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Open AccessArticle

Assessment of Genetic Diversity of the “Acquaviva Red Onion” (Allium cepa L.) Apulian Landrace

1
Department of Soil, Plant and Food Sciences, Plant Genetics and Breeding Unit University of Bari, Via Amendola 165/A, 70125 Bari, Italy
2
Department of the Sciences of Agriculture, Food and Environment, University of Foggia, Via Napoli 25, 71122 Foggia, Italy
3
Department of Biosciences, Biotechnologies and Biopharmaceuticals, University of Bari, Via Orabona 4, 70125 Bari, Italy
4
Department of Energy Technologies, Bioenergy, Biorefinery and Green Chemistry Division, ENEA Trisaia Research Center, S.S. 106 Ionica, km 419+500, 75026 Rotondella (MT), Italy
*
Authors to whom correspondence should be addressed.
Plants 2020, 9(2), 260; https://doi.org/10.3390/plants9020260
Received: 31 December 2019 / Revised: 13 February 2020 / Accepted: 14 February 2020 / Published: 18 February 2020
(This article belongs to the Special Issue Germplasm Diversity for Sustainability and Crop Improvement)
Onion (Allium cepa L.) is the second most important vegetable crop worldwide and is widely appreciated for its health benefits. Despite its significant economic importance and its value as functional food, onion has been poorly investigated with respect to its genetic diversity. Herein, we surveyed the genetic variation in the “Acquaviva red onion” (ARO), a landrace with a century-old history of cultivation in a small town in the province of Bari (Apulia, Southern of Italy). A set of 11 microsatellite markers were used to explore the genetic variation in a germplasm collection consisting of 13 ARO populations and three common commercial types. Analyses of genetic structure with parametric and non-parametric methods highlighted that the ARO represents a well-defined gene pool, clearly distinct from the Tropea and Montoro landraces with which it is often mistaken. In order to provide a description of bulbs, usually used for fresh consumption, soluble solid content and pungency were evaluated, showing higher sweetness in the ARO with respect to the two above mentioned landraces. Overall, the present study is useful for the future valorization of the ARO, which could be promoted through quality labels which could contribute to limit commercial frauds and improve the income of smallholders. View Full-Text
Keywords: SSR markers; onion landraces; genetic diversity; morphological and quality traits SSR markers; onion landraces; genetic diversity; morphological and quality traits
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Ricciardi, L.; Mazzeo, R.; Marcotrigiano, A.R.; Rainaldi, G.; Iovieno, P.; Zonno, V.; Pavan, S.; Lotti, C. Assessment of Genetic Diversity of the “Acquaviva Red Onion” (Allium cepa L.) Apulian Landrace. Plants 2020, 9, 260.

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