Variation of weigh and viability of seeds of Pinus tropicalis from different populations

Abstract

Pinus tropicalis Morelet is endemic in the province of Pinar del Rio and Isla de la Juventud. In this paper the variation is evaluated in weight and viability of seeds from 4 seed areas of the province of Pinar del Rio, Cuba, which were harvested in July and stored for five months at room temperature until They were made to the corresponding analysis. Samples of each of the sources weretaken to determine the weight of 1000 seeds, as established methodology ISTA (1993). Viability was also determined from the tetrazolium Test. It was observed that the individual weight of the seeds of Pinus tropicalis has 0,0051g values to 0,050g, while the average weight of 1000 seeds shows variation by origin, showing the greatest weight to the seeds from the seed mass Ceja del Negro (orchard seedling) genetically enhanced trees, which directly influences the quality of seeds. The viability was also superior in the origin of Ceja del Negro.