A simple way would be to obtain two matrices, one for the genetic distances and another for the morphological distances, and then you do a correlation between the two matrices (Mantel test). If you have only one morphological variable, just go ahead and calculate the distance matrix with those values. If you have multiple traits, then you would need to do a PCA of your morphological variables, and then obtain your morphological distance matrix from the PC1 scores.

I hope it helps!

Thank you Sir, C. Miguel Pinto .

Thank you sir.C. Miguel Pinto