Un estudio de ADN descubre un tercer grupo ancestral en la población japonesa

14 de mayo de 2026

Reportado por IA

Un análisis genético a gran escala ha identificado un tercer grupo ancestral previamente pasado por alto en Japón, desafiando la teoría de los orígenes duales sostenida durante mucho tiempo. Los investigadores vincularon la nueva ascendencia con el antiguo pueblo Emishi del noreste de Japón. Los hallazgos también relacionan el ADN arcaico de neandertales y denisovanos con condiciones de salud modernas.

Científicos del Centro de Ciencias Médicas Integrativas de RIKEN secuenciaron los genomas completos de más de 3,200 personas en siete regiones desde Hokkaido hasta Okinawa. El estudio, publicado en Science Advances, reveló que la población de Japón desciende de tres fuentes ancestrales principales en lugar de dos. La ascendencia de cazadores-recolectores Jomon alcanzó el 28.5 por ciento en Okinawa pero solo el 13.4 por ciento en el oeste de Japón, mientras que el componente recién identificado relacionado con los Emishi se concentró en el noreste.

Artículos relacionados

DNA study supports human arrival in Australia 60,000 years ago

Scientists have found genetic evidence that modern humans reached New Guinea and Australia around 60,000 years ago, backing the long chronology over more recent estimates. The international team, led by researchers at the University of Huddersfield and the University of Southampton, analyzed nearly 2,500 mitochondrial DNA genomes from Aboriginal Australians, New Guineans, and Southeast Asian populations. Their work suggests early migrants used at least two routes through Southeast Asia.

Ancient DNA reveals Neanderthal group in Polish cave

22 de abril de 2026 Reportado por IA

Researchers have analyzed mitochondrial DNA from eight Neanderthal teeth found in Stajnia Cave in Poland, reconstructing the genetic profile of a small group that lived there around 100,000 years ago. The study, published in Current Biology, marks the first such multi-individual genetic picture from a single site north of the Carpathians. The findings show genetic links to Neanderthals across Europe and the Caucasus.

Ciencia

Ancient teeth proteins suggest Homo erectus interbred with Denisovans

América del Sur

Ancient DNA reveals farming shift in Argentina's Uspallata Valley

Salud

Ancient DNA uncovers 12,000-year-old growth disorder in Italian burial

Study indicates male Neanderthals fathered most human-Neanderthal offspring

Genetic analysis suggests that interbreeding between Neanderthals and Homo sapiens involved mostly male Neanderthals and female modern humans. Researchers examined sex chromosomes to uncover this pattern, which occurred during multiple periods after humans left Africa. The findings point to mating preferences as the likely explanation, though experts call for more evidence.

Human skulls have become rounder over past century

30 de abril de 2026 Reportado por IA

Skulls of Japanese people have grown rounder with wider jaws and other changes in the past 100 years, according to a new study. Researchers attribute the shifts to improvements in health, diet, and environment rather than genetics. The findings challenge traditional references for modern human anatomy.

Ciencia