Scientists publish a complete CRISPR recipe for editing corn DNA
Char SN, Liu H, Birchler JA, Wang K, Yang B
Crispr
Corn breeders now have a streamlined playbook for snipping out traits like susceptibility to drought or disease, compressing what once took decades of crossbreeding into a handful of growing seasons.
CRISPR is a molecular tool that lets scientists cut a plant's DNA at a precise location, like using scissors guided by a GPS coordinate. This paper lays out a complete recipe for doing that in corn, from drawing up the molecular scissors to checking whether the cut actually happened. Researchers can use it to knock out genes linked to disease, drought sensitivity, or lower yields, speeding up the development of tougher, more productive corn varieties.
Key Findings
The protocol supports multiplexed editing of up to 8 genes simultaneously in a single maize plant using stacked single-guide RNAs.
Four genotyping methods are described, ranging from rapid low-cost screening (T7EI assay, restriction digestion) to high-resolution confirmation (Sanger and high-throughput sequencing).
Gateway cloning is used for modular vector assembly, enabling flexible combination of guide RNAs with the Cas9 expression cassette.
chevron_right Technical Summary
Scientists have published a detailed, step-by-step toolkit for using CRISPR gene-editing in maize, covering everything from designing the molecular guides to confirming that edits worked. The protocol supports editing one gene or up to eight simultaneously, with four different methods for verifying results.
Abstract Preview
Original paper
CRISPR-Cas9 Toolkit for Maize: Vector Design, Construction, and Analysis of Edited Plants.
Genetic toolsets are essential for gene discovery, elucidating biological pathways, and accelerating molecular breeding of superior crops in plant biology and agriculture. Among these, the CRISPR-C...
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Maize, also known as corn in North American English, is a tall stout grass that produces cereal grain. The leafy stalk of the plant gives rise to male inflorescences or tassels which produce pollen, and female inflorescences called ears. The ears yield grain, known as kernels or seeds. In modern ...