The researchers studied different types of mung beans to see how certain traits affect seed yield. They grew the beans in a field and measured things like plant height, pod length, and number of seeds per pod. They found that traits like days to maturity and pod length have a big impact on seed yield, while traits like days to flowering and plant height have a negative effect. This means that when choosing which beans to grow, it's important to focus on traits like days to maturity and pod length to get the best seed yield.