SciELO - Scientific Electronic Library Online

 
vol.34 issue1Molecular characterization of melon accesses collected in the Brazilian northeastSusceptibility of passionfruit genotypes to septoriosis under greenhouse condition author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Revista Brasileira de Fruticultura

Print version ISSN 0100-2945

Abstract

RIBEIRO, Francisca Samara de Carvalho; SOUZA, Valdomiro Aurélio Barbosa de  and  LOPES, Ângela Celis de Almeida. Genetic diversity in castanheira-do-gurguéia (Dipteryx lacunifera Ducke) based on fruit physical, chemical and nutritional characteristics. Rev. Bras. Frutic. [online]. 2012, vol.34, n.1, pp. 190-199. ISSN 0100-2945.  http://dx.doi.org/10.1590/S0100-29452012000100026.

This study aimed to evaluate the genetic divergence among 23 "castanheira-do-gurguéia" genotypes based on fruit physical, chemical and nutritional characteristics. Fruits were collected from natural occurrence areas of the Piauí southwestern savannah. The physical characteristics analyzed were: (a) fruit - average mass (MMF), length (CF), width (LF), thickness (EF) and pericarp average mass (MMP); and (b) nut - average mass (MMC); length (CC), width (LC) and thickness (EC). The nut chemical and nutritional characteristics analyzed were: fat, crude protein, crude fiber, ash and total carbohydrates, all expressed in percentage; crude energy, expressed in kcal 100 g-1, and the minerals (P, K, Ca, Mg, Mn, Fe, Cu and Zn), expressed in mg 100 g-1. The genetic divergence was evaluated using Mahalanobis distance as dissimilarity measure and evaluated the relative importance of the characteristics in the genetic divergence. Tocher and UPGMA grouping methods were used. A high variability for these characteristics was observed among genotypes. The genotypes G-17 and G-18 are the most divergent and the genotypes G-3 and G-16 are the most similar. The characteristics that had the greater contributions to the genetic divergence among genotypes were MMP, MMF, E, FB, CT and PB. The "castanha-do-gurguéia" is richer in P, K, Mg, PB, FB, CT and E.

Keywords : Nut; multivariate analysis; savannah of the state of Piauí.

        · abstract in Portuguese     · text in Portuguese     · pdf in Portuguese