Enxertia de cultivares de maracujazeiro azedo sobre Passiflora foetida L.: desempenho agronômico das cultivares, caracterização morfoagronômica, variabilidade genética do portaenxerto e resistência a fusariose

Abstract

The passion fruit production has gained great importance in the world, Brazil is the largest producer and consumer. However, production has been affected due to the occurrence of diseases that have been limiting factor for passion fruit cultivation, reducing the life of orchards and increasing production costs due to the need for the application of control measures. The use of grafted seedlings of sour passion fruit in wild species has been advocated as an alternative for the management of diseases caused by pathogens inhabitants of the soil, although more information about this technology solution are still needed. Thus, there were five trials aimed to study the anticipation of grafting reaction eight cultivars of passion fruit and a cultivar grafted on Passiflora foetida L. planted in an area with fusariosis history in Mossoro region (RN), characterization and agronomic performance passion fruit grafted and morphoagronomic and molecular evaluation of species P. foetida access for selected rootstock passionfruit. The anticipation of grafting favored the precocity in the production of seedlings. The passion fruit grafted onto P. foetida is showing a promising technological solution for the region. The passion fruit grafted onto P. foetida showed a great development in vigor and earliness to the beginning of the reproductive phase, with good agronomic characteristics and fruit quality that meet all market requirements. The study of P. foetida access based on agronomic traits and genetic variability based on ISSR and RAPD markers showed the existence of qualitative and quantitative morphological differences and genetic variability among accessions, which bodes well for selection of work programs genetical enhancement