Diversidad genética de accesiones de la familia Caricaceae en el sur de Ecuador

Abstract

The genetic diversity of 78 accessions of the Caricaceae family collected in the provinces of Azuay, Cañar, Loja, El Oro and Zamora Chinchipe, south of Ecuador, was studied, including the species Vasconcellea candicans, V. goudotiana, V. longiflora, V. microcarpa, V. monoica, V. omnilingua, V. palandensis, V. stipulata, V. parviflora, V. sp., V. x heilborne, V. x heilborne cv pentagona, V. x heilborne cv chrysopetala, Carica papaya, Jaracatia digitata y J. spinosa by DNA amplifications using 14 aleatory primers from AA, AC, AM and AN series of Operon Technologies Inc. The used RAPD primers produced 76 polymorphic fragments with sizes between 368 and 2102 base pairs (bp). The cluster and principal coordinate analysis grouped the accessions of each kind among them and the results were consistent with previous studies. The dendrogram separated clearly the three genera, however, based on these results, studies and morphological observations, the creation of a new genera that groups the Vasconcellea candicans accessions is suggested. Furthermore, the authors support the hypothesis of designating the materials collected in the Molleturo zone as a new taxón of the genera Vasconcellea. As in other studies, the results suggest possible events of interspecific hybridization within Vasconcellea genus.