Abstract
Molecular genetic variability studies are essential to complement the agronomic characterization of yellow passion fruit genotypes (Passiflora edulis Sims). Therefore, this study aimed at evaluating the genetic diversity of 24 genotypes of yellow passion fruit obtained from a research program developed by the University of Brasilia and Embrapa Cerrados, using RAPD molecular markers. RAPD markers were obtained from eight decamer primers and converted into a matrix of binary data, from which genetic dissimilarities among genotypes were estimated, and clustering analysis was performed. A total of 54 RAPD markers were obtained, with 6.8 bands per primer on average. From this total, 46 (85.2%) RAPD markers were polymorphic. The OPD10 primer presented the highest number of polymorphic bands. The high percentage of polymorphic markers evidenced the existence of genetic variability among genotypes. Nei’s genetic distance between genotypes ranged from 0.043 to 0.451. Clustering resulted in the formation of at least five groups of similarity.
Highlights
Passiflora is the numerically and economically most important genus of the Passifloraceae family
The evaluated genotypes were obtained from a research program developed by the University of Brasilia (UnB) and Embrapa (Empresa Brasileira de Pesquisa Agropecuária-Brazilian Agricultural Research Corporation), which used yield and disease resistance as selection criteria
The eight primers generated a total of 54 RAPD markers
Summary
Passiflora is the numerically and economically most important genus of the Passifloraceae family. Among the 150 accepted species in Brazil (Bernacci et al, 2015), 70 produce edible fruits and, exhibit great economic importance for the Brazilian fruticulture (Cunha & Barbosa, 2002). Yellow passion fruit (Passiflora edulis Sims) is the species with the highest economic importance in the country due to its fruit quality, fruit yield, and industrial yield (Meletti & Brückner, 2001). The Brazilian mean yield of yellow passion fruit is approximately 14.1 t ha-1 year-1 (Anuário Brasileiro da Fruticultura [ABF], 2018). Increased yields have been recently reported in the Brazilian savanna region. Despite the low yields recorded, Brazil is the world's largest producer and consumer of passion fruit (ABF, 2018)
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