India's First GenomeEdited Rice Varieties: DRR Dhan 100 (Kamala) and Pusa DST Rice 1

 

Introduction 

• India has recently unveiled its first genome-edited rice varieties: DRR Dhan 100 (Kamala) and Pusa DST Rice 1. 
• These varieties of rice were developed by the Indian Council of Agricultural Research (ICAR) utilising cuttingedge genome editing technology, CRISPRCas9. 
• This marks a significant milestone in the field of agricultural development and food security in India.

 

About DRR Dhan 100 (Kamala)

• The DRR Dhan 100 (Kamala) is a rice variety pioneered by ICARIndian Institute of Rice Research in Hyderabad.
• This variety is based upon the popular Samba Mahsuri (BPT 5204) variety. 

 

Features of DRR Dhan 100 (Kamala)

• It promises 19% more yield and matures approximately 20 days earlier than other varieties, taking only 130 days.
• It possesses a firm stem that prevents the plant from falling, allowing significant water conservation – around 7,500 million cubic meters.
• Its genome has been edited to modify the CKX2 (Gn1a) gene, a change that supports larger grain production per plant.
• It emits comparatively less methane due to its quicker growing speed, making it environmentally friendly.

 

About Pusa DST Rice 1

• The Pusa DST Rice 1 is another groundbreaking rice variety formulated by ICARIndian Agricultural Research Institute in New Delhi.
• It uses the MTU 1010 variety as its foundation.

 

Features of Pusa DST Rice 1

• This variety has been genomeedited to enhance its tolerance towards drought and salinity by targeting the DST gene.
• It yields up to 30.4% more in challenging soil conditions.
• It doesn't contain any foreign DNA and is genomeedited using the SDN1 method, as such it doesn't fall under the stringent regulations for Genetically Modified Organisms.

 

Significance of GenomeEdited Rice Varieties

• The introduction of these genomeedited rice varieties can be a gamechanger for the agricultural sector in India.
• Their improved yield and resilience to challenging environmental conditions can increase food security in regions facing water scarcity and soil degradation.
• Additionally, the decrease in methane emissions from these varieties can contribute to achieving sustainability goals.

 

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LICONN (LightMicroscopyBased Connectomics): A new technique for nanoscale brain mapping

 

Introduction and Overview

• LICONN or Light Microscopy Based Connectomics is a groundbreaking imaging technique developed by scientists for nanoscale brain mapping using light microscopes.
• Analytically, it revolves around developing neuronal connections maps at the synapse level.
• The technique is an amalgamation of various disciplines involving hydrogel expansion, protein staining, and AIbased segmentation.

 

Key Features of LICONN

• LICONN contains the capability of expanding brain tissues up to 16 times their original size using specialised hydrogels.
•  Employs the use of fluorescent tagging for highlighting molecular features and advanced deep learning techniques for neural segmentation.
• Notably, the technique can achieve nanoscale resolution with diffractionlimited light microscopy, a feat earlier achievable only through electron microscopy.

 

Significance and Applications of LICONN

• Plays a crucial role in enabling synapselevel connectome mapping, a fundamental part of neuroscientific research.
• Facilitates detailed molecular characterisation of neural pathways, offering novel insights into the intricacies of brain functioning.
•  With its wide range of applications, LICONN can be leveraged in brain disorder research, innovative drug development, and comprehensive understanding of memory processing.

 

Current Relevance of LICONN

• The development of LICONN stands as a significant leap forward in the field of neuroscience, offering new possibilities in understanding the brain's complex functionalities.
• The technique stands as a symbol of scientific advancement, representing the intersection of various fields such as biochemistry, neurology, and artificial intelligence.
• Given the global burden of neurological disorders and the perpetual quest for superior therapeutic solutions, LICONN's potential for usage in brain disorder research and drug development positions it in a prominent limelight.

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Asteroid 2024 YR4

 

Introduction and Description

• Asteroid 2024 YR4, often known simply as YR4, was discovered in December 2024 by the ATLAS telescope based in Chile.
• YR4 is classified as a NearEarth Object (NEO), meaning it has a solar orbit that brings it close to Earth at a distance of approximately 1.3 Astronomical Units (AU) from the Sun. One AU is the average distance between the Earth and the Sun, roughly 93 million miles.
• The asteroid is approximately 65 meters in width, making it equivalent in size to a tenstorey building.

 

Potential Impact and Risk Assessment

• YR4 initially triggered the highestever impact alert by NASA in February 2025 due to an initial estimated 3.1% chance of colliding with Earth. This estimate has since been revised to negligible.
• However, projections were updated revealing a 3.8% chance of collision with the Moon on December 22, 2032. Regardless, there is a significant 96.2% chance that the asteroid will miss.
• If the asteroid did strike, it could potentially create an impact crater ranging from 500 to 2,000 meters and release energy 340 times greater than that of the Hiroshima bomb.

 

Scientific and Strategic Importance

• YR4's near approach to the Earth underscores both the importance of automated detection and early warning systems for Near Earth Objects, and also the constant risk posed by smalltomediumsized asteroids. This is analogous to the Chelyabinsk event in 2013, where an asteroid entered Earth's atmosphere undetected.
• If the asteroid did happen to strike the moon's near side, it would provide an observational opportunity for spacecraft like Chandrayaan2 to study the impact flash.
• Public awareness of asteroids and their potential risks is vital, with experts asserting that an asteroid collision is the only natural disaster that could potentially be prevented with enough forewarning. The asteroid YR4 thus offers a proactive context to raise public awareness about the possibility and prevention of such celestial events.

 

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India's First GeneEdited Sheep: A Step towards Advancements in Genomic Science

 

Introduction and About

• Researchers in Kashmir have developed India's first geneedited sheep using CRISPRCas9 technology, a breakthrough in biotechnology, and genetic science. 
• The project was funded by the Indian Council of Agricultural Research (ICAR).
• The sheep developed is not transgenic as it contains no foreign DNA.

 

Why in the News

• The developed sheep is the firstever of its kind in India which used geneediting technology.
• The myostatin gene of a local Merino lamb was edited, resulting in a 30% increase in muscle mass, making it similar to European Texel sheep.

 

About Gene Editing

• The process of gene editing involves precise modification of the DNA or RNA of the organism. 
• Through gene editing, scientists can add, delete, or alter specific gene sequences using specialised tools.

 

Prominent Gene Editing Methods

• Genome editing is accomplished through several methodologies including CRISPRCas9 and Zinc Finger Nucleases (ZFNs).
• CRISPRCas9 employs guide RNA to steer the Cas9 enzyme to the required DNA sequence where a doublestrand cut is made; subsequent cell repair enables gene disruption or insertion.
• The 2020 Nobel Prize in Chemistry was awarded to Emmanuelle Charpentier and Jennifer A. Doudna for developing this method.
• In contrast, ZFNs are artificial tools consisting of a DNAbinding domain (zinc finger proteins) and a DNAcleaving domain (FokI endonuclease) used to cut and bind specific DNA sequences. 
• The Role of Gene Knockout in Genetic Studies
• Gene Knockout is a technique used to disable or delete specific genes to halt protein expression.
• By comparing traits among organisms with and without the 'knockedout' gene, scientists can gain a better understanding of gene function. This technique has been instrumental in studying genetic traits, mapping genomics, and understanding gene therapy. 

 

Importance & Impact on Biotechnology

• The development of geneedited sheep marks a significant milestone in India in the field of biotechnology and genomics, bringing the potential of improved characteristics in livestock.
• This breakthrough opens up new possibilities for gene editing in India, setting a precedent for future genomic projects and research.

 

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ICMR's Launch of the First Stigma Scale for Sickle Cell Disease

 

Introduction to ICMRSCD Stigma Scale

• The Indian Council of Medical Research (ICMR) has launched the country's first stigma scale for Sickle Cell Disease (SCD) titled ICMRSCD Stigma Scale for India (ISSSI). 
• It aims at assessing and addressing the stigma faced by SCD patients and their caregivers. 
• ISSSI consists of two components: one for patients (ISSSIPt) and another for caregivers (ISSSICg).

 

Key Features of ICMRSCD Stigma Scale for India

• The tool is multidimensional, assessing stigma across five areas: familial/reproductive stigma, disclosure issues, illness burden, discrimination, and healthcare stigma.
• It has been developed with sensitivity to India's cultural diversity, having been created in six SCDendemic districts to reflect the country's tribal, regional, and linguistic variation.
• The necessity of a locally relevant tool was due to the unsuitability of three existing SCD stigma scales from Africa and America, which don't cater to India's unique phenotypic, sociocultural, and contextual differences.
• ISSSI is validated and reliable, being psychometrically robust and suitable for clinical use, research, and policy evaluation.

 

Overview of Sickle Cell Disease

• Sickle Cell Disease (SCD) is a hereditary blood disorder resulting from a genetic mutation in the haemoglobin gene.
• The disease leads to the creation of abnormal, crescent or sickleshaped red blood cells instead of the typical round shape, which do not move easily through small blood vessels.
• Due to impaired blood circulation, patients can suffer from anaemia, severe pain, organ damage, and a reduced lifespan.

 

Treatment and Prevalence of Sickle Cell Disease in India 

• Treatment options for SCD include gene therapy through bone marrow or stem cell transplantation, blood transfusions, and various medications.
•  India has the second largest burden of SCD in the world, ranking third globally in SCD births after Nigeria and the Democratic Republic of the Congo.
• Over one million individuals are affected by the disease in India, particularly found within the tribal belt spanning Odisha, Jharkhand, Chhattisgarh, Madhya Pradesh, and Maharashtra.

 

Government Actions to Handle Sickle Cell Disease

• Government initiatives such as the National Sickle Cell Anaemia Elimination Mission and the National Health Mission (NHM) 2013 have placed special focus on SCD.
•  The National Guidelines for Stem Cell Research 2017 restricts the commercialisation of stem cell therapies outside of clinical trials, except for Bone Marrow Transplantation (BMT) for SCD.
•  Under the Rights of Persons with Disabilities (RPwDs) Act, 2016, SCD is listed among the 21 disabilities that qualify for reservation benefits.

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Understanding the PSLVC61/EOS09 Mission

 

INTRODUCTION AND DETAILS ABOUT PSLVC61/EOS09 MISSION

• This highlights ISRO's PSLVC61 EOS09 mission, featuring the Polar Satellite Launch Vehicle's (PSLV) attempt to launch the Earth Observation Satellite09 (EOS09) into its intended sunsynchronous polar orbit. 
• The mission had a setback as a technical issue in the third stage of the rocket prevented the successful deployment of EOS09.
• This was noted as ISRO’s 101st mission, and it was the 63rd time a PSLV was used. 
• EOS09 contained equipment crucial for capturing earth's images in all weather conditions, courtesy of its Synthetic Aperture Radar (SAR) payload.

 

DEFINITION AND SIGNIFICANCE OF PSLV

• The Polar Satellite Launch Vehicle, popularly known as PSLV, is a robust and cost-effective launch vehicle built by ISRO.
• Its functional role is to transport satellites into different orbits such as sunsynchronous, geostationary, and navigation orbits.
• The PSLV is structured into four stages and uses varied propulsion systems to ensure the satellite's successful launch into space.
• It is famed as ISRO’s 'workhorse' and has been a critical part of significant ISRO missions over the years, largely due to its versatility and high success rate. 
• The PSLV is globally renowned for achieving a world record by launching 104 satellites in a single mission back in 2017.
•  It is worth noting that the PSLV has failed twice in history due to different reasons.

 

KNOW MORE ABOUT EOS09

• The EOS09 or RISAT1B is an advanced earth imaging satellite of Indian origin furnished with a Synthetic Aperture Radar (SAR).
• The EOS09 skillfully navigates all weather conditions, capturing clear images of Earth day and night using its Cband SAR. 
• Having a high resolution of up to 1 meter, wide swath coverage, and five different imaging modes, the EOS09 has a wide range of applications, including landuse mapping, hydrology, disaster management, agriculture, forestry, and coastal security.
• With potential for dualuse, the EOS09 also has the capacity to aid in defense surveillance, contributing to monitoring military activity and maritime safety.
• The EOS09 was intended to be placed in a subsynchronous polar orbit to ensure reliable daily coverage.

 

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Indian Yak Genomics and Its Implication 

 

About Indian Yak Genomics

• Indian scientists for the first time have successfully sequenced the genome of an Indian Yak (Bos grunniens).
• The undertaking represents a milestone in the biomedical research and agriculture industry.
• The scientists utilised longread sequencing technology and sophisticated bioinformatics.

  

The Role of LongRead Sequencing and Bioinformatics

• Longread sequencing is a method that the scientists employed to identify long series of DNA, spanning up to millions of base pairs. This differs from shortread sequencing that ordinarily deals only with 100–300 base pairs.
• As an interdisciplinary field, bioinformatics demonstrates the combined capabilities of biology, computer science, and mathematics, geared towards the analysis and interpretation of large biological datasets like DNA, RNA, and protein sequences.

 

Benefits of the Genomics Study

• The unique study paves the way for allele mining to occur, offering an improved understanding of scientific research and aiding local livestock management.
• Allele mining refers to the identification of genetic variations which are linked with desirable traits, such as disease resistance, drought tolerance, or high yield across or within species.

 

Geographical Distribution and Importance of Indian Yak

• Indian yaks predominantly reside in areas that exceed 7,000 feet. Notable habitats include Ladakh, Sikkim, Arunachal Pradesh, and Himachal Pradesh. 
• In 2022, Food Safety and Standard Authority of India (FSSAI) officially recognised the Himalayan Yak as a 'food animal'. This paves the way for the yak to be used in food production or consumption.
• FSSAI's move is viewed as a measure to curb the dwindling population of the species while expanding the economic activities facilitated by yak rearing.
• The classification of yak as a 'food animal' allows it to be reared specifically for food production, granting economic stability to the yak breeders of these elevated regions.

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