The researchers studied how different types of wheat plants grow in different environments without irrigation. They tested nine wheat varieties in eight different places over several years. They found that some wheat varieties did better in certain environments, while others did well in all conditions. The wheat variety called Bereket had the highest grain yield, followed by Selimiye and Gelibolu. Overall, the environment had the biggest impact on how well the wheat plants grew, followed by the type of wheat plant and how they interacted with the environment.