Overcoming breeding barriers with genome editing in autopolyploid crops.
Enciso-Rodríguez F, Barrero LS, Garzón-Martínez GA, Kim JH, Kumam Y
Crispr
The potato in your garden likely carries four copies of every gene — meaning breeders have to knock out all four to change a single trait, a puzzle that CRISPR is finally starting to solve, which could mean disease-resistant, lower-input spuds without decades of cross-breeding.
Some of our most important food plants — like potatoes and blueberries — have unusually complicated genetics because they carry multiple copies of all their DNA. This makes it really hard to breed better versions, because changing one copy doesn't always change how the plant actually grows. Researchers are now using a precise molecular tool called CRISPR to edit all the copies at once, and this review tracks how far that technique has come and what challenges still remain.
Key Findings
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.
chevron_right Technical Summary
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.
Abstract Preview
Autopolyploid crops play a central role in global agriculture, yet their complex genomes pose significant barriers to genetic improvement. High allelic diversity, extensive redundancy, and polysomi...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Was this useful?
Chloroplast Genome Editing Eliminates Gluten Immunogenicity in Triticum aestivum
It could mean that people with celiac disease — roughly 1 in 100 worldwide — may one day safely eat bread made from real wheat, without sacrificing the taste...
The potato is a starchy tuberous vegetable native to the Americas that is consumed as a staple food in many parts of the world. Potatoes are underground stem tubers of the plant Solanum tuberosum, a perennial in the nightshade family Solanaceae.