Abstract
Key message
This work belongs to the Tunisian conservation strategies of local fruit tree resources. Results highlighted the important genetic richness of Tunisian peach as an unexplored source for peach future breeding.
Abstract
Tunisia is characterized by a rich genetic heritage of fruit trees. Nevertheless, local Tunisian accessions of different fruit crops face several threats that are causing a dramatic loss of some of these valuable landraces. This study was conducted to evaluate the genetic diversity and population structure of 23 Tunisian peach accessions using 27 microsatellite (SSR) loci. These Tunisian accessions were compared with accessions from America, mainland Spain and the island of La Palma (Canary Islands, Spain). A considerable genetic diversity was observed in Tunisian genotypes with allelic richness value of 0.47. The genetic richness was 0.37 in La Palma genotypes, 0.3 in mainland Spain and 0.38 in the American genotypes. Eight private alleles were obtained in the Tunisian genotypes, while six were observed in the mainland Spanish pool, five in the American pool and six in the La Palma pool. Structure analyses and similarity dendrogram based on SSRs were clearly consistent with a geographic structuring and highlighted the different introduction pathways of Prunus persica into Tunisia.
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Acknowledgements
We would like to gratefully thank Tunisian farmers, La Palma island farmers, and the CITA of Zaragoza (Spain), for kindly providing plant material. We express our gratitude to “Yolanda Verdún”, for technical support.
Funding
This research was supported by the Tunisian “Ministère de l’Enseignement Supérieur et de la Recherche Scientifique” and Grant PID2019-109566RB-I00 and PID2022-141851OB-I00 funded by MICIU/AEI/https://doi.org/10.13039/501100011033 and ERDF A way of making Europe, by the European Union.
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DA conducted the experiments and statistical analyses, developed the genetic analyses, and wrote the manuscript. GB provided some plant material, and discussed and corrected the content. VP provided some plant material and discussed the results. SBM discussed the results. AS-H and JH provided experimental instructions, supervised the work, and assisted in writing the manuscript.
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Abdallah, D., Baraket, G., Pérez, V. et al. Assessment of genetic diversity of local Tunisian peach accessions [Prunus persica (L.) Batsch] using SSR markers. Trees (2024). https://doi.org/10.1007/s00468-024-02520-x
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DOI: https://doi.org/10.1007/s00468-024-02520-x