polyploid-genetics
Polyploid genetics is the study of organisms that carry more than two complete sets of chromosomes, a condition that arises through whole-genome duplication events. This phenomenon is especially prevalent and consequential in plants, where polyploidy has driven the evolution of major crop lineages and contributed to increased genetic diversity, adaptability, and trait variation. Understanding how polyploid genomes are structured, inherited, and expressed is central to improving crop breeding, yield, and stress resilience.
PubMed · 2026-05-09
Scientists are using CRISPR gene editing to improve complex crops like potato, alfalfa, sugarcane, and blueberry, which have multiple copies of every gene and have historically been very difficult to breed. This review maps recent progress and the remaining technical hurdles, pointing toward a new era of precision crop improvement.
CRISPR has been successfully applied across four major autopolyploid crops — potato, alfalfa, sugarcane, and blueberry — targeting traits from tuber quality and stress tolerance to flowering time and plant regeneration.
A key bottleneck is achieving complete disruption across all gene copies simultaneously; partial edits lead to chimeric plants where only some cells carry the change, reducing trait expression.
Emerging solutions including multiplexed guide RNA designs, morphogenic regulators, and virus-based delivery systems are improving both the efficiency and heritability of edits in these complex genomes.
