Published · 3d agoScience3 min read
5,800 genomes, one map: Vienna team says chromosome change runs one way only
A Science Advances study of more than 5,800 chromosome-scale assemblies places animal genomes in a single coordinate system. The mechanism it leans on cannot be reversed.
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What happened
- A Vienna-led international team reports in Science Advances that animal genomes evolve along a limited set of irreversible paths, not at random.
- The comparison covers more than 5,800 chromosome-scale genomes from 4,454 species in 19 phyla, billed as the largest across the animal tree of life so far.
- Their framework, evolutionary genome topology, projects that material onto one map and compares genome architecture instead of sequence alone.
- The mechanism behind it, named fusion-with-mixing in earlier work, intermingles genes when chromosomes fuse and cannot be undone.
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Why it matters
- capabilityRegions of architecture space a lineage has left are closed to it, so the map supports questions about where a genome can still go, not only where it has been.
- constraintOnly chromosome-scale assemblies can be placed on the map, so the majority of sequenced animals stay outside it until someone pays for the harder sequencing.
Claim ledger
Ranked by verification strength, evidence, and original report placement.
- [1]
A study published in Science Advances by an international team led by scientists from the University of Vienna maps how ancestral genome pieces have been reshuffled across the animal kingdom and finds that animal genomes evolve along a limited set of irreversible 'evolutionary highways'.
ReportedView cited source - [2]
The team analysed more than 5,800 publicly available chromosome-scale genomes spanning 4,454 species across 19 animal phyla, described as the largest such comparison across the animal tree of life to date.
ReportedView cited source - [3]
The team developed a framework called evolutionary genome topology that projects this diversity onto a single map, and it compares genome architecture rather than only DNA sequence, giving researchers a shared coordinate system for chromosome-scale animal genomes.
ReportedView cited source - [4]
At the heart of the patterns is a process the team named 'fusion-with-mixing' in an earlier study: when two chromosomes fuse, their genes intermingle in a way that cannot be undone, leaving a permanent record of the event.
ReportedView cited source - [5]
Because these changes run only one way, they serve as reliable markers of shared ancestry, evidence already used to reveal the sibling group to all other animals.
ReportedView cited source - [6]
Differences in chromosome number across animal groups arise either from the combination of ancestral chromosomes or from their separation, and in both cases fusion-with-mixing leads lineages along very different evolutionary paths.
ReportedView cited source
Sources & coverage · 2 publishers
The reporting this story was synthesized from, earliest first. Every link goes to the original.
- sciencedaily.com17h agoScientists find hidden “highways” guiding animal evolution
Additional citations
- Oleg Simakov, University of Vienna, study co-lead
- Darrin Schultz, Lehigh University, study lead author
