Physical characteristics and chemical-nutritional composition of the castanheira-do-gurguéia fruit (Dipteryx lacunifera Ducke)

Abstract

The castanheira-do-gurguéia is a native fruit tree with great regional importance, whose almond present pleasant flavorand exploration still limited. The objective of this research was to evaluate the physical and chemical-nutritional characteristics of 23 castanheira-do-gurguéia genotypes from natural occurrence areas of Piauí State southwestern savannah. A sample of 30 to 50fruits per genotype was collected. The physical characteristics analyzed were: fruit mass, pericarp mass, fruit length, larger fruitthickness, fruit length/larger fruit thickness ratio, smaller fruit thickness, fruit length/smaller fruit thickness ratio, larger pericarpthickness, smaller pericarp thickness, longitudinal diameter of the pericarp cavity, vertical diameter of the pericarp cavity, almondmass, almond length, larger almond thickness, smaller almond thickness and almond length/larger almond thickness ratio. Thefollowing chemical-nutritional characteristics of almonds were analyzed: fat, crude protein, crude fiber, ash total carbohydrates,crude energy and minerals (P, K, Ca, Mg, Mn, Fe, Cu and Zn). The data were submitted to analysis of variance and genotypes meanswere compared by Scott-Knott's test at 5%. There were differences among genotypes for all physical and chemical-nutritionalcharacteristics evaluated, except Ca in the almonds. It was verified the presence of great phenotypic variability in the analyzedgermplasm. The genotype G-3 is the most promising in terms of almond mass, almond length and larger almond thickness, and thegenotypes G-7, G-10, G-13 and G-23 are the most promising in the chemical-nutritional composition.