The researchers studied different types of brinjal plants to see which ones produced the most fruit. They found that some plants had better fruit yield than others, with NDB-301 and NDB-325 being the most promising for total fruit yield. They also discovered that certain traits like fruit circumference and unmarketable fruit yield were highly variable, meaning they varied a lot among the plants. These traits also had a high chance of being passed down to future generations. This means that by selecting plants with these traits, farmers can improve their crop yield in the long run.