Rare but diverse off-target and somatic mutations found in field and greenhouse grown trees expressing CRISPR/Cas9.

CRISPR gene editing, while highly efficient in creating desired mutations, also has the potential to cause off-target mutations. This risk is especially high in clonally propagated plants, where editing reagents may remain in the genome for long periods of time or in perpetuity. We studied a diverse population of and trees that had CRISPR/Cas9-containing transgenes that targeted one or two types of floral development genes, homologs of and .