Diversité génétique des cultivars locaux de melon (Cucumis melo L.) collecté au sud tunisien: Valorisation pour un programme de sélection et de conservation génétique

Mokhtar Elbekkay; Hammadi Hamza; Ali Ferchichi; Naceur Djebali

doi:10.56027/JOASD.042022

Authors

Mokhtar Elbekkay
Hammadi Hamza
Ali Ferchichi
Naceur Djebali

DOI:

https://doi.org/10.56027/JOASD.042022

Keywords:

Cucumis melo, Oasis, Genetic diversity, morphological markers, RAPD markers

Abstract

This work has the objective to study the genetic diversity and to evaluate the agronomic potential of local melon cultivars collected in Southern Tunisia. The morphological characterization of 22 local cultivars of melon based on 32 traits showed that they differ from the commercial variety Ananas. Indeed, the local cultivars are characterized by an early production, larger size and low sugar content of fruit. The genetic diversity of the melon cultivars, assessed using four RAPD markers, showed a polymorphism rate of 95 %. The PCA analysis according to the first three axes which explain 54.7% of total variability indicates a clear distinction between the Ananas variety and the local cultivars. The correlations between distance matrices of the morphological and the molecular data showed that the fruit length, fruit diameter, size of pistil scar and maximum thickness of flesh are significantly correlated with some RAPD markers. This study showed the clear distinction of the local melon cultivars in comparison to the commercial one, which has practical impact by the use of local genotypes to improve some traits in the commercial melon cultivars.

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