Bollgard I and Bollgard II technologies are mentioned in the context of

Updated 11 Apr 2026 · From UPSC Prelims GS Paper I 2021, Q92

Contents18

UPSC Prelims GS2021Science and Technology

Aclonal propagation of crop plants
Bdeveloping genetically modified crop plants
Cproduction of plant growth substances
Dproduction of biofertilizers

Show answer

Answer: (B) developing genetically modified crop plants

Bollgard I and Bollgard II are genetically modified (GM) cotton technologies.

Bollgard I (approved 2002) was India's first biotech crop, containing a single gene (Cry1Ac) from Bacillus thuringiensis (Bt) that produces a protein toxic to the American Bollworm.

Bollgard II (approved 2006) has two genes (Cry1Ac + Cry2Ab) providing broader protection against bollworms and Spodoptera caterpillar.

Both are products of genetic engineering.

Answer: (b).

Why this was asked

Bollgard I and Bollgard II are the only GM crop technologies commercially approved in India, making them critical for understanding India's GM crop policy.

These Bt cotton varieties contain genes from Bacillus thuringiensis bacteria that produce proteins toxic to specific crop pests, demonstrating the core principle of genetic modification.

The question tests whether students can distinguish genetic modification from other biotechnology applications like cloning, growth hormones, or biofertilizers.

Bollgard I & II Technologies

Science And Technology Bollgard I Bollgard II

Bollgard I & II: India's First GM Crop Technologies

Must know

Bollgard I (2002): India's first GM crop with single Cry1Ac gene

Bollgard II (2006): Enhanced version with Cry1Ac + Cry2Ab genes

Both are Bt cotton varieties using genes from Bacillus thuringiensis

Good to know

Primary target: American Bollworm protection in cotton crops

What is Bollgard?

Bollgard refers to genetically modified cotton varieties developed using Bt technology. These crops contain genes from the soil bacterium Bacillus thuringiensis that produce proteins toxic to specific insect pests, eliminating the need for extensive pesticide spraying.

Bollgard I vs II Comparison

Technology	Approval Year	Bt Genes	Target Pests	Advantage
Bollgard I	2002	Cry1Ac	American Bollworm	India's first biotech crop
Bollgard II	2006	Cry1Ac + Cry2Ab	Bollworms + Spodoptera	Broader pest protection

How Bt Technology Works

Bacillus thuringiensis bacteria naturally produce insecticidal proteins called Cry proteins

These genes are inserted into cotton plants through genetic engineering

When insects eat the plant, Cry proteins bind to their gut receptors causing death

Reduces pesticide use by 30-40% and increases cotton yields

Question Context

This PYQ tests knowledge of India's first approved GM technology. The question asks about the context of Bollgard technologies - they are specifically products of genetic modification, not clonal propagation, growth hormones, or biofertilizers.

Exam traps

Trap: Clonal propagation sounds scientific but refers to reproducing identical plants from parent tissue - not genetic modification

Trap: Plant growth substances are hormones like auxins/gibberellins - completely different from pest resistance genes

Trap: Biofertilizers use beneficial microorganisms for nutrition - not genetic engineering for pest control

Remember: Bollgard = GM cotton, India's first biotech crop approved in 2002

GM Crops in India

Science And Technology

GM Crops in India: Status, Approvals & Regulations

Must know

Bt Cotton is the only GM crop commercially approved in India

GEAC (Genetic Engineering Appraisal Committee) regulates GM crops

Good to know

Bt Brinjal was approved but moratorium imposed in 2010

GM crops cover 95% of India's cotton area

India's GM Crop Journey

India has been cautious with GM crop approvals. While Bt cotton has been a commercial success since 2002, other GM crops face regulatory hurdles due to environmental and food safety concerns.

GM Crop Approval Status

Crop	Technology	Status	Year	Key Point
Cotton	Bollgard I & II	Approved	2002, 2006	Commercial cultivation
Brinjal	Bt Brinjal	Moratorium	2010	Approved but banned
Mustard	DMH-11	Pending	Under review	Herbicide tolerance
Rice	Golden Rice	Trials only	Research stage	Vitamin A enriched

GM Crop Regulation Framework

# GM Crop Regulation
## GEAC
- Final approval
- Environmental clearance
- Commercial release
## RCGM
- Research approval
- Contained trials
- Field trials
## State Govts
- Implementation
- Monitoring
- Compliance
## FSSAI
- Food safety
- Labeling norms
- Import approval

Exam traps

Trap: Don't confuse GEAC (GM crops) with EAC (environmental projects) - different committees

Trap: Bt Brinjal was approved by GEAC but moratorium imposed - not rejected outright

Remember: Only Bt Cotton is commercially grown - no other GM food crops approved yet

Trap: Golden Rice is still in trials - not commercially available in India

Genetic Engineering Methods

Science And Technology genetically modified genetic engineering

Genetic Engineering: Methods & Applications in Agriculture

Must know

Genetic engineering involves transferring genes between different species

Recombinant DNA technology is the core technique used

Good to know

Agrobacterium and gene gun are common delivery methods

Creates transgenic organisms with new traits

Genetic Engineering Process

Genetic engineering creates organisms with new traits by inserting genes from other species. Unlike traditional breeding, it can transfer genes across species barriers - like putting bacterial genes into plants.

GM Crop Development Steps

%%{init: {"flowchart": {"wrappingWidth": 460}}}%%
flowchart TD
  s1["`**Gene Identification**
Identify useful gene (like Cry1Ac from Bacillus thuringiensis)`"]
  s2["`**Gene Isolation**
Extract and clone the target gene using enzymes`"]
  s3["`**Vector Preparation**
Insert gene into delivery vector (plasmid/virus)`"]
  s4["`**Transformation**
Transfer gene into plant cells via Agrobacterium/gene gun`"]
  s5["`**Selection**
Screen transformed cells using marker genes`"]
  s6["`**Regeneration**
Grow whole plants from transformed cells`"]
  s7["`**Testing**
Evaluate trait expression and stability across generations`"]
  s1 --> s2
  s2 --> s3
  s3 --> s4
  s4 --> s5
  s5 --> s6
  s6 --> s7

Gene Transfer Methods

Method	Mechanism	Best For	Example Use
Agrobacterium	Natural bacterial infection	Dicot plants	Bt cotton transformation
Gene Gun	High-velocity DNA bombardment	Monocot plants	GM rice, maize
Electroporation	Electric pulses create pores	Bacterial/yeast cells	Insulin production
Microinjection	Direct injection into cells	Animal embryos	Transgenic mice

Exam traps

Trap: Clonal propagation creates identical copies - genetic engineering creates new combinations

Trap: Don't confuse transformation (gene transfer) with translation (protein synthesis)

Remember: Transgenic means genes from different species - cisgenic means same species

Trap: Marker genes help identify successful transformation - not the actual useful trait

Bacillus thuringiensis (Bt)

Science And Technology

Bacillus thuringiensis: Nature's Pesticide Factory

Must know

Bacillus thuringiensis is a soil bacterium producing insecticidal proteins

Cry proteins are toxic to specific insect groups but safe for humans

Good to know

Used as biological pesticide since 1920s, in GM crops since 1990s

Cry1Ac and Cry2Ab are the genes used in Bollgard cotton

What is Bt?

Bacillus thuringiensis (Bt) is a naturally occurring soil bacterium that produces crystalline proteins lethal to certain insects. These Cry proteins have been nature's pesticide for millions of years.

Major Cry Proteins & Targets

Cry Protein	Target Insects	Used In	Specificity
Cry1Ac	Lepidoptera (moths/butterflies)	Bollgard I cotton	Bollworm, tobacco budworm
Cry2Ab	Lepidoptera (broader spectrum)	Bollgard II cotton	Spodoptera, armyworm
Cry1Ab	European corn borer	Bt corn	Corn-specific pests
Cry3A	Coleoptera (beetles)	Bt potato	Colorado potato beetle

How Bt Toxin Works

%%{init: {"flowchart": {"wrappingWidth": 460}}}%%
flowchart TD
  s1["`**Ingestion**
Insect eats plant tissue containing Cry protein`"]
  s2["`**Alkaline Activation**
Insect's alkaline gut (pH 9-10) activates the toxin`"]
  s3["`**Receptor Binding**
Toxin binds to specific receptors on gut wall`"]
  s4["`**Pore Formation**
Creates pores in gut membrane cells`"]
  s5["`**Cell Death**
Gut cells die, insect stops feeding and dies`"]
  s1 --> s2
  s2 --> s3
  s3 --> s4
  s4 --> s5

Safety & Advantages

Human-safe: Humans lack alkaline gut and specific receptors for Cry proteins

Target-specific: Each Cry protein affects only certain insect groups

Biodegradable: Proteins break down naturally, no soil accumulation

Reduces spraying: Cuts chemical pesticide use by 30-50% in Bt cotton fields

Exam traps

Trap: Bt is the bacterium, Cry is the protein - don't mix up the source and product

Remember: Bt toxin needs alkaline pH to activate - that's why it's safe for humans

Trap: Cry1Ac (single gene in Bollgard I) vs Cry1Ac + Cry2Ab (dual genes in Bollgard II)

Don't confuse: Bacillus thuringiensis (pesticide) with Rhizobium (nitrogen fixation)

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