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SSR-Based Analysis of Genetic Diversity and Structure of Sweet Cherry (Prunus avium L.) from 19 Countries in Europe

Teresa Barreneche 1 María Cárcamo de la Concepción 2 Marine Blouin-Delmas 3 Matthew Ordidge 4 Hilde Nybom 5 Gunars Lacis 6 Daina Feldmane 6 Jiri Sedlak 7 Mekjell Meland 8 Hedi Kaldmäe 9 Kersti Kahu 9 Zsuzsanna Békefi 10 Sanda Stanivuković 11 Gordana Đurić 11 Monika Höfer 12 Martin Galik 13 Elisabeth Schüller 14 Andreas Spornberger 14 Sorina Sirbu 15 Pavlina Drogoudi 16 Ana Cristina Agulheiro-Santos 17 Ossama Kodad 18 Aleš Vokurka 19 Marc Lateur 20 Felicidad Fernández Fernández 21 Daniela Giovannini 22 José Quero-Garcia 1, *
Abstract : Sweet cherry (Prunus avium L.) is a temperate fruit species whose production might be highly impacted by climate change in the near future. Diversity of plant material could be an option to mitigate these climate risks by enabling producers to have new cultivars well adapted to new environmental conditions. In this study, subsets of sweet cherry collections of 19 European countries were genotyped using 14 SSR. The objectives of this study were (i) to assess genetic diversity parameters, (ii) to estimate the levels of population structure, and (iii) to identify germplasm redundancies. A total of 314 accessions, including landraces, early selections, and modern cultivars, were monitored, and 220 unique SSR genotypes were identified. All 14 loci were confirmed to be polymorphic, and a total of 137 alleles were detected with a mean of 9.8 alleles per locus. The average number of alleles (N = 9.8), PIC value (0.658), observed heterozygosity (Ho = 0.71), and expected heterozygosity (He = 0.70) were higher in this study compared to values reported so far. Four ancestral populations were detected using STRUCTURE software and confirmed by Principal Coordinate Analysis (PCoA), and two of them (K1 and K4) could be attributed to the geographical origin of the accessions. A N-J tree grouped the 220 sweet cherry accessions within three main clusters and six subgroups. Accessions belonging to the four STRUCTURE populations roughly clustered together. Clustering confirmed known genealogical data for several accessions. The large genetic diversity of the collection was demonstrated, in particular within the landrace pool, justifying the efforts made over decades for their conservation. New sources of diversity will allow producers to face challenges, such as climate change and the need to develop more sustainable production system
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Submitted on : Tuesday, September 28, 2021 - 11:42:24 AM
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Teresa Barreneche, María Cárcamo de la Concepción, Marine Blouin-Delmas, Matthew Ordidge, Hilde Nybom, et al.. SSR-Based Analysis of Genetic Diversity and Structure of Sweet Cherry (Prunus avium L.) from 19 Countries in Europe. Plants, MDPI, 2021, 10, pp.1983. ⟨10.3390/plants10101983⟩. ⟨hal-03356644⟩



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