Phenotypic and agronomic characteristics of six genotypes of papaya (Carica papaya L.) from Tuxpan, Guerrero, Mexico

In Mexico the papaya production (Carica papaya L.) is affected by genetic, environmental and biotic factors; highlight the damages caused by the ring spot virus, which reduces the quantity and quality of the fruit considerably; thus it is very important to know the productivity of the genotypes in a certain atmosphere. The present investigation was carried out with the objective of to evaluate the development and the agronomic characteristics of six papaya genotypes. The study was carried out in the town of Tuxpan, Guerrero, where the genotypes: R4M3, Maradol, Criolla, Red Lady, Zapote, and R5M2 were cultivated. A complete randomized block experimental design was used, with four repetitions. The evaluated variables were: height to the first fruit, diameter of the neck, height of the plant, number of days to the crop, yield of fruits (t/ha), number, diameter and longitude of the fruits, concentration of sugars (degrees Brix), texture, color of the pulp and epicarp of mature fruits. Variables data were subjected to analysis of variance, and means were compared by Tukey's test. In relation to the adaptation of the genotypes: all the genotypes developed and produced fruits under dry tropical conditions. The variety Maradol was the outstanding, presenting minor vigor, greater precocity and productivity, hard-pulp texture, higher sugars concentration, good size and colour.