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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad de Costa Rica
2021
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| Online Access: | https://www.redalyc.org/articulo.oa?id=44969403021 https://www.redalyc.org/journal/449/44969403021/ https://www.redalyc.org/journal/449/44969403021/html/ https://www.redalyc.org/journal/449/44969403021/44969403021.epub https://www.redalyc.org/journal/449/44969403021/movil |
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Table of Contents:
- Diversity and genetic structure of Spondias tuberosa (Anacardiaceae) accessions based on microsatellite loci Viviane Nunes-dos-Santos Carlos-Antônio Fernandes-Santos Viseldo Ribeiro-de-Oliveira Antonio-Elton Da-Silva-Costa Fabricio-Francisco Santos-da-Silva Biología SSR AMOVA Umbu tree Introduction: Spondias tuberosa is a tree endemic to the semiarid region of Brazil with fruticulture potential. Objective: To estimate the diversity and genetic structure of S. tuberosa accessions from four areas of the semiarid region of Brazil, in order to facilitate conservation genetic resources studies in this species. Methods: DNA was extracted, using the CTAB 2x method, from leaf samples of 24 accessions of S. tuberosa available in the germplasm bank at Embrapa Semiárido, Brazil. Ten microsatellite loci were used in this study. Results: The UPGMA dendrogram, generated with a Jaccard coefficient similarity matrix, contains four groups at a 0.44 cutoff point. The similarity coefficient ranged from 0.30 to 0.84, indicating great divergence among the accessions. A Bayesian analysis conducted with the software Structure suggests there are two subpopulations, one formed by accessions from the Januária region and another by accessions from the Juazeiro, Uauá and Petrolina regions. The ΦST value of 0.12 for the analysis of molecular variance indicates moderate genetic differentiation among the four populations, suggesting that the genetic variability is moderately structured in function of region. Conclusions: Together, the analyses indicate that the genetic diversity of S. tuberosa is not uniformly distributed in the studied regions. Thus, germplasm from a greater number of populations should be collected to increase the germplasm bank genetic diversity of the species. 2021 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44969403021 https://www.redalyc.org/journal/449/44969403021/ https://www.redalyc.org/journal/449/44969403021/html/ https://www.redalyc.org/journal/449/44969403021/44969403021.epub https://www.redalyc.org/journal/449/44969403021/movil 10.15517/rbt.v69i2.44194 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.2 Vol.69