1) Forest management 
A cultigen (from the Latin cultus - cultivated, and gens - kind) is a plant that has been deliberately altered or selected by humans; it is the result of artificial selection. These `man-made` or anthropogenic plants are, for the most part, plants of commerce that are used in horticulture, agriculture and forestry. Because cultigens are defined .....
a plant whose origin or selection is primarily due to intentional human activity.
(from the article `agriculture, origins of`) ...Fabaceae and Leguminosae), and nightshade or potato (Solanaceae) families have produced a disproportionately large number of cultigens because ...
<botany> A cultivated plant or or animal that has no known wild ancestor. ... (09 Oct 1997) ... 
cultigen [culti (vated) + -gen.] 1. A cultivated plant of unknown or obscure taxonomic origin. 2. An organism, especially a cultivated plant; such as, a banana, not known to have a wild or uncultivated counterpart.
a cultivated plant of unknown or obscure taxonomic origin.