Chinese scientists develop gene-editing technique for corn yield allowing for more compact and high yield crops.
Chinese scientists have introduced a gene-editing technique to reduce the height of corn plants, paving the way for compact, high-density varieties that are more resistant to lodging, according to a study published in the Plant Biotechnology Journal.
As the most widely produced cereal crop, corn plays a vital role in global food security. Increasing planting density is a proven method to enhance yields, but progress in breeding shorter, stronger plants has been hindered by a limited genetic pool.
The research, led by the Biotechnology Research Institute of the Chinese Academy of Agricultural Sciences (CAAS) in collaboration with Anhui Agricultural University and South China Agricultural University, focused on modifying the Br2 gene through targeted gene editing. Scientists created a knockout vector for the Br2 gene and identified seven transgenic lines with unique mutations in corn inbred varieties.
Hybridization trials revealed that all 28 hybrid offspring produced from crosses with elite inbred lines resulted in dwarf progeny. To speed up breeding, the researchers developed a haploid inducer-mediated genome editing system, which allowed edited haploid plants to be converted into stable double-haploid lines within just two generations. When applied to three elite inbred lines, this system significantly reduced plant height.
“This technique enables precise and rapid control of plant height across different genetic backgrounds,” said Wang Baobao, the study’s corresponding author and a researcher at CAAS. “It provides essential technical support for breeding corn varieties that are suited for high-density planting and improved lodging resistance,” he further added.
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