Avaliação morfoagronômica e molecular de genótipos de maracujá-do-mato no agreste pernambucano

Abstract

The Passiflora cincinnata Mast. species is gaining popularity in the market and it has been considered a wild species that has great potential to contribute to the genetic improvement of commercial passion fruit. This study aims to evaluate the genotypes of wild passion fruit (P. cincinnata) by using morphological descriptors, agronomic traits and molecular markers ISSR. The experimental was randomized blocks in simple scheme with five replications and two plants per plot. For morphoagronomic characterization were evaluated 22 quantitative traits and 13 qualitative characteristics. For molecular characterization 12 ISSR primers were tested. Ac cording to the mean squares obtained from the analyzes of the variance to 21 traits evaluated, it can be highlighted that the significant differences (p <0.01) among the means of the genotypes for all traits. It was found that for the 21 morphological traits measured, which contributed most to the diversity was the MI (internode mean) with 43.12%, followed by DH5 (diameter stems to 5 cm of soil) and LS (spread sepal). The average similarity found was 68%. UBC 887 and UBC 841 primers stood out with the highest values for the attributes of the markers observed, demonstrating suitability to use in researches of different types of P. cincinnata. It was diagnosed low genetic variability among genotypes. The genotypes have potential to be used in breeding programs, especially those exploiting obtaining ornamental passiflora.