“We sequenced the oldest ever DNA, from million-year-old mammoths”
In a new study, researchers at Stockholm University show that mammoth DNA as old as 1.2 million years can be recovered from remains found in permafrost deposits. “By sequencing this DNA – studying the make up of its genetic information – we found a lineage of mammoths never described before, the hybrid origin of a mammoth species, and more”, they write in The Conversation.
The article is published in The Conversation on February 17 and is written by David Díez-del-Molino, Postdoctoral Researcher, Centre for Palaeogenetics, Stockholm University, and Love Dalén, Professor in Evolutionary Genetics, Centre for Palaeogenetics, Stockholm University.
They write: We think this finding could have wide implications in the study of how species evolve. There’s an open question in evolutionary biology, whether the rate of adaptation is accelerated during a speciation event – when populations become separate species – or if it’s a more gradual process.
Our data support the latter scenario, where there is no evidence of faster natural selection acting during the origin of the woolly mammoth. And most adaptations characteristic of the woolly mammoth were already present in its ancestral species that roamed the Siberian steppe over a million years ago.
Read a french version of the article in The Conversation: ”Nous avons séquencé le plus ancien ADN au monde, celui de mammouths vieux de plus d’un million d’années”
Last updated: February 18, 2021
Source: Communications Office