The study looked at how different trees of the Neolamarckia cadamba species grow over time and how their genetics influence their growth. They found that genetic differences within families were more important than differences between different groups of trees. The growth traits of these trees are moderately controlled by genetics. By selecting the best trees at age 5, before they reach a certain size, the researchers were able to increase the growth efficiency by over 100%. This means that choosing the right trees early on can lead to better growth in the long run. These findings can help improve breeding programs for this tree species and other fast-growing trees.