus amyloliquefaciens) — inserted into one parent line to create male sterility (prevents pollen production)
- Barstar gene — inserted into the other parent line to restore fertility in the hybrid offspring
- Bar gene — confers herbicide tolerance (tolerance to glufosinate ammonium) — used as a selectable marker during development
The hybrid offspring shows 25-30% higher yield than the best conventional mustard varieties in field trials.
Regulatory Timeline
- 2017 — GEAC recommended environmental release for seed production
- October 2022 — GEAC approved environmental release of DMH-11
- November 2022 — Supreme Court stayed commercial release following PIL by activist Aruna Rodrigues
- 2023-2025 — Limited field trials continued under monitoring, but commercial cultivation remains stayed
Why the Controversy?
The opposition to GM Mustard centers on several arguments:
- Herbicide tolerance (HT) trait — Critics argue the bar gene will lead to increased herbicide use, harming soil microbiota, farmworkers, and consumers. The developers counter that the bar gene is only a marker and HT is not the intended commercial trait
- Gene flow — Mustard has wild relatives in India. Cross-pollination could transfer transgenes to wild species, creating herbicide-tolerant weeds
- Bee and pollinator impact — Mustard is a major source of nectar for honeybees. Opponents allege potential toxicity to pollinators, though biosafety data has not confirmed this
- Corporate control — Concerns about proprietary seed technology concentrating agricultural power
Regulatory Framework for GM Crops in India
GEAC (Genetic Engineering Appraisal Committee)
The apex regulatory body for GM organisms in India. Key facts:
- Functions under the Ministry of Environment, Forest and Climate Change (MoEFCC)
- Originally called "Genetic Engineering Approval Committee" — renamed to "Appraisal Committee" in 2010 to clarify that approval authority rests with the government, not the committee
- Chaired by the Special Secretary/Additional Secretary, MoEFCC
- Co-chaired by a representative of the Department of Biotechnology (DBT)
- Approves activities involving large-scale use of hazardous microorganisms and recombinants in research and industrial production, and environmental release of GMOs
Regulatory Architecture
The entire regulatory framework operates under the Environment Protection Act (EPA), 1986 and the Rules for Manufacture, Use, Import, Export and Storage of Hazardous Microorganisms, Genetically Engineered Organisms or Cells, 1989. Six competent authorities oversee different aspects:
| Authority | Function |
|---|---|
| RDAC (Recombinant DNA Advisory Committee) | Policy guidance on research |
| IBSC (Institutional Biosafety Committee) | Monitors lab-level GM research in institutions |
| RCGM (Review Committee on Genetic Manipulation) | Approves small-scale field trials |
| GEAC | Approves large-scale trials and environmental release |
| SBCC (State Biotechnology Coordination Committee) | State-level monitoring |
| DLC (District Level Committee) | District-level monitoring of GM activities |
FSSAI and GM Food Labeling
The Food Safety and Standards Authority of India (FSSAI) regulates GM food products under the Food Safety and Standards Act, 2006. The Food Safety and Standards (Genetically Modified or Engineered Foods) Regulations require mandatory labeling of food products containing GM ingredients above 1% threshold. Enforcement remains weak.
International Framework
Cartagena Protocol on Biosafety (2003)
India is a party to the Cartagena Protocol, a supplementary agreement to the Convention on Biological Diversity (CBD). Key provisions:
- Establishes Advance Informed Agreement (AIA) procedure — countries must be notified before GMOs are shipped across borders
- Creates the Biosafety Clearing-House for information exchange
- Recognizes the precautionary approach — lack of scientific certainty is not a reason to avoid protective measures
- Establishes liability and redress framework under the Nagoya-Kuala Lumpur Supplementary Protocol (2010)
Codex Alimentarius
The FAO/WHO Codex Alimentarius Commission sets international food safety standards including guidelines for GM food safety assessment. India follows Codex principles in its environmental laws framework for biosafety evaluation.
Arguments For and Against GM Crops
Arguments in Favor
- Food security — India needs to feed 1.44 billion people with shrinking arable land. GM crops offer higher yields per hectare
- Pest resistance — Reduced pesticide use protects farmer health and the environment. Bt Cotton demonstrated this effectively
- Climate adaptation — Drought-tolerant and flood-resistant GM varieties can buffer against climate change impacts. Relevant to India's climate commitments
- Nutritional enhancement — Golden Rice (fortified with Vitamin A precursor beta-carotene) could address Vitamin A deficiency affecting 190 million children globally. Philippines approved it in 2021. India has not
- Reduced input costs — Less spending on pesticides and potentially higher returns for small farmers
- Scientific consensus — Over 3,000 studies and major scientific bodies (WHO, NAS, EASAC) confirm that approved GM crops are as safe as conventional crops for human consumption
Arguments Against
- Biodiversity risk — Gene flow to wild relatives could create invasive "superweeds." India is a center of origin for several crop species
- Corporate seed monopoly — Proprietary GM seeds force farmer dependence on multinational corporations. Bt Cotton royalty disputes between Monsanto and Indian government are well-documented
- Health uncertainty — While current evidence shows no harm, critics argue long-term multi-generational studies are insufficient
- Socioeconomic impact — Expensive GM seeds can trap small farmers in debt cycles. The Bt Cotton-farmer suicide correlation, while contested and oversimplified, reflects real agrarian distress
- Non-GM contamination — Cross-pollination can contaminate non-GM and organic crops, destroying market access for organic farmers
- Herbicide treadmill — HT crops incentivize herbicide use, potentially leading to resistant weeds and environmental damage
GM Crops Globally: Status Table
| Crop | Primary Trait | Key Approved Countries | India’s Status |
|---|---|---|---|
| Bt Cotton | Insect resistance (bollworm) | India, USA, China, Pakistan, Australia | Commercially cultivated since 2002 |
| GM Mustard (DMH-11) | Hybrid vigor via barnase-barstar | None commercially | GEAC approved, SC stayed commercial release |
| Bt Brinjal | Insect resistance (fruit borer) | Bangladesh (since 2014) | Moratorium since 2010 (Jairam Ramesh) |
| Golden Rice | Vitamin A fortification | Philippines, Australia, New Zealand | Not approved |
| GM Soybean | Herbicide tolerance | USA, Brazil, Argentina, Paraguay | Import allowed for processing, not cultivation |
| GM Maize | Insect resistance + HT | USA, Brazil, South Africa, Philippines | Not approved for cultivation |
| GM Canola | Herbicide tolerance | Canada, USA, Australia | Not approved |
| Arctic Apple | Non-browning trait | USA, Canada | Not approved |
Tell Google you want more of this.
Add Anantam IAS as a preferred sourceOne tap, and this site shows up more often in your own Top Stories, AI Overviews and AI Mode. Remove it any time.
