Selection of 2 Origins of Terminalia Ivorensis A. Chev. By Means of Typological and Discriminant Clusterings

The wood density is a key criterion for the Origins selecting and thus their valuing. In past, to select Origins, criteria of the plant growth, such as the circumference at 1.3 m from the ground, were used. Thus, to select the best Origins of Terminalia ivorenssis the circumference at 1.3 m from the ground, the Pilodyn penetration depth and the basic wood density were measured. Sixteen Origins from Cote d’Ivoire, Ghana and Cameroon were used in comparative Origins trial. Hierarchical Cluster, Principal Component and Factorial Discriminant Analyses were used. Three morphologically distinct clusters were evidenced. The cluster C2 composed of Origins 2 and 9 expressed the smallest values of the Pilodyn penetration depth. It was selected.  Two discriminant functions, named Z1 = -38.111 + 0.761*Pilo + 0.162*Circ1.3 and Z2 = -3.664 + 0.546*Pilo – 0.105*Circ1.3 significantly and completely discriminated the 3 clusters evidenced. They will allow the predicting of the membership cluster of a new individual from its values of the circumference at 1.3 m from the ground and the Pilodyn penetration depth.