Understanding the control of perpetual flowering and continuous runnering in strawberry
Crispr
If you grow strawberries and have ever wished your ever-bearing variety would also send out enough runners to fill a new bed, this research is working toward exactly that — plants that fruit all summer and still propagate themselves freely.
Some strawberry varieties produce fruit continuously through the season, but they rarely send out the long stems (runners) that let you grow new plants. Researchers used a precise gene-editing tool to study which genes cause this trade-off, and found two specific spots in the strawberry genome that seem to control how freely a plant sends out runners. By understanding these switches, breeders could eventually develop strawberries that fruit abundantly all season and still produce plenty of offspring for gardeners to replant.
Key Findings
Knocking out the FaTFL1 gene caused strawberry plants to flower earlier and produce fewer runners under long-day conditions, confirming it acts as a brake on flowering and linking it directly to runner production.
Two additive QTLs (genomic regions) associated with continuous runnering were identified in woodland strawberry, with candidate genes tied to dormancy and bud outgrowth showing significant downregulation in high-runnering plants.
Mutating the FaFT1 gene altered flower and fruit shape, suggesting this gene plays a role in floral development beyond simply triggering flowering.
chevron_right Technical Summary
Scientists used gene editing to uncover why strawberry plants that fruit all season long tend to produce fewer runners for propagation. The research identified key genes and chromosomal regions controlling this trade-off, opening a path toward breeding strawberries that do both well.
Abstract Preview
Consumer demand for year-round strawberry fruit has increased the need to extend the cropping season. Perpetual flowering cultivars, which produce fruit continuously throughout the growing season, ...
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