The researchers studied 30 different types of finger millet to see how different traits affect grain yield. They found that traits like number of tillers and grain yield had high variability, while traits like plant height and ear length had moderate variability. Most traits showed high heritability and genetic advance, meaning they can be improved through direct selection. The number of fingers per ear and number of tillers had the biggest impact on grain yield. Overall, the study suggests that certain traits in finger millet can be improved through selective breeding.