Genome duplication enabled plant resilience during Cretaceous-Paleogene mass extinction, revealing evolutionary survival strategies
Original framing: “Plants survived the dinosaur-killing asteroid by duplicating genomes, study suggests” — Phys.org
The study provides robust genomic evidence that polyploidy buffers plants against environmental stress by increasing genetic diversity and redundancy. Polyploid species often exhibit broader ecological tolerances, faster growth rates, and higher mutation rates, which can accelerate adaptation. However, the research focuses narrowly on angiosperms, ignoring non-flowering survivors like conifers, which relied on other mechanisms (e.g., serotiny, clonal reproduction). The 'accidental' framing risks oversimplifying the role of natural selection in preserving polyploid lineages.
The study’s revelation that genome duplication enabled plant survival during the K-Pg extinction underscores a deeper truth: resilience is not a random accident but a systemic property of life, shaped by both biological mechanisms and cultural practices.
Polyploidy, far from being a biological oddity, is a recurring strategy in Earth’s history, favored by natural selection in times of upheaval. Yet the narrative’s focus on 'accidental' duplication obscures the agency of Indigenous stewards who have long harnessed this mechanism through intentional crop selection and land stewardship. The Western scientific framing, while rigorous, risks repeating colonial patterns by divorcing plant survival from its cultural and ecological contexts. A systemic solution must therefore integrate polyploid crop systems into climate adaptation strategies, but only on terms set by their original custodians—Indigenous communities, smallholder farmers, and women seed keepers. The trickster’s lesson is clear: survival is not a solo act but a collaborative performance, where genes, land, and culture intertwine. To build resilience for the Anthropocene, we must listen to the plants, the farmers, and the tricksters who have always known the way.