The phytochrome interacting factor 3 (PIF3) mediates low accumulated temperature (LAT) response in Brassica napus.
Ma C, Zeng Y, Xie Y, Lu Z, Liu Z
Crop Improvement
Rapeseed fields planted after the rice harvest in southern China — and eventually in colder northern regions — could stay productive through winter rather than struggling in the cold, which means more cooking oil from the same farmland without clearing new ground.
Rapeseed (the plant that gives us canola oil) struggles when farmers plant it late in the year because shorter days and less warmth slow its growth before winter sets in. Researchers found a single gene — think of it as a master switch — that controls how well the plant handles these tough conditions by adjusting how it captures sunlight. By tweaking this gene using a precision editing tool, they confirmed it really does make the difference between a plant that thrives and one that stalls out in the cold.
Key Findings
Among 482 rapeseed varieties tested under normal vs. late-sowing conditions, accumulated temperature (warmth over time) strongly predicted which plants grew well — four pairs of sensitive vs. tolerant lines were identified.
Combining RNA analysis and genome-wide association scanning across 135 rapeseed varieties pinpointed BnaPIF3 as a shared regulatory gene in late-sowing stress response.
CRISPR-Cas9 knockout plants with a disabled BnaPIF3 gene showed measurable changes in photosynthetic adjustment and growth under low accumulated temperature, confirming the gene's role.
chevron_right Technical Summary
Scientists identified a gene in rapeseed (canola) called BnaPIF3 that controls how the plant copes with cold, low-sunlight winters — knowledge that could help breed varieties that thrive when planted late in the season after rice harvests.
Abstract Preview
Late-sowing of rapeseed is an effective strategy to fill the post-harvest window after late-season rice and align with the winter growing period. However, this cultivation practice is severely limi...
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Rapeseed, also known as rape and oilseed rape and canola, is a yellow-flowered member of the Brassicaceae family.