Variability of Agronomic Characters Related to Resistance to Stem Canker (Phytophthora Palmivora) on Duku (Lansium Domesticum) Along Batanghari River, Sumatra, Indonesia

The study aimed to identify duku (Lansium domesticum) mother trees and their progenies resistant to stem canker disease caused by Phytophthora palmivora in Jambi Province, Indonesia. Researchers conducted morphological identification of healthy mother trees across four locations and analyzed resistant seedling progeny. They found 19 healthy mother trees with a similarity index of 0.40 based on 11 agronomic characters. Cluster analysis identified two clusters of mother trees, independent of growth locations. Only 5 seedlings exhibited resistance, and these were linked to mother trees with longer leaves, more fruits per branch, higher yields, and larger canopies. These findings could guide the selection of resistant mother trees to sustain duku populations along the Batanghari River.