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Scientists create first ‘pangenome’ of Asian rice

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Scientists create first ‘pangenome’ of Asian rice


Asian cultivated rice (Oryza sativa L.) is one of the most important food crops in the world. Representative image.
| Photo Credit: Sandy Ravaloniaina/Unsplash

Scientists have assembled a first of its kind ‘pangenome’, a kind of reference genome, by stitching together key parts of genomes from 144 varieties of wild and cultivated varieties of rice from Asia. Much like the Human Genome Project in 2003 mapped genomes from a range of individuals, expressing the genetic diversity of the human species, the rice pangenome allows researchers to develop new rice cultivars and introduce new traits for disease-tolerance as well as resilience against climate shocks.

Rice is staple for nearly two-thirds of the globe. It is the primary crop grown in India over the monsoon months of June-September. In 2024-25, India produced a record 220 million tonnes of rice over 51,000 ha with an average yield of 4.2 tonnes/ha. Several studies over the years have warned that rising temperatures due to climate change would not only affect yields but also increase arsenic uptake among several rice varieties. India’s average temperature has increased by 0.7º C since 1901. 2024 was the hottest year on record, with the average minimum temperature 0.9º C above the long-term average.

Earlier this month, the Indian Council of Agricultural Research (ICAR) announced the development of two varieties of genome-edited rice, Samba Mahsuri and MTU 1010, that reportedly promise higher yields and better drought resistance. These however are yet to be released into farmer fields.

To develop the pangenome, the scientists — nearly all associated with the Chinese Academy of Sciences — report undertaking a “deep analysis of complex gene flows” both within cultivars (domesticated) and between cultivars and wild rice, highlighting the evolutionary and domestication pathways of various rice types. This study reinforced support for the hypothesis that all Asian cultivated rice had an evolutionary origin from a wild variety called Or-IIIa, the ancestor of japonica.

Asian cultivated rice (Oryza sativa L.) was domesticated from its wild progenitor O. rufipogon, and is one of the most important food crops in the world. Or-IIIa is a variant of O. rufipogon.

While reference genomes of a species generally confine themselves to identifying the characteristic genes that make up a species, a ‘pangenome’ has the common genes as well as maps out the unique genes found in the individual rice varieties. It presents a more complete understanding of the genetic variation present in rice.

Primarily using ‘PacBio high-fidelity’(HiFi) sequencing technology and computational methods, their analysis revealed 3.87 billion base pairs of novel genetic sequences absent from the single acknowledged reference genome, O sativa ssp japonica.

They identified 69,531 genes collectively spanning the pangenome, with 28,907 core genes and 13,728 wild-rice-specific genes.

Population genetics studies have earlier shown that ancient japonica rice was first domesticated from the O. rufipogon group IIIa (Or-IIIa) population in China, and that indica rice was subsequently domesticated when ancient japonica spread southward and westward in Asia and crossed with the local O. rufipogon group I (Or-I) population.

Another key finding of the study was that of the 69,531 genes identified, about 20% were specific to wild rice. These genetic resources can improve understanding of rice environmental adaptation, phenotypic plasticity and regeneration potential. “By bridging the gap between wild and cultivated rice genetics, our study opens new avenues and provides useful wild rice resources for developing superior and more productive rice varieties,” the authors note.

“These improved varieties could incorporate valuable traits from wild rice species, potentially enhancing their resilience to rapid environmental changes.”



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NASA shares stunning image of black hole that devoured a star 600 million light-years ago | Watch | – The Times of India

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NASA shares stunning image of black hole that devoured a star 600 million light-years ago | Watch | – The Times of India


NASA has released a remarkable image of a black hole swallowing a star, revealing the dramatic final moments of a celestial body that ventured too close to one of the universe’s most mysterious objects. The event, known as a Tidal Disruption Event (TDE), occurred 600 million light-years away but has only just become visible to Earth-based telescopes. The image, captured by the Hubble Space Telescope and confirmed with data from the Chandra X-ray Observatory and the Very Large Array radio telescope, shows a bright burst of radiation marking the violent death of the star.This rare cosmic spectacle not only provides a glimpse into the extreme environments around black holes but also opens new avenues for understanding these enigmatic cosmic giants.

What is a Tidal Disruption Event (TDE)

A Tidal Disruption Event occurs when a star passes too close to a supermassive black hole, crossing the critical distance known as the “tidal radius.” At this point, the immense gravitational pull of the black hole overwhelms the star’s self-gravity, pulling it apart in a process known as “spaghettification.” This extreme stretching shreds the star into long, thin streams of gas that spiral around the black hole, forming an accretion disk. The intense gravitational forces and friction within this disk heat the stellar debris to millions of degrees, creating powerful bursts of light, X-rays, and other high-energy radiation that can be detected by Earth-based and space-based telescopes.

NASA’s Hubble captures rare black hole event 600 million light-years away

The recent TDE, labeled AT2024tvd, was detected as a bright, off-center dot in an image taken by the Hubble Space Telescope. NASA shared this striking image on social media, capturing the attention of astronomers and space enthusiasts worldwide. The event took place 600 million light-years away, but the light from this catastrophic incident has only now reached Earth, revealing the violent end of the star.Lead study author Yuhan Yao of the University of California, Berkeley, described AT2024tvd as the first “offset” TDE captured by optical sky surveys, indicating that the black hole involved is likely a wandering black hole, not anchored to the center of a galaxy. This rare observation could reshape current theories about black hole behavior. Yao noted, “AT2024tvd is the first offset TDE captured by optical sky surveys, and it opens up the entire possibility of uncovering this elusive population of wandering black holes with future sky surveys.”

Observing the cosmic event

NASA’s Hubble Space Telescope provided the initial image, while follow-up observations from the Chandra X-ray Observatory and the Very Large Array (VLA) radio telescope confirmed the nature of the event. These powerful observatories captured the high-energy radiation produced as the star was shredded and consumed by the black hole, providing a multi-wavelength view of the destruction.This comprehensive approach to observing TDEs allows astronomers to study the complex physical processes involved, from the initial tidal disruption to the subsequent formation of the accretion disk and the powerful jets that can sometimes emerge from these violent encounters.

Why TDEs are scientifically significant

Tidal Disruption Events are valuable to astronomers because they provide a unique way to detect and study black holes, which are otherwise invisible due to their light-absorbing nature. TDEs reveal the presence of black holes through the intense radiation produced as they consume nearby stars, offering insights into their masses, spin rates, and feeding habits.Ryan Chornock, an associate adjunct professor at UC Berkeley and a member of the ZTF (Zwicky Transient Facility) team, highlighted this importance, stating, “Tidal disruption events hold great promise for illuminating the presence of massive black holes that we would otherwise not be able to detect.”Additionally, TDEs can provide valuable information about the distribution and behavior of stars within galaxies, helping scientists understand the dynamic environments surrounding black holes and the complex interactions that lead to these catastrophic events.

Offset TDEs and their implications

The AT2024tvd observation is particularly significant because it is classified as an “offset” TDE, meaning it likely originated from a black hole that is not located at the center of a galaxy. These wandering black holes are believed to be the remnants of past galaxy mergers, which can dislodge supermassive black holes from their central positions.Yao emphasised the importance of this discovery, noting that it could motivate further searches for similar offset TDEs in future sky surveys, potentially revealing a previously hidden population of black holes that move through intergalactic space.

Future research and observations

This discovery marks an important step in expanding our understanding of black holes and the extreme environments they create. With advancements in telescope technology and ongoing sky surveys, astronomers expect to detect more TDEs in the coming years, providing deeper insights into the life cycles of stars and the hidden population of wandering black holes.The ongoing work by researchers like Yao and Chornock, combined with data from next-generation observatories like the James Webb Space Telescope (JWST) and Vera C. Rubin Observatory, promises to unlock even more mysteries of the universe, potentially revealing new aspects of black hole behavior and their impact on the evolution of galaxies.





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GTA 6 Trailer 2 gets 475 million views; Biggest video launch of all time, says Rockstar: Report

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GTA 6 Trailer 2 gets 475 million views; Biggest video launch of all time, says Rockstar: Report


GTA 6 is set to be the biggest video game launch ever. It has been in development for over a decade, and now we finally have the second trailer for the game. The second trailer was released unexpectedly by Rockstar, just a few days after they revealed the official release date of the game. According to Rockstar, the trailer has amassed over 475 million views across various platforms, the game studio revealed speaking to The Hollywood Reporter.

The second trailer of GTA 6 was released on Tuesday

Massive Jump Compared To First Trailer

The Hollywood Reporter highlights that the first trailer for GTA 6, which was released back in 2023, garnered about 93 million views within the same time frame. However, it’s important to mention that it was a YouTube exclusive at the time, becoming the most popular non-music video launch during that period.

Also Read: iQOO Neo 10 design and key features officially teased on Amazon; India launch imminent – Details

GTA 6 Trailer 2: What Is Different Compared To Trailer 1

The second trailer offers more depth compared to the first, which primarily served as a brief introduction to the game world and its expansive scope. This time, the trailer focuses more on storyline elements, the kind of action players can expect, and introduces central characters, including Jason Duval, Lucia Caminos, Cal Hampton, and Brian Header.

From our analysis, the trailer appears to be a blend of gameplay and cutscenes. Some sequences seem to transition seamlessly from cutscenes into gameplay, with Rockstar cutting between them dynamically. It also showcases better fidelity in graphics compared to the first. Visuals look crisper and more vibrant.

Notably, Rockstar confirmed that all visuals in the trailer were captured on a base PS5 system, not a PS5 Pro or Xbox. So, if you were wondering how the game would look on a base PS5, this trailer provides the answer.

MOBILE FINDER: iPhone 16 LATEST Price, Specs, And More



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Samsung Galaxy F56 vs Vivo V50e: Which smartphone to buy under ₹30000

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Samsung Galaxy F56 vs Vivo V50e: Which smartphone to buy under ₹30000


On Thursday, Samsung launched the new Galaxy F56 5G model in India with a starting price of just Rs.27999. The smartphone comes with a unique design, giving it an attractive look in two new shades of green and violet. The Samsung Galaxy F56 claims to offer powerful performance with the Exynos 1480 chip and some AI features, but does it compete with other smartphones in a similar segment? Well, to gain a better understanding of the features, we have compared the Samsung Galaxy F56 with the new Vivo V50e, which is currently being popularised for its camera capabilities. Therefore, know how Samsung’s new F series model compares to the Vivo V50e.

Know which smartphone is a smartphone purchase under Rs.30000, the Samsung Galaxy F56 or Vivo V50e.(Vivo/ Samsung)

Also read: Samsung Galaxy F56 launched in India with a slim design- Know specs, features, and more

Samsung Galaxy F56 vs Vivo V50e: Design and display

The Samsung Galaxy F56 is marketed as a slim phone with just 7.2mm thickness. The smartphone comes with a glass and plastic build, protected with Corning Gorilla Glass Victus. On the rear panel, we can see the vertically placed camera module housing three sensors, giving a refined look. On the other hand, the Vivo V50e is slightly thickener with 7.4 mm thickness, but it looks quite attractive with its glossy and textured back. The smartphone has a plastic build, but it comes with IP68 and IP69 ratings for dust and water resistance.

For display, the Samsung Galaxy F56 features a 6.7-inch Full HD+ Super AMOLED+ display with 120Hz refresh rate, up to 1200 nits of High Brightness Mode (HBM) and Vision Booster technology. Whereas, the Vivo V50e features a 6.77-inch AMOLED display with a 120Hz refresh rate and up to1800nits peak brightness.

Also read: Samsung Galaxy S25 Edge specs and pricing leaked ahead of May 13 launch – Details

Samsung Galaxy F56 vs Vivo V50e: Performance and battery

The Samsung Galaxy F56 is powered by the Exynos 1480 processor paired with 8GB of LPDDR5X RAM. It is also equipped with a vapour chamber cooling system. On the other hand, the Vivo V50e is powered by the Mediatek Dimensity 7300 chip paired with 8GB RAM. Both offer AI-powered image editing tools. 

For lasting performance, the Galaxy F56 is backed by a 5000mAh battery that supports 45W fast charging. Whereas, the Vivo V50e is backed by a 5600 mAh battery, and it comes with 90W fast charging support.

Also read: Vivo V50e review in 10 points: What’s good and what’s not

Samsung Galaxy F56 vs Vivo V50e: Camera

The Samsung Galaxy F56 features a triple camera setup that consists of 50MP main camera with OIS support, an 8MP ultrawide camera and a 2MP macro lens. For selfies, it features a 12MP front camera. On the other hand, the Vivo V50e features a dual camera setup that includes a 50MP main camera with a Sony sensor and an 8MP ultrawide camera. It also includes a 50MP AF selfie camera.



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