Herbicide-tolerant (HT) mustard is a genetically modified variety of Brassica juncea (Indian mustard) engineered to survive application of the herbicide glufosinate ammonium. The tolerance is conferred by the bar gene (phosphinothricin acetyltransferase gene), which allows the plant to neutralize the herbicide's toxic effects.
Mustard is largely self-pollinating — its flowers have both male and female organs, and self-fertilize before flowers even fully open. This makes creating high-yielding commercial hybrids (which require crossing two different parent lines) extremely difficult. Traditional breeding methods yield only modest results. GM technology solves this by introducing controlled male sterility, allowing cross-pollination and heterosis (hybrid vigor).
Result: Yield gains of 28–37% over conventional varieties, critical for reducing India's edible oil import bill (currently ₹20+ billion annually).
| Dimension | Current Status (2025–26) |
|---|---|
| Botanical Species | Brassica juncea (Indian mustard / Sarson) |
| Growing Region | Rajasthan, Haryana, Madhya Pradesh, Uttar Pradesh, Assam (Northwest dry zones) |
| Current Yield | 1.0–1.3 tonnes/hectare (benchmark: Varuna variety) |
| Global Average Yield | 2.0–2.2 tonnes/hectare (Australia, Canada) |
| Cultivation Area (India) | 6–7 million hectares |
| Oil Content | 35–40% (seed basis); high erucic acid (30–50%) in conventional varieties |
| Crop Season | Rabi (October–March sowing; Feb–May harvest) |
DMH-11 contains three foreign genes, all derived from Bacillus amyloliquefaciens (a non-pathogenic soil bacterium):
Male-Sterile Varuna × Fertile Heera-2 = F1 DMH-11 (hybrid, fertile, high-yielding)
The barnase-barstar system enables controlled pollination (not possible in self-pollinating mustard naturally). Seed production requires herbicide (glufosinate) to kill weeds without harming the GM mustard.
UPSC may ask: "Which soil bacterium provides genes for DMH-11?" → Bacillus amyloliquefaciens (NOT Bacillus thuringiensis, which is used in Bt cotton). Both are soil bacteria, but different species with different genes.
From initial concept to GEAC approval: 20 years of research. From approval to actual farmer fields: still pending due to Supreme Court litigation. Estimated delay cost to farming community: ₹124,306 crore (USD 16 billion) during 2016–2024 period.
The Genetic Engineering Appraisal Committee (GEAC) is India's apex regulator for genetically modified organisms, functioning under the Ministry of Environment, Forests & Climate Change (MoEF&CC). Established under the Rules, 1989 (Manufacture, Use, Import, Export and Storage of Hazardous Micro Organisms / Genetically Engineered Organisms or Cells), GEAC evaluates biosafety and environmental release of all GM crops in India.
| Condition | Details |
|---|---|
| Approval Type | Conditional approval for environmental release (not commercial release — additional clearance needed) |
| Validity Period | 4 years initial; renewable for 2 years at a time based on compliance reports |
| Permitted Activities | Seed production of DMH-11 hybrid; field demonstration studies on seed multiplication, yield, environmental impact |
| Parental Lines Released | Deregulated parental events bn3.6 and modbs2.99 for use by ICAR institutions to create new hybrids |
| Monitoring Conditions | ICAR to conduct field trials studying impact on honeybees, pollinators, soil microbes; observations recorded and reported annually |
| Commercial Release | Requires separate clearance from Ministry of Agriculture & Environment Ministry after successful field demonstrations |
| Revocation Clause | Approval can be revoked if any evidence of harmful effects (environmental, health, safety) emerges during monitoring |
Key Acts & Rules Applicable:
Decision: Environmental release approved for DMH-11 seed production and field demonstration. Rationale: 20 years of rigorous testing (BRL I & II trials 2008–2016); extensive toxicity/allergenicity studies at National Institute of Nutrition; safety assessment by National Dairy Development Board, Department of Biotechnology, and ICAR. No evidence of harm to food, feed, or environment in Indian agroclimatic conditions. Approval aligns with India's food security goals.
Statement: "DMH-11 has received full commercial release approval from GEAC and government." WRONG. GEAC gave approval for environmental release (seed production + field trials only). Commercial cultivation requires additional ministerial clearance and remains on hold pending Supreme Court larger bench decision. Many students confuse "environmental release" with "commercial approval" — they are different stages.
| Comparison Variety | Yield Advantage (DMH-11) | Trial Duration & Scope |
|---|---|---|
| Varuna (National Check) | +28% | Multiple years; contained plots; under ICAR supervision |
| RL-1359 (Zonal Check) | +37% | Regional agroclimate trials; Zone II (north-central India) |
| Kranti Hybrid (Old Standard) | +30% | First-generation GM hybrid comparison; shows significant F1 vigor |
1. Herbicide Tolerance (Glufosinate): The bar gene allows selective herbicide application during hybrid seed production (not in farmer fields for grain harvest), reducing manual weeding labor and cost. Herbicide use is limited to seed multiplication stage only, not commercial farm use.
2. Erucic Acid Reduction: DMH-11 oil contains 30–35% erucic acid (lower than conventional 40–50%), aligning with international edible oil standards. Lower erucic acid reduces potential cardiac/liver toxicity risks in animal studies. Better for human consumption and international trade.
3. Oil Content & Seed Quality: Higher oil content per seed; improved fatty acid profile. Expected to increase domestic mustard oil quality and reduce premium paid for imports.
4. Hybrid Vigor (Heterosis): F1 offspring of DMH-11 cross show pronounced heterotic gains — the foundation of hybrid crop success globally (rice, maize, cotton). Mustard's self-pollination normally prevents this advantage; GM system unlocks it.
Bt Cotton (2004): Introduced in India with 95%+ adoption today (35 million bales in 2021 vs 13 million in 2002). GM mustard is similar technology tier but for food crop, hence more public scrutiny. If adopted at cotton scale, could add 15–20 million tonnes to domestic oil production.
| Metric | Figures (2021–22 to 2025–26) |
|---|---|
| Domestic Production | 8.5–9.0 million tonnes / year |
| Annual Consumption Demand | 25 million tonnes / year |
| Import Requirement | 14–14.5 million tonnes / year (56–60% of demand) |
| Total Import Bill (2021–22) | ₹1,42,000 crore (~USD 18.99 billion) — record foreign exchange outgo |
| Key Import Sources | Palm oil (Indonesia, Malaysia), Sunflower (Ukraine, Russia), Soybean (USA, Brazil), Canola (Canada, Australia) |
| Import Duty | 5.5% crude oil; extended till March 2025 for palm, soybean, sunflower oils |
| Mustard's Current Contribution | 40% of India's total edible oil production; highest oil content among Indian oilseeds |
Current Acreage: 6–8 million hectares across Northwest India (Rajasthan, Haryana, Madhya Pradesh, Uttar Pradesh, Punjab, Assam)
Current Average Yield: 1.0–1.3 tonnes/hectare (global average: 2.0–2.2 tonnes/hectare — India lags by ~50%)
Projected Acreage with DMH-11: If 30% of area shifts to hybrids at 3.0–3.5 t/ha, potential additional production ≈ 4–5 million tonnes/year
Annual Mustard Output (2025): 12–12.5 million tonnes of seed; oil equivalent ≈ 4.5–5.0 million tonnes
| Country / Region | Yield (t/ha) | Notes |
|---|---|---|
| Australia | 2.5–3.0 | Uses some GM mustard & modern hybrids |
| Canada | 2.0–2.5 | Canola (Brassica napus) — higher yielding than mustard |
| USA | 2.0–2.2 | Limited mustard cultivation; mostly imported |
| India (Current) | 1.0–1.3 | Large acreage but low yield; self-pollinating varieties |
| India (DMH-11 Potential) | 3.0–3.5 | If widely adopted; would exceed global average |
Union Cabinet approved MSP hike: Mustard/Rapeseed MSP raised by ₹250 per quintal for Rabi 2026-27 marketing season. This is the highest hike among all Rabi oilseeds (barley ₹170, wheat ₹160, gram ₹225). Signal: government prioritizes mustard expansion.
Agriculture Minister approved record mustard procurement proposals under Price Support Scheme (PSS) for Rabi 2025-26 season in Haryana, Uttar Pradesh, and Karnataka. Direct government purchase at MSP when market prices fall below floor price. This scaffolds farmer confidence for expanded cultivation in 2026–27.
Petitioners: Gene Campaign (NGO) and activist Aruna Rodrigues. Challenge: Constitutional validity of GEAC's October 2022 approval for environmental release of DMH-11 under Articles 21 (right to life/healthy environment) and related environmental protections.
Issues before Court: Whether GEAC approval violated established biosafety regulations; whether procedural safeguards were followed; whether DMH-11 poses risks to environment, biodiversity, or human health; whether public consultation was adequate.
| Justice B.V. Nagarathna (Quashed Approval) | Justice Sanjay Karol (Upheld Approval) |
|---|---|
| Core Finding: GEAC approval was procedurally flawed and violated Article 21 (environmental protection) | Core Finding: GEAC approval was scientifically sound and in national interest |
| Key Arguments: (1) GEAC ignored 2012 Technical Expert Committee (TEC) report calling regulatory system "in complete disarray" (2) No genuine public consultation before GEAC decision (3) Environmental release amounts to experimental use in open fields — risks unquantifiable (4) Herbicide tolerance trait untested in Indian agroclimate; previous TEC warned of "unsuitable" HT crops for India | Key Arguments: (1) 20 years of rigorous testing (BRL I & II 2008–2016) under ICAR supervision proves safety (2) Toxicity/allergenicity studies at National Institute of Nutrition show no harm (3) GEAC is competent technical authority; courts should not substitute scientific judgment (4) National interest: reducing ₹1.4+ lakh crore annual edible oil import bill is compelling. Cotton succeeded; mustard should too |
| Conclusion: Annul GEAC approval; order status quo on any plantations; direct Centre to formulate national policy on GM crops with stakeholder consultation | Conclusion: Sustain GEAC approval; allow field trials and demonstrations; scientific evidence supports commercial release readiness |
"The regulatory system for GMOs in India is fragmented and deficient. The 2012 TEC report was a serious red flag ignored by GEAC. Environmental release in open fields (not contained labs) is an experiment on the public. The court has a duty to protect Article 21 rights — right to safe and clean environment."
"Science has spoken clearly. 20 years of testing under ICAR supervision, multiple expert committee approvals, no evidence of toxicity or allergenicity. Delaying this crop costs the nation ₹16,000+ crore in lost production. Hybrid vigour is proven in cotton. Denying farmers this tool is not precaution; it's regulatory paralysis."
Split Verdict Effect: Neither opinion prevails. Case automatically referred to Chief Justice D.Y. Chandrachud to constitute a larger 3-judge or 5-judge bench for final adjudication. Timeline: Likely decision in 2026 or early 2027, pending bench constitution and hearing schedule.
Status Quo Continues: Until larger bench decision, GEAC approval remains under cloud. Commercial release is blocked. However, field trials and seed multiplication under supervision may proceed (status unclear pending larger bench interim order).
In India's legal system, a split verdict between co-judges on a constitutional question is non-conclusive. It signals a genuine constitutional tension — neither science nor law is one-sided. Larger bench's task: weigh scientific evidence against environmental precaution principle; balance national food security with public health rights.
Minimum Support Price (MSP) Hike — Rabi 2026-27 Marketing Season (announced January 2026)
Decision: Cabinet Committee on Economic Affairs (CCEA), chaired by Prime Minister Narendra Modi, approved MSP increases for all mandated Rabi crops for 2026-27 season.
Mustard/Rapeseed: ₹250 per quintal hike (highest increase among Rabi oilseeds). Previous MSP ≈ ₹5,450; new MSP ≈ ₹5,700 per quintal (estimated).
Comparative Hikes (Rabi 2026-27): Safflower ₹600/qt (highest overall), Lentil ₹300/qt, Gram ₹225/qt, Wheat ₹160/qt, Barley ₹170/qt.
Rationale: Incentivize crop diversification; support farmer incomes; expand domestic oilseed production toward self-sufficiency. Message: Government is betting on mustard expansion.
Record Mustard Procurement Proposals Approved (Rabi 2025-26 Season)
Decision: Agriculture Minister Shivraj Singh Chouhan approved proposals from state governments for record-level procurement of pulses and oilseeds under the Price Support Scheme (PSS) during Rabi 2025-26 in Haryana, Uttar Pradesh, and Karnataka.
Mustard Focus: Scientific, well-managed procurement of mustard at MSP in these key producer states. When market prices fall below MSP floor price, government buys directly from farmers — price stabilization mechanism.
Objective: Provide relief to farmers from "throwaway prices"; encourage expanded cultivation; create farmer confidence for 2026-27 season.
Even Before DMH-11 Commercial Launch: Regular (non-GM) hybrid mustard seeds are gaining traction among farmers in Rajasthan, Haryana, Madhya Pradesh. Reported benefits: 16–20% yield advantage over traditional varieties, 2–2.5% higher oil content, better disease resistance, consistent ₹30,000–₹50,000 net profit/acre gain.
Optimal Sowing Window: October 5–25 (field moisture & temperature optimal). Farmers following good agronomic practices see both higher grain yields and better market prices.
Farmer Testimony: "Hybrid mustard hybrids for over a decade... better yield, higher quality... bought a tractor, sent children to better schools..." — Devendra Singh, Haryana farmer (as reported in agricultural media, August 2025).
Market Readiness: Farmer acceptance of mustard hybrids (hybrid concept) is already established. DMH-11 will be positioned as the next frontier — hybrid + GM herbicide-tolerance + public-sector developed (GEAC-approved).
Phase 1 — Pending Larger Bench Decision (June–September 2026): SC larger bench hears case; government continues seed multiplication under ICAR supervision. DMH-11 parental lines (bn3.6, modbs2.99) remain deregulated for ICAR institutions to develop new hybrids.
Phase 2 — Favorable Verdict Scenario (Oct 2026–Dec 2026): If larger bench upholds DMH-11, Ministry of Agriculture seeks final clearance; notification issued for commercial release. Seed production in selected states (Rajasthan, Haryana, UP) begins at scale.
Phase 3 — Farmer Distribution (January–March 2027): Rabi 2026-27 sowing season. DMH-11 hybrid seeds distributed to farmers via state agricultural departments, seed corporations, private dealers. Initial target: 1–2 lakh hectares across north India to test adoption rates and field performance.
Phase 4 — Scaling (2027 onwards): Based on Rabi 2026-27 performance, scale-up planned for subsequent seasons. If adoption mirrors Bt cotton (90%+ coverage), India's mustard acreage could shift 20–30% to hybrids by 2030, adding 4–6 million tonnes annual oil production.
| Statement | Correct / Incorrect | Explanation |
|---|---|---|
| "DMH-11 was developed jointly by IARI (Indian Agricultural Research Institute) and Punjab Agricultural University." | INCORRECT | Correct: Developed by Delhi University's Centre for Genetic Manipulation of Crop Plants (CGMCP), led by Prof. Deepak Pental, with funding from Department of Biotechnology and National Dairy Development Board. IARI and PAU were NOT co-developers (though they conducted trials). UPSC-2024 incorrectly stated joint development; this was caught as error in official answer key. |
| "DMH-11 is herbicide-resistant because of the barnase gene." | INCORRECT | Correct: Herbicide tolerance is conferred by the bar gene (phosphinothricin acetyltransferase), which inactivates glufosinate ammonium. Barnase induces male sterility; barstar restores fertility. Three distinct genes, three distinct functions — a common student confusion. |
| "GEAC approved commercial cultivation of DMH-11 in October 2022." | INCORRECT | Correct: GEAC approved "environmental release" for seed production and field demonstration trials only. Commercial cultivation requires additional clearance from Ministry of Agriculture and Environment Ministry, and remains blocked by Supreme Court status quo (Nov 2022 onwards). Many students and even news reports conflate "environmental release" with "commercial approval" — critical distinction for UPSC. |
| "The herbicide glyphosate is used to control weeds in DMH-11 fields." | INCORRECT | Correct: The herbicide is glufosinate ammonium (Liberty herbicide), not glyphosate (Roundup). Glyphosate is used in Roundup Ready crops (soybeans, corn). Glufosinate mode of action is different (faster desiccation). Exam trap: both are broad-spectrum herbicides, but different molecules and different GM systems. |
| "Mustard is an easy crop to hybridize because it self-pollinates naturally." | INCORRECT | Correct: Mustard's self-pollination is a barrier to hybridization. Because flowers self-fertilize, preventing cross-pollination is hard. GM barnase-barstar system solves this by introducing controlled male sterility (barnase), forcing cross-pollination, then restoring fertility in F1 (barstar). The "problem" (self-pollination) is reframed as the "solution driver" in exam questions. |
| "DMH-11 has received Supreme Court approval for commercial cultivation as of June 2026." | INCORRECT | Correct: SC delivered a split verdict (July 2024), not approval. Case referred to larger bench. Status quo remains (no commercial release). Unless larger bench has issued a final decision between June 9–30, 2026 (publication date), the statement is false. Check current news for larger bench verdict status when answering this question on exam day. |
| "The barnase-barstar gene system is originally from Bacillus amyloliquefaciens, same source as Bt cotton's Bt gene." | INCORRECT | Correct: Barnase-barstar are from Bacillus amyloliquefaciens (used for male sterility/fertility restoration). Bt cotton's Bt gene is from Bacillus thuringiensis (different species, codes for insecticidal Cry proteins). Both are Bacillus; different species, different traits. Easy exam trap conflating two different GM technologies. |
UPSC Prelims 2024 Error Caught: A question stated "DMH-11 jointly developed by IARI and PAU." This was incorrect; correct answer is Delhi University (Prof. Deepak Pental). Students who memorized the wrong source lost marks. Always verify: Delhi University, Centre for Genetic Manipulation of Crop Plants, not IARI/PAU.
Frequent Confusion: Students say "DMH-11 has GEAC approval" (correct) but then conclude "it is approved for commercial farming" (incorrect). GEAC approval = environmental release = seed production + field trials only. Commercial release requires additional ministerial clearance + SC legal clearance. Never assume GEAC = ready for farmers.
Three genes, three functions: Barnase (sterility) ≠ Barstar (fertility) ≠ Bar (herbicide tolerance). Students often say "bar gene confers male sterility" or "barnase is for herbicide resistance." These are WRONG. Exam may ask "Which gene restores fertility in F1 hybrids?" Answer: Barstar (the inhibitor of barnase).
If asked: "DMH-11 development took how long before GEAC approval?" Answer: 20 years (2002-2005 concept → 2008-2016 BRL trials → October 2022 GEAC approval). If asked: "Why is mustard hybridization difficult?" Answer: Self-pollination prevents cross-pollination (not "lack of technology" or "low oil content"). If asked: "Which body approved environmental release of DMH-11?" Answer: GEAC (Genetic Engineering Appraisal Committee) under Ministry of Environment, not Ministry of Agriculture.