In Tunisia, the cork oak is facing various difficulties namely: severe ecological conditions, very heterogeneous stands with variable density, and strong pressure on the forest. Reforestation has become an essential alternative to regenerate old cork oak forests and to support natural regeneration. Selecting adequate plant material with good genetic quality is important to ensure high adaptation to environmental hazards. In this context, the main objective is to explore and evaluate the genetic variability among different stands to select and conserve the best genetic material.
The high prices paid for genuine Mediterranean pine nuts kernels as gourmet nuts are due to an sustained demand on the world market, not met by the production harvested from the wild. The use of grafted Mediterranean stone pine trees allows landowners to establish profitable new plantations with precocious cone yields. For this purpose, genotypes have been selected in Spain and Portugal. Here we present 15 clones registered in Spain with estimated gains of around +10-30% in mean cone yield.