The researchers studied different cowpea varieties to understand how certain traits are inherited. They found that some traits showed a wide range of variation in both parents and offspring, while others had less variation. The heritability of these traits was relatively low, suggesting they may not be easily passed down to future generations. To improve cowpea productivity, the researchers recommend focusing on traits with high variability and using hybridization to create new varieties. It is also important to plant cowpea at specific times to study their genetics effectively.