A two year trial was made using as seed sources: 3 P. atlantica (1 from Syria and 2 from USA), 1 P. palaestina (Syria), 1 P. terebinthus (Spain), 2 P. vera cultivars ('Larnaka' and 'Mateur') and 7 interspecific hybrids: 3 introduced as P. integerrima (USA), 3 introduced as P. palaestina (1 from USA and 2 from Greece) and 1 introduced as P. atlantica (USA). Records were taken on: trunk diameter and height, number of feathers, weight of the whole seedling, weight of the root system and number of roots. Important and significant differences were obtained for all the parameters studied. P. integerrima hybrids (USA), P. atlantica (Syria) and P. palaestina hybrids (Greece) showed interesting characteristics. For the commercial production in nursery, it is important to select fast-growing rootstocks to allow early budding and transplantation, with a branched root system which allows them to withstand the transplantation crisis.