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GS Paper: GS3

  • Ashok Gulati writes: How subsidies for paddy in Punjab are choking Delhi

    Stubble burning: Why it continues to smother north India - BBC News

    Central idea 

    The Supreme Court addresses urgent concerns over Delhi’s severe air pollution, emphasizing the need to immediately halt stubble burning in neighboring states like Punjab. Stubble burning, contributing nearly 38% to pollution, poses health risks, and the court advocates for swift measures, including economic incentives, to shift farmers away from paddy cultivation.

    Key Highlights:

    • Supreme Court urges adjoining states to curb stubble burning as Delhi’s air quality index breaches 400.
    • Biomass burning, particularly stubble burning, contributes significantly to Delhi’s pollution, posing health risks and potential loss of 11.9 years of life for residents.
    • Urgent action required to control stubble burning in Punjab, which accounts for a major portion of pollution.

    Challenges:

    • Stubble burning persists despite attempts to stop, revealing a breakdown in law and order.
    • Inefficient alternatives and lack of farmer incentives contribute to the continuation of stubble burning.
    • Over-reliance on rice and wheat in the Public Distribution System leads to environmental harm and health issues.

    Key Phrases:

    • Decision Support System for air quality management.
    • Air Quality Life Index report by the University of Chicago’s Energy Policy Institute.
    • Greenhouse gas emissions from paddy cultivation in Punjab.
    • Subsidy on paddy cultivation and its impact on farmers’ choices.

    Analysis:

    • Biomass burning, especially stubble burning, is a major contributor to Delhi’s pollution, overshadowing the impact of transport and construction.
    • The Supreme Court emphasizes the need to cut paddy cultivation in Punjab-Haryana and suggests alternatives to curb stubble burning.
    • Economic incentives and policy changes are crucial to wean farmers away from paddy cultivation and address environmental concerns.

    Key Data:

    • Biomass burning, mainly stubble burning, accounts for 37.85% of Delhi’s pollution.
    • Punjab farmers receive a subsidy of almost Rs 30,000/ha for paddy cultivation.
    • Loss of 11.9 years of life for Delhi residents due to pollution.

    Key Facts:

    • The water table in Sangrur, Punjab, has gone down by 25 meters in the last 20 years.
    • Stubble burning remains a significant challenge despite efforts by officials.

    Key words for mains answer value addition:

    • Stubble burning.
    • Public Distribution System.
    • Decision Support System.
    • Air Quality Life Index.
    • Greenhouse gas emissions.

    Way Forward:

    • Implement strong measures to control stubble burning, making the local Station House Office (SHO) responsible.
    • Incentivize farmers to switch from paddy to pulses, oilseeds, and millets to create a crop-neutral incentive structure.
    • Encourage private sector investment in ethanol plants based on maize to reduce reliance on paddy and lower air pollution from vehicular traffic.
    • Limit paddy procurement by state agencies in areas with fast-depleting water tables and where farmers continue stubble burning.
    • Promote a diversified market by offering nutritious crops through fair price shops, reducing reliance on rice and wheat and minimizing environmental impact.

  • National Coal Index (NCI) surges this Month

    Central Idea

    • In a recent development, the National Coal Index (NCI) saw a substantial rise in September, marking its first increase since April 2023.
    • This surge in the NCI is linked to global coal price fluctuations and holds significant implications for India’s coal sector.

    Understanding the National Coal Index (NCI)

    • What is it? The NCI is a price index which reflects the change in the price level of coal on a particular month relative to the fixed base year.
    • Release: It is released every month by the Ministry of Coal.
    • Launch: The NCI was introduced on June 4, 2020, as a tool to monitor coal price fluctuations relative to a fixed base year FY 2017-18.
    • Price Indicator: The NCI serves as a crucial price indicator that combines coal prices from various sources, including notified prices, auction prices, and import prices.
    • Basis for Premiums: It plays a vital role in determining premium rates, either on a per-tonne basis or through revenue sharing, using a market-based approach.

    Components of NCI

    • Sub-Indices: NCI comprises five distinct sub-indices, encompassing three for Non-Coking Coal and two for Coking Coal. These sub-indices are amalgamated to derive the final Index for Non-Coking and Coking Coal, making them distinctly separate.
    • Customized Revenue Shares: Based on the coal grade associated with a mine, the relevant sub-index is employed to determine the revenue share.

    Factors behind the NCI Surge

    • Global Price Impact: The recent uptick in the NCI is primarily influenced by a temporary rise in global coal prices, which has reverberated in the Indian coal market.
    • Seasonal Demand: With the festive season and winter approaching in India, the demand for coal has risen, prompting coal producers to boost domestic production to meet the growing energy needs.
    • Power Sector Growth: India has experienced a surge in coal demand, particularly from the power sector, driven by increased electricity requirements.
    • Continued Coal Imports: Power plants have continued to import coal as part of the coal blending mandate set by the power ministry.

  • What is Stable Auroral Arc?

    stable aurora arc

    Central Idea

    • Recently, the Indian Astronomical Observatory (IAO) in Ladakh has astounded the world with mesmerizing images of a rare red-colored aurora, known as a Stable Auroral Arc (SAR).

    What is Stable Auroral Arc (SAR)?

    • Rare Phenomenon: SAR is a unique atmospheric occurrence witnessed during a potent G3-class geomagnetic storm.
    • Unconventional Origins: Unlike typical auroras resulting from space borne charged particles colliding with the atmosphere, SAR arcs have a distinct genesis.
    • Sign of Energy Flow: SAR arcs signify the transfer of heat energy into the upper atmosphere from Earth’s ring current system, a circular pathway carrying massive electrical currents encircling our planet.
    • Geomagnetic Storm Influence: During the recent geomagnetic storm, the ring current was dynamically charged due to prolonged intense geomagnetic activity, leading to the manifestation of SAR arcs.
    • Global Impact: This celestial event left its celestial mark across several regions worldwide.

    How is it formed?

    • Solar Wind Interaction: Aurora formation begins when the sun emits charged particles from its corona, creating solar wind. Upon colliding with Earth’s ionosphere, the mesmerizing aurora takes shape.
    • Northern and Southern Counterparts: In the Northern Hemisphere, it’s recognized as the northern lights (aurora borealis), while in the Southern Hemisphere, it’s referred to as the southern lights (aurora australis).
    • Magnetic Dance: The varying appearance of auroras in different hemispheres is attributed, in part, to the intricate interplay between the sun’s magnetic field and Earth’s magnetic field.

  • Best of Both Sides: To combat pollution, use of personal vehicles must decrease

    Urban Air Pollution: Sources and Pollutants - Airqoon - Cost effective and easy to use air monitoring at scale

    Central idea

    Delhi grapples with severe smog, prompting emergency measures to curb pollution, including restricting vehicles. Despite past efforts to mitigate vehicular emissions, the city faces challenges in reducing dependence on personal vehicles. The article emphasizes the need for stronger political will, effective restraints, and enhanced public transport to address the persistent air quality and mobility crisis in Delhi.

    Key Highlights:

    • Delhi faces severe smog, prompting emergency measures to curb pollution, including restrictions on vehicles.
    • Vehicles contribute significantly to Delhi’s air pollution, with official data indicating a 40% emission of particulate load.
    • Despite previous efforts, vehicular emissions remain challenging to mitigate, with over 80 lakh on-road vehicles in Delhi.

    Challenges:

    • Cumulative emissions from increasing vehicle numbers and congestion undermine emission improvements per unit.
    • Personal automobile dependence persists, with a 47% growth in car numbers during 2022-23.
    • The shift to public transport is hindered by inadequate infrastructure, low passenger numbers per bus, and a lack of effective restraints on personal vehicle usage.

    Key Phrases:

    • “Crippling mobility crisis” in Delhi due to emergency measures restricting vehicles.
    • “Gut reaction” to underplay the role of vehicles in air pollution amid public criticism.

    Analysis: The article underscores the persistent challenge of vehicular emissions in Delhi, despite past efforts to curb pollution. It highlights the need for a substantial shift to public transport to address the mobility crisis and reduce dependence on personal vehicles.

    Key Data:

    • Over 80 lakh on-road vehicles in Delhi, with car numbers witnessing a 47% growth in 2022-23.
    • Transport diesel consumption reduced by 46% between 2014 and 2022.
    • Only 7,041 buses against the mandated 10,000, with a 48% drop in passengers carried per bus since 2017-18.

    Key Facts:

    • Despite emission improvements, Delhi’s air quality remains a concern, leading to emergency measures.
    • Public transport ridership faces challenges, with a drop in passengers per bus and increased empty kilometres.
    • The article emphasizes the need for stronger political will to restrain personal vehicle usage and promote public transport.

    Way Forward:

    • Strengthen political will to implement effective restraints on personal vehicle usage, such as parking rules and congestion pricing.
    • Focus on making integrated public transport more convenient, accessible, and affordable.
    • Implement scalable solutions, including a dense street network for walking and cycling, and housing closer to transit nodes.

  • Acknowledge India’s economic successes too

    Indian Economy To Grow By 7-7.8 Pc In FY23 Despite Global Headwinds: Experts - Goodreturns

    Central idea

    India’s robust economic growth faces challenges in digital inclusion, governance equity, and managing post-COVID-19 effects. Government initiatives, encompassing reforms, infrastructure focus, and poverty alleviation, drive progress. Recognizing successes and addressing shortcomings is vital for informed public discourse and sustained development momentum.

    Key Highlights:

    • Impressive Economic Growth: India’s post-COVID-19 economic growth is remarkable, with FY2023 showing a YoY growth of 7.2%, the fastest among major economies.
    • Policy Reforms Driving Growth: Government initiatives, including economic liberalization, Insolvency and Bankruptcy Code (IBC), demonetization, GST, and corporate tax reduction, have propelled India’s economic trajectory.
    • Inclusive Growth Focus: The government’s commitment to “Sabka Saath Sabka Vikas” reflects in poverty alleviation, rural welfare, and inclusive growth measures, leading to improved living standards.
    • Multidimensional Poverty Reduction: NITI Aayog’s report indicates a significant reduction in multidimensional poverty, with 13.5 crore Indians escaping poverty between 2015-16 and 2019-21.
    • Agricultural Success: Support for agriculture has resulted in unprecedented growth in fruits, vegetables, dairy, livestock, and fishery, enhancing the nutritional value of the food basket.

    Challenges:

    • Critique of Growth Metrics: Some critics argue for using compound annual growth rates post-COVID-19, questioning the validity of YoY growth rates as a true measure of economic progress.
    • Long Road to High-Income Status: Acknowledging the challenges, India recognizes the need for sustained efforts to achieve high-income status and a high quality of life for its citizens.

    Key Phrases for mains value addition:

    • “Fastest-growing major economy”: The tagline emphasizes India’s rapid economic growth in the global context, driven by its large size and robust domestic demand.
    • “Sabka Saath Sabka Vikas”: The government’s inclusive growth mantra focusing on uplifting people above the poverty line through various support initiatives.
    • “Multidimensional Poverty”: NITI Aayog’s report highlights a significant decline in multidimensional poverty, reflecting comprehensive progress.

     

    Analysis:

    The article underscores the importance of considering YoY growth rates as a measure of post-pandemic progress and highlights the success of government reforms in driving economic growth and inclusive development.

    Key Facts/Data for value addition:

    • India is the fifth largest economy globally and projected to become the third largest by 2027.
    • The Capex budget of the central government has risen from 1.6% of GDP in FY19 to 2.7% in FY23, further budgeted to increase to 3.3% in FY24.

    Government Measures Since 2014:

    • Government initiatives post-2014 aim to boost the economy, including liberalization, the Insolvency and Bankruptcy Code, demonetization, GST rollout, and corporate tax reduction.
    • In FY22, a substantial Capex program and state-level resource support aimed to bridge infrastructure gaps and attract private corporate investment.

    Poverty Alleviation and Rural Welfare:

    • Government commitment to ‘Sabka Saath Sabka Vikas’ reflects a focus on inclusive growth, poverty reduction, skill development, and infrastructure enhancement.
    • NITI Aayog’s report highlights a significant reduction in multidimensional poverty, particularly in rural areas, with improved living standards and health indicators.

    Innovative Way Forward:

    • Digital Inclusion for Economic Growth: Accelerate digital inclusion strategies to empower citizens, enhance education, and facilitate online business, fostering economic growth.
    • Green Infrastructure Development: Prioritize sustainable and green infrastructure projects, aligning with global environmental goals, to ensure long-term economic resilience.
    • Blockchain for Financial Inclusion: Leverage blockchain technology to enhance financial inclusion, enabling secure and transparent transactions, especially in rural and underserved areas.
    • AI-driven Skill Development: Implement artificial intelligence (AI) in skill development programs, customizing learning paths and enhancing employability in emerging sectors.

     

  • Pusa-2090: A Potential Solution to Stubble Burning  

    Pusa-2090

    Central Idea

    • In response to stubble burning challenge, the Indian Agricultural Research Institute (IARI) has developed Pusa-2090, an improved version of Pusa-44, offering similar yields but with a shorter maturity period.

    About Pusa-2090

    • Development: IARI developed Pusa-2090 by crossing Pusa-44 with CB-501, an early-maturing Japonica rice line known for stronger stems and higher grain production.
    • Advantages: Pusa-2090 offers the same high yields as Pusa-44 but matures in just 120-125 days, addressing the stubble-burning issue.
    • Field Testing: The variety has undergone successful trials in Delhi and Odisha, and Punjab farmers have reported promising results.
    • Economic Benefits: Pusa-2090’s potential to match Pusa-44’s yields with a shorter duration makes it an attractive option for farmers.

    Replacing Pusa-44

    • Pusa-44 in Punjab: In the current kharif season, Punjab has planted 5.48 lakh hectares with Pusa-44, accounting for over 17% of the state’s total paddy area.
    • Long Maturation Period: Pusa-44 takes 155-160 days to mature, delaying the availability of fields for the next wheat crop.
    • Stubble Burning: To prepare fields for the next crop, farmers resort to burning the remaining stubble after harvesting Pusa-44, contributing to air pollution.
    • Alternative Varieties: While there are alternative varieties like PR-126 with a shorter maturation period, their yields are lower than Pusa-44, impacting farmers’ income.

  • Kerala rolls out Organic Farming Mission  

    Central Idea

    • In a proactive move towards sustainable and climate-smart farming, the Kerala Government has launched the Organic Farming Mission.

    Kerala Organic Farming Mission 

    Objective Expand organic farming to 5,000 hectares in 5 years
    Annual Target Convert 1,000 hectares annually
    Governance Structure Governing council chaired by Agriculture Minister

    Executive committee with government and farm sector reps
    Area Allocation State Agriculture department’s farms allocate 10% for organic
    Long-term Commitment Beneficiaries commit to organic farming for at least 5 years
    Certification & Marketing Enhance certification, branding, and marketing

    Implement organic farming protocols aligned with standards
    Value Addition Focus on adding value to organic products
    Access to Resources Ensure access to quality seeds and production equipment

    Utilize various channels like small-scale units, collectives,Karshika Karma Sena, Kudumbasree, Krishisree Centre, Agro Service Centres
    Local Engagement Collaborate with Krishikoottam collectives and FPOs
    Complementary Mission Poshaka Samriddhi Mission dedicated to millet and vegetable production for sustainable agriculture

    Complementary Mission: Poshaka Samriddhi

    • In addition to the Organic Farming Mission, the Kerala Government created the Poshaka Samriddhi Mission in September 2023.
    • This initiative is dedicated to ramping up millet and vegetable production, furthering the state’s commitment to sustainable agriculture.

  • Challenges and Ambiguities in Biotechnology Policy for GM Insects

    insect

    Central Idea

    • In April 2023, the Department of Biotechnology (DBT) issued the ‘Guidelines for Genetically Engineered (GE) Insects’.
    • The guidelines note that GE insects are becoming globally available and are intended to help Indian researchers navigate regulatory requirements.
    • However, the guidelines don’t specify the purposes for which GE insects may be approved in India or how the DBT, as a promoter of biotechnology, envisions their use.

    Genetically Modified Insects (GE Insects)

    • A genetically modified insect is any insect whose genetic material has been altered using genetic engineering techniques.
    • GE insects offer multiple benefits, such as reducing disease burden, ensuring food security, and conserving the environment.
    • India’s bioeconomy contribution is expected to reach 5% of GDP by 2030, and GE insects play a crucial role in achieving this goal.
    • GE insects find applications in vector management, crop pest control, healthcare product production, and genetic improvement of beneficial insects.

    Guidelines for GM Insects

    • Nodal Agency: The Department of Biotechnology (DBT) under the Ministry of Science and Technology (MoST) is the nodal agency and promoter of biotechnology in India.
    • Purpose: The Guidelines provide procedural roadmaps for those interested in creating GE insects.
    • Harmonization: The guidelines have been harmonized with guidance from the World Health Organization on GE mosquitoes, emphasizing their potential applications in disease control.

    Why discuss this?

    • India’s bioeconomy, currently contributing 2.6% to the GDP, aspires to reach 5% by 2030, requiring substantial investment and supportive policies.
    • However, the Department of Biotechnology (DBT) faces challenges in both funding and policy alignment with these goals.

    Challenges in Biotechnology Funding

    • Stagnating Funding: Biotechnology funding in India has stagnated, with no return to pre-pandemic levels. The current allocation stands at a mere 0.0001% of India’s GDP, insufficient to drive meaningful growth.
    • Impact on Pandemic Preparedness: Inadequate funding hampers pandemic preparedness efforts, undermining national interests and health security.
    • Lack of Private Investment: Attracting private investment for biotechnology research and development is challenging and necessitates enhanced funding efforts.

    Policies for a Thriving Bioeconomy

    Guidelines for Genetically Engineered (GE) Insects: In April 2023, the DBT released guidelines for GE insects, offering procedural guidance but revealing three key issues.

    (1) Uncertainty of Purpose

    • The guidelines lack clarity regarding the purposes for which GE insects may be approved in India, hindering alignment with the broader bioeconomy commitment.
    • Emphasis is placed on improving disease management, food security, and environmental conservation, but the economic potential of GE insects is underemphasized.

    (2) Uncertainty for Researchers

    • The guidelines only apply to research and not confined trials or deployment, limiting researchers’ options.
    • Deployment of GE insects requires community engagement and monitoring due to potential environmental impacts, but criteria for approval remain unclear.
    • The absence of clarity on government support for specific insect applications discourages research investment.

    (3) Uncertainty of Ambit

    • Ambiguity surrounds the definition of ‘beneficial’ GE insects, creating uncertainty among funders and scientists.
    • Lack of precise guidelines inhibits progress, particularly in a country with limited public and private funding.
    • Inadequate consideration of potential misuse or unintended consequences adds to the uncertainty.

    Way forward

    • To achieve the ambitious bioeconomy goals set out in the Bioeconomy 2022 report, India must address challenges in biotechnology funding and policy alignment.
    • Increased funding, private sector engagement, and clear, supportive policies are essential.
    • The guidelines for GE insects should reflect economic opportunities and research priorities, fostering a thriving bioeconomy that benefits India’s society, economy, and environment.

  • India’s Air Quality Management needs Transboundary Accountability

    airshed

    Central Idea

    • The annual recurrence of ‘severe’ air quality levels in the Delhi-National Capital region and surrounding areas during winter often leads to the misconception that air pollution is a seasonal issue primarily driven by farm residue burning.
    • However, this perception falls short of the complex, year-round, multi-source, and multi-pollutant nature of the problem.

    This article highlights the need to adopt a comprehensive, science-backed approach to address air pollution effectively.

    Year-round, Multi-source Pollution

    • Misconception: Labelling air pollution as a ‘winter’ problem caused solely by farm residue burning oversimplifies the issue.
    • Complex Reality: Air pollution is a continuous problem arising from various sources, not confined to a particular season.
    • Ineffectiveness of City-Centric Strategies: Current initiatives like the National Clean Air Programme (NCAP) focus on cities, ignoring the transboundary nature of pollution.

    Transboundary Air Pollution

    • Understanding Dispersion: Pollution emitted in one region can significantly impact air quality in another due to transboundary dispersion.
    • Inter-state Implications: Weather, topography, and climatic conditions influence transboundary dispersion, creating challenges for downwind regions.
    • Limited Jurisdictional Power: Downwind regions often lack the authority to regulate upwind pollution sources, rendering mitigation strategies ineffective.

    Need for Airshed Air Pollution Management

    • Defining Airsheds: An airshed is a geographic area governed by common meteorology, topography, and climate, impacting air mass dispersion.
    • Global Precedents: Countries like the United States, China, and the European Union have implemented effective regional airshed-level frameworks.

    Policy Levers in India

    • Existing Legal Framework: The Commission for Air Quality Management in National Capital and Adjoining Areas (CAQM) Act, 2021 recognizes the transboundary nature of air pollution.
    • Expanding Scope: The Air Act, 1981, can be expanded to cover multiple jurisdictions and pollution sources under a single air quality management framework.
    • Global Experiences: Drawing lessons from frameworks like the Cross-State Air Pollution Rule (CSAPR) in the US and the Long Range Transboundary Air Pollution (LRTAP) in Europe can inform India’s approach.

    Implementation Challenges

    • Accountability: Holding upwind polluting regions accountable for transboundary pollution remains a challenge, necessitating legal mechanisms and cooperation.
    • Conflict Resolution: Implementing a formal procedure for resolving conflicts arising from the interpretation or application of airshed-level frameworks is crucial.
    • Political Will: Ensuring consistent implementation of air quality management measures despite bureaucratic cycles and political considerations is a persistent challenge.
    • Cross-Boundary Cooperation: Encouraging cooperation between jurisdictions and regions to collectively address air pollution requires coordinated efforts.
    • Data Integration: Integrating data from diverse sources and ensuring uniformity in air quality monitoring can be challenging.

    Way Forward

    • Legal Framework Expansion: Expanding the scope of the Air Act, 1981, to encompass multiple jurisdictions and pollution sources under a single air quality management framework.
    • Global Lessons: Drawing lessons from international frameworks like the Cross-State Air Pollution Rule (CSAPR) and Long Range Transboundary Air Pollution (LRTAP) to inform India’s approach.
    • Accountability Measures: Legally binding upwind polluters to address transboundary pollution through mitigation plans.
    • Scientific Independence: Separating scientific and technical activities from political negotiations to ensure data-driven decisions.
    • Conflict Resolution Mechanism: Implementing a mechanism for resolving disputes arising from framework interpretation or application.
    • Promoting Change: Integrating an airshed-level framework within existing legal structures or introducing a new framework to deliver cleaner air for citizens.

  • Genetics of Silk Moth Domestication

    silk

    Central Idea

    • Silk, often hailed as the queen of fibers, boasts a rich and diverse history, with roots stretching back over 5,000 years to ancient China.
    • Its story encompasses the transition from the wild silk moth (Bombyx mandarina) to the domesticated silk moth (Bombyx mori), offering a fascinating glimpse into human ingenuity and nature’s adaptability.

    Silk Moth Domestication

    • Ancient Beginnings: Humans began domesticating silk moths from the wild Bombyx mandarina in China, marking the dawn of sericulture.
    • Global Reach: The domesticated Bombyx mori moth, significantly larger than its wild ancestor, now thrives worldwide, including in India.
    • Silk Powerhouse: India’s prowess in silk production makes it the second-largest raw silk producer globally, after China.

    Silkworms and Mulberry Leaves

    • Exclusive Diet: Caterpillars, known as silkworms, feed solely on the leaves of mulberry plants (genus Morus).
    • Cocoon Construction: The domesticated silk moth extrudes silk fibers of remarkable length, up to 900 meters, to construct larger cocoons. These caterpillars have lost the ability to fly and their pigmentation, adapting to human care.

    Diversity in Silk

    • Wild Silk Varieties: “Wild” silks, including muga, tasar, and eri, are derived from various moth species such as Antheraea assama, Antheraea mylitta, and Samia cynthia ricini.
    • Contrasting Characteristics: Non-mulberry silks differ significantly from mulberry silks, featuring shorter, coarser, and harder threads.

    The Enigmatic Cocoon Colors

    • Natural Variations: Domesticated silk moth cocoons come in a stunning array of colors, including yellow-red, gold, flesh, pink, pale green, deep green, and white.
    • Human Influence: Selective breeding for differently colored cocoons aimed to create colored silks, but these pigments are water-soluble, eventually fading. Acid dyes are used to achieve colored silks in the market.
    • Origins of Pigments: Pigments in cocoons are derived from carotenoids and flavonoids produced by mulberry leaves. Silkworms ingest these chemicals, which are then bound to silk proteins and spun into a single fiber.

    Mutant Strains and Genetic Insights

    • Valuable Resource: Mutant strains of silk moths have emerged due to mutations in genes governing pigment uptake, transport, and modification.
    • Diversity from Domestication: Silk domestication’s molecular basis has been primarily explored in China and Japan, with notable contributions from Indian scientists.

    Decoding Cocoon Colors: A Model Emerges

    • Genetic Factors: Researchers at Southwest University in Chongqing, China, proposed a model explaining how different mutations create diverse cocoon colors.
    • Key Genes: Genes like Y, C, F, Rc, and Pk play roles in pigment transportation and absorption, leading to variations in cocoon colors.
    • Green Cocoon Mystery: Mutations in the Y gene result in green cocoons when carotenoids are not absorbed, but flavonoids are. The intensity of green depends on other genes’ mutations, affecting flavonoid uptake.
    • Flavonoid Cluster: A cluster of closely related genes influences flavonoid uptake in cocoons.

    Gene Manipulation and Domestication

    • Hybrid Offspring: Researchers have created hybrid moths by interbreeding domesticated and ancestral silk moths.
    • Apontic-like Gene: Mutations in the apontic-like gene revealed differences in melanin production between domesticated and wild silk moths.
    • Regulatory Sequences: Variations in gene regulation sequences dictate when and where genes are activated or deactivated.