Analysis of the growth in wild genotypes of Carica papaya L. grown ex situ and cv. ´ Maradol Roja ´

Abstract

Carica papaya L. specie is native from the American tropic and one the most important fruit trees grown at tropical and subtropical regions of the world. In Cuba, many problems affect production of this fruit tree where the most important is reduction of number of exploded commercial varieties and low genetic diversity in germoplasma's bench. However, wild genotypes constitute an important source of genes for improvement programs and local explotation, which have not been characterized. Studies of growth analysis permit understanding his behavior in different planting periods and ex situ conditions and to identify initial growth characters which provoke more yield increase and favor improvement research works of the most productive genotypes. Due to before indicated, the aim of the present investigation was realized studies of the growth of the genotype wild papaya of the basin Almendares-Vento. The seeds for the experiments were obtained of fruits collected in situ. The direct measures in the plant were an area to foliate and dry weight. For the determination of the surface to foliate used a digital chamber and software. The analysis computarizado of the images of leaves obtained with the digital chamber allowed to estimate the area to foliate of simple, rapid and economic form. The major production of area to foliate of the wild genotype and similar behavior in the dry mass and rest of the evaluated indicators, indicates the availability of resources during the whole phase of growth, which associates with his performance.