VARIABILIDADE GENÉTICA DE ACESSOS DE MELANCIA COLETADOS EM TRÊS REGIÕES DO ESTADO DA BAHIA

Abstract

The germplasm bank of cucurbitaceae, sited at Semi-Arid Embrapa in Petrolina-PE comprises different species of cucurbitaceae family, out of which 600 accessions of Citrullus spp. Forty two accessions from the germplasm bank plus the Crimson Sweet cultivar were submitted to morphological evaluation in order to study the genetic variability of accessions collected in three different regions from the State of Bahia (Chapada Diamantina; Irecê e Vitória da Conquista). The field trial was set in a randomized block design with three replications. Thirteen phenotypic descriptors to evaluate plant and fruit characteristics were used. The data were submitted to a variance analysis and the means were compared using Scott-Knott at 5% probability. The analysis of variance among accessions from different regions showed significant differences for eleven characters except number of stems per plant and rind thickness in the peduncle region. The accessions formed two different groups for most of the descriptions, but, fruit mean weight and sugar content presented four and three groups, respectively showing higher genetic variability, the variation among accessions within each region was significant. Irecê and Vitória da Conquista presented the higher and the smaller variation among the accessions, respectively. Therefore, the genetic variability of watermelon accessions in the tree regions of the State of Bahia and some accessions presented useful characters to be incorporated in watermelon breeding programs.