Cloning of erect, thornless, non-browsed nitrogen fixing trees of Haiti's principal fuelwood species (Prosopis juliflora).
A progeny trial in Haiti planted in August 1987 compared 70 open-pollinated families of Prosopis (Prosopis spp., P. alba, P. juliflora, P. velutina, P. glandulosa, P. flexuosa, P. nigra, P. tamarugo) representing seed sources from Haiti, Peru, Chile, Argentina and southwestern USA. At the end of 4 years of growth, the tallest 6 families were of Peruvian origin. Some of these Peruvian trees, (probably P. juliflora) were thornless, had erect habit and were not browsed by goats (which had penetrated the electrical fence surrounding the trial plots), unlike other thornless P. alba families from South America. Scions from the 5 tallest spineless and most erect trees were transported from Haiti to Texas A&I University where they were successfully grafted onto P. alba rootstock. These scions should have great potential for grafting onto existing weedy Prosopis and for grafting onto rootstock previously shown to tolerate salinities of seawater level and pH values of 10.3.