Application of AMMI and GGE biplot to analyse the stability and G X E interaction of buckwheat genotypes in Prayagraj

In the global effort to secure food supplies for a growing population, scientists are increasingly looking beyond traditional staples like wheat and rice toward resilient, nutrient-dense crops that can thrive in difficult conditions. One such crop is buckwheat, a hardy plant known for its ability to grow in poor soils and withstand drought, offering a gluten-free source of protein and essential minerals. However, a major hurdle in making buckwheat a reliable food source is that its performance varies wildly depending on where and when it is grown. A variety that produces an abundant harvest in one field might fail completely in another, a phenomenon known as genotype-by-environment interaction. This unpredictability makes it difficult for breeders to select the best seeds for farmers. To solve this, researchers use advanced statistical maps that can visualize how different plant varieties respond to changing weather and soil conditions, allowing them to separate those that are consistently good from those that are merely lucky in specific spots.

A team of researchers based in Prayagraj, India, recently applied these mapping techniques to fifteen different buckwheat varieties to find the most reliable performers. The study took place over three consecutive winter growing seasons, testing the plants in environments that represented the local agricultural conditions. The researchers measured the seed yield from each plant, gathering a massive amount of data to see how the fifteen varieties reacted to the subtle differences between the years. By using two powerful analytical tools, they were able to sort through the noise of nature and identify which plants were truly superior. The first tool helped them see which varieties were the most stable, meaning they produced a steady amount of seed regardless of the year, while the second tool helped them pinpoint which specific variety was the absolute best for a particular type of environment.

The analysis revealed a clear split between plants that were high-yielding but unpredictable and those that were steady but produced less. Three varieties stood out as the top producers of seeds overall, but they were also the most sensitive to changes in their surroundings. If the weather shifted slightly, their harvest could swing dramatically. In contrast, a different group of varieties, including numbers eight, nine, ten, and seven, showed remarkable consistency. These plants did not produce the highest possible harvest in any single year, but they delivered a reliable, moderate amount of seed every time, no matter the conditions. This stability is a crucial trait for farmers who need to know they will have a harvest to sell or eat, even if the season is not perfect.

The researchers also discovered that the different test sites were not all the same; they each told a different story about the plants. One specific location, representing the 2022–2023 season, proved to be the most informative. It was the best place to tell the difference between a good variety and a great one, acting as a rigorous filter that highlighted the strongest performers. When the team looked at which variety won in which specific environment, they found that the landscape was divided into three distinct zones. One variety dominated in the first year, a different one took the lead in the second, and a third variety was the clear winner in the third year. This confirmed that there is no single "perfect" plant for every situation; instead, the best choice depends entirely on the specific conditions of the farm.

Among all the candidates, one variety emerged as a particularly promising solution for broad farming needs. This specific plant, identified as G14, managed to combine high seed production with the ability to adapt to different environments. It offered a balance of productivity and resilience that is rare in plant breeding, making it a strong candidate for wide environmental adaptability. For farmers looking to maximize their harvest in favorable conditions, another variety, G15, was identified as the top choice, though it required more specific conditions to reach its full potential. Meanwhile, the stable varieties like G8 and G7, while not the highest producers, offer a safety net, ensuring that even in tough years, a crop can still be harvested.

The findings of this study provide a clear roadmap for improving buckwheat cultivation in the region. By understanding exactly how these plants interact with their environment, breeders can now make smarter decisions about which seeds to release to farmers. They can offer a high-yielding option for those with ideal conditions and a stable, reliable option for those facing more variable weather. This targeted approach moves away from guessing and toward precision, ensuring that the nutritional benefits of buckwheat can be delivered consistently to communities that need them. The work demonstrates that with the right tools, it is possible to unlock the full potential of resilient crops, turning a plant that was once considered difficult to manage into a dependable pillar of food security.