In grownup planarians, the substitute of cells misplaced to physiological turnover or damage is sustained by the proliferation and differentiation c-Jun N-terminal kinases (JNKs) of stem cells called neoblasts. Neoblast lineage relationships as well as the molecular adjustments that consider area during differentiation into the ideal cell types are poorly understood. Here we report the identification and characterization of a cohort of genes particularly expressed in neoblasts and their descendants. We locate that genes with severely downregulatedVincristine mw expression following irradiation molecularly define no less than three discrete subpopulations of cells. Simultaneous BrdU labeling and in situ hybridization experiments in intact and regenerating animals indicate that these cell subpopulations are linked by lineage. Our information demonstrate not just the capability to measure and research the in vivo population dynamics of adult stem cells for the duration of tissue homeostasis and regeneration, but additionally the utility of studies in planarians to broadly inform stem cell biology in grownup organisms.