Forest Services
Genome-Edited Seeds: Foundations for the Second Green Revolution in India
The development of genome-edited rice varieties in India signals a transformative phase in sustainable agriculture, conceptualized as the "Second Green Revolution." Unlike the input-intensive model of the 1960s Green Revolution, this advancement aligns with the tension between technological innovation (precision agriculture) and ecological integrity. Genome-editing technologies, particularly CRISPR-Cas9, offer solutions for climate resilience, resource efficiency, and productivity enhancement while addressing ecological and social costs associated with the first Green Revolution.
UPSC Relevance Snapshot
- GS-III: Agriculture (Food security challenges, Sustainable farming), Science & Technology (Biotechnology, Uses of GM and genome-edited crops).
- Essay: Agriculture and sustainable development; Role of technology in bridging food-security gaps.
- Prelims: Basics of CRISPR-Cas9, SDN-1 and SDN-2 genome editing in India.
Conceptual Framework: Genome Editing vs Genetic Modification
Genome editing, exemplified by CRISPR-Cas9, differs fundamentally from traditional genetic modification (GM) in that it modifies DNA sequences without introducing foreign genes. This distinction enhances its regulatory acceptance and public trust. However, it raises broader questions about oversight and accessibility.
- Genome Editing Features:
- Precise DNA modifications (cut/add/delete) using CRISPR-Cas9.
- SDN-1 and SDN-2 techniques permitted in India under specific biosafety exemptions.
- No foreign DNA insertion (transgenes), enhancing ecological and consumer acceptance.
- Comparison with GMOs:
- GM technology involves transgenic modifications, often resulting in extensive debates on biosafety and biodiversity threats.
- Genome editing operates at a finer scale, offering greater specificity and applicability in food security and healthcare.
Evidence and Data: ICAR's Genome-Edited Rice Varieties
Two genome-edited rice variants, DRR Rice 100 (Kamla) and Pusa DST Rice 1, developed using CRISPR-Cas9, represent actionable outputs of India's genome-editing research. According to ICAR, these varieties promise measurable environmental and economic impacts.
| Parameters | Genome-Edited Rice (India) | Traditional High-Yield Varieties (1960s Green Revolution) |
|---|---|---|
| Yield Increase | 19% higher than base varieties | 50%-200% increase over native strains |
| Greenhouse Gas Emissions | 20% reduction | Higher emissions due to fertilizer use |
| Resource Usage | 7,500 MCM water saved | Increased water consumption due to irrigation |
| Stress Tolerance | Drought, salinity, and heat tolerance added | Low resilience to climate variables |
Key Advantages of Genome-Edited Seeds
The genome-edited crops address key lacunae of the first Green Revolution—unsustainable practices, overdependence on irrigation, and low climate adaptability. These traits position them as pivotal for India's agricultural sustainability goals.
- Higher Productivity:
- Up to 19% gain in yield, meeting food security needs for a growing population.
- Potential adaptation across India's agro-climatic zones (Reference: ICAR data).
- Climate Resilience:
- In-built resistance to salinity, drought, and extreme temperature fluctuations.
- Alignment with SDG 13 (Climate Action) targets.
- Environmental and Cost Benefits:
- Reduction in water use and greenhouse gas emissions aligns with SDG 12 (Responsible Consumption & Production).
- Lesser dependence on chemical fertilizers and pesticides reduces ecological harm.
Critical Evaluation and Limitations
The emergence of genome-edited crops is not without limitations. These challenges highlight the institutional, economic, and ecological concerns associated with large-scale implementation.
- Regulatory Variability:
- While India allows SDN-1 and SDN-2 techniques, global regulatory frameworks remain inconsistent.
- Export barriers may arise due to uneven international acceptance of genome-edited crops.
- Corporate Dependency Risk:
- Patents on CRISPR tools by global companies could make seeds inaccessible to small farmers.
- Lessons from corporate control during the Bt cotton era are yet to be internalized.
- Threat to Genetic Diversity: Overreliance on high-performing varieties may shrink crop biodiversity, making farming systems vulnerable to pests and diseases.
Structured Assessment
- Policy Design:
- Focus on public research funding (₹500 crore allocated in 2023-24 budget).
- Need for ethical guidelines on genome editing in collaboration with international bodies.
- Governance Capacity:
- Streamlining regulatory processes under the Environment (Protection) Act, 1986.
- Building certification and traceability mechanisms for export markets.
- Behavioural/Structural Factors:
- Ensuring farmer awareness and accessibility to genome-edited crops.
- Strengthening agricultural extensions for capacity-building and adoption.
Practice Questions
Prelims Practice Questions
Practice Questions for UPSC
Prelims Practice Questions
- Genome editing introduces transgenes from unrelated species.
- Genome editing results in precise DNA modifications.
- Genome editing is universally accepted without regulation.
Which of the above statements is/are correct?
- They have higher yield potentials.
- They require more water for irrigation.
- They offer improved stress tolerance.
Which of the above statements is/are correct?
Frequently Asked Questions
What is the significance of genome-edited seeds in the context of India's agricultural future?
Genome-edited seeds represent a pivotal innovation aimed at addressing food security challenges while ensuring sustainable agricultural practices. They promise a possible 19% increase in yield and enhanced climate resilience, crucial for adapting to changing environmental conditions.
How do SDN-1 and SDN-2 techniques differ in the context of genome editing regulation in India?
SDN-1 and SDN-2 techniques represent categories of genome editing that allow precise modifications of DNA without introducing foreign genes. This regulatory acceptance in India enhances public trust and potentially lessens the backlash faced by traditional genetically modified organisms (GMOs).
What are the environmental advantages of adopting genome-edited crops over traditional varieties?
Genome-edited crops, with a reported 20% reduction in greenhouse gas emissions and significant water savings, offer considerable environmental benefits compared to traditional high-yield varieties. Their development aims to minimize ecological harm while promoting responsible consumption, in line with Sustainable Development Goals.
What challenges could arise from the dependency on genome-edited seeds for farmers?
The risks of corporate dependency on patented CRISPR tools could restrict access for small farmers, similar to the issues experienced during the Bt cotton era. Additionally, reliance on a limited number of high-performing varieties could threaten genetic diversity, making crops more susceptible to pests and diseases.
How does the concept of genome editing align with global sustainability efforts?
Genome editing aligns with global sustainability efforts through its potential to enhance food security while reducing the ecological footprint of agriculture. By addressing climate resilience and lowering resource requirements, these innovations support the objectives of Sustainable Development Goals, particularly in climate action.
Source: LearnPro Editorial | Science and Technology | Published: 5 May 2025 | Last updated: 22 March 2026
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