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Flowering Synchronization Using Artificial Light Control for Crossbreeding Hemp (Cannabis sativa L.) with Varied
1Albert Kázmér Faculty, Széchenyi István University, 9200 Mosonmagyaróvár, Hungary.
Plants (Basel, Switzerland)
|February 26, 2025
Summary
Researchers developed a yellow-stemmed industrial hemp variety using speed breeding techniques. This method rapidly stabilized the desired trait, ensuring low tetrahydrocannabinol (THC) and high cannabidiol (CBD) levels for improved cultivation.
Area of Science:
- Agricultural Science
- Plant Breeding
- Genetics
Background:
- Industrial hemp (Cannabis sativa L.) offers diverse applications but requires genetic improvement for optimal production.
- Speed breeding accelerates crop development by optimizing environmental conditions for reduced generation times.
- Developing novel hemp germplasm with desirable traits like unique stem color is crucial for agricultural advancement.
Purpose of the Study:
- To develop a proprietary yellow-stemmed hemp germplasm using speed breeding.
- To investigate the inheritance pattern and stabilization of the yellow-stem trait.
- To assess cannabinoid profiles and agronomic potential for fiber and CBD production.
Main Methods:
- Crossbreeding between late (Eletta Campana) and early (Chamaeleon) hemp varieties.
- Six cycles of controlled flowering, manual pollination, and backcrossing in greenhouse and field settings.
- Remote sensing (VARI) for stem color assessment and cannabinoid analysis (THC, CBD).
Main Results:
- The yellow-stem trait was confirmed as recessive and monogenic, stabilizing within five cycles (12 months).
- High correlation observed between visual stem color and remote sensing VARI.
- Reduced tetrahydrocannabinol (THC) content achieved while maintaining optimal cannabidiol (CBD) levels.
Conclusions:
- Speed breeding effectively accelerates trait stabilization in industrial hemp.
- The developed yellow-stemmed germplasm shows potential for fiber and CBD production within regulatory THC limits.
- Optimized growing degree days (GDDs) ensure consistent phenological traits and crop maturity.
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