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Speed breeding technique uses light for 22h/day and accelerates up to 6 generations of plants per year, revolutionizing global agricultural development.
In 2018, researchers from the University of Queensland, in collaboration with the John Innes Centre and other institutions, published in the scientific journal Nature Plants, on January 1, 2018, a study that presented speed breeding, a method capable of significantly accelerating the development cycle of agricultural crops. The technique uses controlled environments, supplemental lighting, and extended photoperiods, reaching up to 22 hours of light per day, to reduce the time between generations of plants such as wheat, barley, chickpeas, peas, and canola.
The strongest data from the study is the possibility of producing up to six generations per year of wheat, barley, chickpeas, and peas, as well as four annual generations of canola, compared to one generation in the field or two to three generations under conventional greenhouse conditions. In a statement published by the University of Queensland on January 2, 2018, researcher Dr. Lee Hickey highlighted that the technology was inspired by NASA experiments for growing wheat in space and has been applied on Earth to accelerate breeding programs.
The advancement does not eliminate steps in agricultural breeding, but directly accelerates the biological cycle of plants, which is the main bottleneck of the process.
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Speed breeding was developed in Australia and validated in a scientific publication in Nature Plants with reproducible results in different crops
The concept of speed breeding did not emerge as an isolated idea, but as a result of structured research aimed at increasing the efficiency of genetic improvement. The article published in Nature Plants details experiments conducted in controlled environments, where plants were grown under continuous lighting with adjusted spectrum LEDs and ideal thermal conditions to accelerate growth.
The results showed that crops such as wheat, barley, and peas consistently responded to the method, significantly shortening the time between germination, flowering, and seed production.
The reproducibility of the method is one of the strongest points of the study, as different laboratories and research centers were able to reproduce the results with controlled variations.
Furthermore, later works published in journals such as Theoretical and Applied Genetics and indexed databases like PMC/NIH reinforce the robustness of the technique and its applicability in different agricultural contexts.
The difference between traditional cultivation and speed breeding shows why the method can accelerate the development of new varieties multiple times
In conventional breeding, the process of creating a new agricultural variety involves successive crossings and selection of desirable traits over several generations. Each cycle depends on the natural growth of the plant, which limits the number of possible generations per year.
In crops like wheat, this typically results in one annual generation in the field, which means that complete development programs take between 8 and 15 years, also considering validation stages and agronomic tests.
With speed breeding, this cycle is compressed. By providing almost continuous light and ideal conditions, the plant accelerates its physiological development, allowing multiple generations within a single year.
In practice, the proven gain is between four and six times faster than the traditional method, and it can be greater when combined with other technologies. This difference completely changes the dynamics of agricultural research, especially in scenarios that require rapid responses to challenges such as emerging pests or extreme weather events.
Use of controlled spectrum LEDs and a climate-controlled environment allows manipulation of photoperiod and acceleration of plant growth
The operation of speed breeding depends on two main factors: light and temperature. Artificial lighting, usually based on LEDs, is adjusted to provide the ideal spectrum for photosynthesis and plant development.
By maintaining up to 22 hours of light per day, researchers can extend the active period of the plant, reducing the time needed to complete its reproductive cycle.
At the same time, the environment is maintained at a controlled temperature, avoiding thermal stress and ensuring ideal growth conditions.
This combination creates a highly optimized artificial environment where development occurs at the maximum biologically possible rate.
The use of LEDs is also strategic as it allows precise control of the light spectrum, as well as greater energy efficiency compared to traditional lighting systems.
Application of speed breeding in crops like wheat, rice, and soybean shows potential for different agricultural systems
Although the initial study focused mainly on wheat and barley, the concept of speed breeding has been adapted for other crops, including rice and soybean.
In experimental conditions, adapted protocols allow for a reduction in flowering time and an increase in the number of annual generations. However, it is important to highlight that results vary according to species, cultivar, and specific experimental conditions.
In the case of rice, for example, shorter cycles can be achieved under controlled environmental conditions, while in soybean the response heavily depends on the variety used. This means that the method is not universally standardized, but rather adaptable, which broadens its reach but requires technical adjustments for each crop.
Integration with genetic editing like CRISPR can multiply the impact of speed breeding on agricultural development
One of the most strategic aspects of speed breeding is its compatibility with modern genetic editing technologies, such as the CRISPR system.
While speed breeding accelerates the biological cycle, CRISPR allows for the precise introduction of specific genetic modifications. The combination of the two approaches creates a scenario where new varieties can be developed in a significantly shorter time than historically observed.
This integration is seen as one of the key tools to tackle agricultural challenges of the 21st century, including climate change, water scarcity, and increasing food demand.
However, it is important to highlight that the use of genetic editing involves regulatory and ethical issues that vary from country to country, which can influence the speed of adoption of these technologies.
Impact of speed breeding on global food security and the challenge of feeding 10 billion people by 2050
International organizations like the FAO project that the global population may approach 10 billion people by 2050, which requires a significant increase in food production.
In this context, speed breeding emerges as a strategic tool to accelerate the development of more productive and resilient crops.
Varieties capable of resisting drought, extreme heat, and pests can be developed in less time, allowing for a quicker response to environmental changes and agricultural crises.
The method does not directly increase production but accelerates the genetic innovation that makes this production possible. This point is fundamental to understanding the real impact of the technology within the global agricultural system.
Limitations of speed breeding show that the technique accelerates biological cycles, but does not replace field tests and agricultural validation
Despite advancements, speed breeding does not eliminate all stages of agricultural development. Field tests, validation under different climatic conditions, and regulatory approval remain necessary.
This means that while the genetic cycle is accelerated, the total time to launch a new variety still depends on multiple factors.
The technique reduces one of the biggest bottlenecks in the process, but does not replace the need for complete agronomic validation.
Additionally, large-scale implementation requires specific infrastructure, including controlled chambers and lighting systems, which may limit access in resource-poor regions.
Difference between estimates and proven data reinforces the need for precision when interpreting speed gains
The agenda mentions acceleration of up to 10 times, which can occur in specific scenarios, but the most consistent data points to gains of 4 to 6 times the number of generations per year.
This distinction is important for maintaining scientific accuracy. Higher values may appear when the method is combined with other technologies, but do not represent a universal standard.
The proven gain is already significant enough to justify global interest in the technique, without the need for exaggeration. The development of speed breeding indicates that agriculture is entering a phase where the scientific response time can be drastically reduced.
Instead of relying on long and unpredictable cycles, researchers can work in controlled environments, accelerating experiments and increasing the rate of innovation.
This can directly influence agricultural policies, research investments, and food security strategies. The ability to develop new varieties in less time may become a strategic differentiator among countries.
Do you believe that techniques like speed breeding will be sufficient to face the global challenge of food production in the coming decades?
The advancement of speed breeding raises a central question for the future of agriculture: will accelerating genetic development be enough to meet the growing global demand?
Plants that previously took more than a decade to develop can now go through multiple generations in a single year, the speed of agricultural innovation can completely change the global landscape.
Still, factors such as distribution, access, sustainability, and public policies remain decisive. Technology is advancing rapidly, but the challenge of feeding billions of people involves much more than just accelerating plant growth.
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