polyploid-editing
Polyploid editing refers to the application of gene-editing technologies, such as CRISPR-Cas9, to plants that carry more than two complete sets of chromosomes — a condition called polyploidy that is widespread among cultivated crops. Editing polyploid genomes is particularly challenging because multiple gene copies (homologs) must often be targeted simultaneously to achieve a measurable phenotypic effect. Advances in this area are critical for improving yield, disease resistance, and stress tolerance in many of the world's most important food crops, which are predominantly polyploid.
open_in_new WikipediaPubMed · 2026-05-06
Scientists successfully used CRISPR gene editing in banana plants with near-perfect efficiency — 91% of edited plants showed a complete, uniform genetic change rather than the patchwork results that typically plague editing in crops with multiple gene copies. This solves a long-standing obstacle in improving bananas and other complex polyploid crops.
91% of 102 edited banana plants showed full albino phenotype, with 9% pale green — zero chimeric (mixed/partial) plants, indicating near-complete editing efficiency.
Tri-allelic editing was confirmed across all plants: all three gene copies were disrupted, with two carrying identical mutations and one a distinct mutation.
Tiny deletions of just 2–6 amino acids within the conserved binding motif were enough to fully abolish the gene's function, confirming the motif's essential role.
