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| Natura: | Artículo científico |
| Lingua: | en |
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Instituto de Botánica Darwinion
2021
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=66976163006 https://www.redalyc.org/journal/669/66976163006/ https://www.redalyc.org/journal/669/66976163006/html/ https://www.redalyc.org/journal/669/66976163006/66976163006.epub https://www.redalyc.org/journal/669/66976163006/movil |
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Sommario:
- GENETIC DIVERSITY AND FRAGMENTATION OF ASPIDOSPERMA QUEBRACHO-BLANCO (APOCYNACEAE) NATURAL HABITATS, CONSERVATION ISSUES IN CHACO FOREST AND SAVANNA BIOMES Thomáz S. Guerreiro Botelho Gecele Matos Paggi Maria Ana Farinaccio Biología issr dry forests deforestation espinilho fields Conservation unit Botelho, T. S. G.; G. M. Paggi & M. A. Farinaccio. 2021. Genetic diversity and fragmentation of Aspidosperma quebracho-blanco (Apocynaceae) natural habitats, conservation issues in Chaco forest and savanna biomes. Darwiniana, nueva serie 9(1): 115-129.The present study analyses the first data on genetic diversity of A. quebracho-blanco with the fragmentation of its natural habitat, supporting conservation strategies such as the definition of priority areas for conservation. DNA was extracted from 25 individuals of five populations of A. quebracho-blanco from Argentina, Paraguay, and Brazil. Six ISSR primers were used to characterize the genetic diversity and structure of this species. The genotypes were grouped according to a distance matrix, considering the genetic diversity indices of Nei (He), Shannon (H’), polymorphic information content (PIC), and heterozygosis (H). The populations showed an average genetic diversity that ranged from 0.09 to 0.15 for the Shannon index and from 0.19 to 0.31 for the Nei index; the Mantel test was not significant (r2 = 0.25, P = 0.106). The results obteined for the sampled populations reveal that conservation units are indispensable for conserving the species genetic resources. In addition, it would be essential to construct a germplasm bank for the Cordoba (Argentina) population, which is a population with high genetic diversity in a region of lower fragmentation compared to other regions evaluated, to ensure the conservation of A. quebracho-blanco. 2021 artículo científico 0011-6793 https://www.redalyc.org/articulo.oa?id=66976163006 https://www.redalyc.org/journal/669/66976163006/ https://www.redalyc.org/journal/669/66976163006/html/ https://www.redalyc.org/journal/669/66976163006/66976163006.epub https://www.redalyc.org/journal/669/66976163006/movil 10.14522/darwiniana.2021.91.932 en http://www.redalyc.org/revista.oa?id=669 Darwiniana application/pdf Instituto de Botánica Darwinion Darwiniana (Argentina) Num.1 Vol.9