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Open AccessArticle

Genetic Diversity of Local Peach (Prunus persica) Accessions from La Palma Island (Canary Islands, Spain)

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Subtropical Fruit Crops Department, Instituto de Hortofruticultura Subtropical y Mediterránea La Mayora (IHSM La Mayora-CSIC-UMA), 29750 Algarrobo-Costa, 29750 Málaga, Spain
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Laboratorio de Agrobiología Juan José Bravo Rodríguez (Cabildo Insular de La Palma), Unidad Técnica del IPNA-CSIC. S/C La Palma. 38700 Canary Islands, Spain
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IMAREFI, University of Guadalajara, 45110 Jalisco, Mexico
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Département de Biologie, Faculté des Sciences de Tunis, Université Tunis el Manar, 2092 Tunis, Tunisia
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Unidad de Hortofruticultura. Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA). Avda. Montañana 930, 50059 Zaragoza, Spain
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Instituto Agroalimentario de Aragón—IA2 (CITA-Universidad de Zaragoza), 50013 Zaragoza, Spain
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(4), 457; https://doi.org/10.3390/agronomy10040457
Received: 17 February 2020 / Revised: 4 March 2020 / Accepted: 20 March 2020 / Published: 25 March 2020
(This article belongs to the Special Issue Genetic Diversity Evaluation of the Fruit Trees)
Peach (Prunus persica) is an economically important temperate fruit crop due to its edible fruits. Due to the need to develop new varieties better adapted to climate change, it is of great interest to find germplasm adapted to warmer conditions, such as those found in the Canary Islands. Peach was an important crop during the last century in one of those islands (La Palma), but its cultivation has been abandoned in recent years. Currently, commercial production is relict and isolated trees are relegated to family orchards with little management. With the objective to characterize and prevent the loss of local varieties of this crop, peach trees were sampled along La Palma. A total of 89 local peach accessions were prospected and analyzed with 10 single-sequence repeat (SSR) loci, which permitted 28 different genotype profiles to be detected. These genotypes were compared to 95 Spanish peach landraces conserved in an ex situ collection, and 26 additional samples from eight different countries. Results showed that the peach genetic diversity found in La Palma was low. In addition, a relation between La Palma samples and other Spanish peaches was observed, which could indicate the arrival of genetic material from the Iberian Peninsula and subsequent intercrossing and local selection of the genotypes more adapted to the subtropical climate of the island. The population structure reflects a grouping of the samples based on fruit type and geographic origin. View Full-Text
Keywords: genetic diversity; germplasm; home gardens; microsatellites; simple sequence repeats (SSR) genetic diversity; germplasm; home gardens; microsatellites; simple sequence repeats (SSR)
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Pérez, V.; Larrañaga, N.; Abdallah, D.; Wünsch, A.; Hormaza, J.I. Genetic Diversity of Local Peach (Prunus persica) Accessions from La Palma Island (Canary Islands, Spain). Agronomy 2020, 10, 457.

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