Genetic Diversity among Some Walnut ( Juglans regia L.) Genotypes by SSR Markers

Murat Guney, Salih Kafkas, Hakan Keles, Mozhgan Zarifikhosroshahi, Muhammet Ali Gundesli, Sezai Ercisli, Tomas Necas and Geza Bujdoso
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Murat Guney: Department of Horticulture, Faculty of Agriculture, Yozgat Bozok University, Yozgat 66900, Turkey
Salih Kafkas: Department of Horticulture, Faculty of Agriculture, Cukurova University, Adana 01380, Turkey
Hakan Keles: Department of Horticulture, Faculty of Agriculture, Yozgat Bozok University, Yozgat 66900, Turkey
Mozhgan Zarifikhosroshahi: Department of Horticulture, Faculty of Agriculture, Cukurova University, Adana 01380, Turkey
Muhammet Ali Gundesli: Department of Horticulture, East Mediterranean Transitional Zone Agricultural Research Institute, Kahramanmaras 46140, Turkey
Sezai Ercisli: Department of Horticulture, Faculty of Agriculture, Ataturk University, Erzurum 25240, Turkey
Tomas Necas: Department of Fruit Science, Faculty of Horticulture in Lednice, Mendel University in Brno, Valticka 337, 69144 Lednice, Czech Republic
Geza Bujdoso: Institute of Horticultural Science, Hungarian University of Agriculture and Life Science, Villányi Str. 29-43, 1118 Budapest, Hungary

Sustainability, 2021, vol. 13, issue 12, 1-14

Abstract: The food needs for increasing population, climatic changes, urbanization and industrialization, along with the destruction of forests, are the main challenges of modern life. Therefore, it is very important to evaluate plant genetic resources in order to cope with these problems. Therefore, in this study, a set of ninety-one walnut ( Juglans regia L.) accessions from Central Anatolia region, composed of seventy-four accessions and eight commercial cultivars from Turkey, and nine international reference cultivars, was analyzed using 45 SSR (Simple Sequence Repeats) markers to reveal the genetic diversity. SSR analysis identified 390 alleles for 91 accessions. The number of alleles per locus ranged from 3 to 19 alleles with a mean value of 9 alleles per locus. Genetic dissimilarity coefficients ranged from 0.03 to 0.68. The highest number of alleles was obtained from CUJRA212 locus (Na = 19). The values of polymorphism information content (PIC) ranged from 0.42 (JRHR222528) to 0.86 (CUJRA212) with a mean PIC value of 0.68. Genetic distances were estimated according to the UPGMA (Unweighted Pair Group Method with Arithmetic Average), Principal Coordinates (PCoA), and the Structure-based clustering. The UPGMA and Structure clustering of the accessions depicted five major clusters supporting the PCoA results. The dendrogram revealed the similarities and dissimilarities among the accessions by identifying five major clusters. Based on this study, SSR analyses indicate that Yozgat province has an important genetic diversity pool and rich genetic variance of walnuts.

Keywords: Juglans regia; genetic diversity; SSR; PCoA; UPGMA; structure analysis (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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