Análise do desenvolvimento entre e dentro de populações de Murici (Byrsonima cydoniifolia A. Juss) sob cultivo

Abstract

In the Cerrado there is a large number of fruit species with high productive potential, one of which is the murici (Byrsonima sp.), With numerous features, among which stand out: the production of food and wood, the use in popular medicine, between others. The experimental phase of this research was conducted in a field condition, in a Germplasm Bank set up in an area belonging to the Federal University of Mato Grosso - Campus do Araguaia, located in the municipality of Barra do Garças. The spacing used for the assembly of the bench was 4m between the lines and 3m between the plants in the line, no soil correction was carried out and a fertilization was made with about 90 grams of granulated fertilizer of the formulation 10-10-10. The populations established in this Germplasm Bank and used for the study were Ouro Fine, Toy and Patizal. The characteristics analyzed were plant height, stem diameter, crown diameter, leaf length and width, petiole length and petiole width, submitted to the t test. A growth curve was also constructed for the variables plant height and stem diameter. The stem diameter and height showed linear growth behavior among the three populations of genotypes studied during different periods of evaluation. In general, it can be said that the genotypes BR 1 and PT 31 were the ones that showed the most significant differences with the other genotypes. For canopy diameter, the genotypes: BR 1, BR 4, OF 6, OF 27, PT 13 and PT 31 were the ones that showed differences; leaf width the genotypes BR 13, BR 14, OF 24, PT 7, PT13 and PT16, thus can be considered of great interest from the point of view of conservation and genetic improvement. The parameters evaluated in the study showed morphometric variability between and within populations, enabling a pre-selection for a genetic improvement program, the characteristics that with the greatest number of occurrences of significant differences were: length and width of the petiole and the width of the leaves , the populations with the best developments in the first vegetative year for the height and diameter characteristics of the stem were Ouro Fino and Brinquedo.