2015 BIOSCIENCE JOURNAL 2015 31(卷), 3(期), (682-690页)
The demand for umbu fruits in Northeast Brazil is very large, however, commercial production is non-existent and all fruits are obtained throughextractivism. Thus, strategies toward identifying and selecting superior genotypes in order to establish a breeding program for this culture are necessary. Collection, characterization and germplasm evaluation are essential steps in order for this process to succeed. The objective of this work was to evaluate physical characteristics of umbu fruits from 58 accessions collected at Paraiba and Rio Grande do Norte states. The following traits were analyzed: fruit length, fruit width, fruit weight, skin percentage, seed percentage and pulp yield. The components of variance and the phenotypic variation among all locals (P-Mun), among accessions within locals (P-Acessos/Mun) and among fruits within accessions (P-Frutos/Acessos) were estimated. The coefficients of phenotypic correlations were also calculated. Significant phenotypic differences for all evaluated traits were detected at Juazeirinho, Campina Grande, Serra Branca, Boqueirao and Caturite. This behavior was not found in the others cities. The correlation analysis showed interesting relations among some fruit traits that will facilitate the genetic breeding of umbuzeiro.