Somatic evolution of stem cell mutations in long-lived plants

Abstract Long-lived perennial plants accumulate numerous somatic mutations with age. Mutations originating in stem cells at the shoot apex often become fixed in large sectors of the plant body due to cell lineage drift during repeated branching. Understanding the somatic evolution of such mutations requires knowledge of the effective stem cell population size, the cellular bottleneck strength during branch initiation, and the mutation rate. Here we show that these parameters can be estimated directly from cell-layer-enriched DNA sequencing data, thus filling a gap where no other in vivo method exists. Competing Interest Statement The authors have declared no competing interest. Footnotes - Implementation of an improved parameter inference framework - Inclusion of a simulation study Copyright The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-ND 4.0 International license.