Genetic insights into the globally invasive and taxonomically problematic tree genus prosopis

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dc.contributor.authorCastillo, Maria L.en_ZA
dc.contributor.authorSchaffner, Ursen_ZA
dc.contributor.authorVan Wilgen, Brian W.en_ZA
dc.contributor.authorMontano, Noe Manuelen_ZA
dc.contributor.authorBustamante, Ramiro O.en_ZA
dc.contributor.authorCosacov, Andreaen_ZA
dc.contributor.authorMathese, Megan J.en_ZA
dc.contributor.authorLe Roux, Johannes J.en_ZA
dc.date.accessioned2021-02-19T10:08:18Z
dc.date.accessioned2021-08-25T13:34:12Z
dc.date.available2021-02-19T10:08:18Z
dc.date.available2021-08-25T13:34:12Z
dc.date.issued2020
dc.descriptionCITATION: Castillo, M. L. et al. 2020. Genetic insights into the globally invasive and taxonomically problematic tree genus Prosopis. AoB Plants, 13(1), doi:10.1093/aobpla/plaa069.
dc.description.abstractENGLISH ABSTRACT: Accurate taxonomic identification of alien species is crucial to detect new incursions, prevent or reduce the arrival of new invaders and implement management options such as biological control. Globally, the taxonomy of non-native Prosopis species is problematic due to misidentification and extensive hybridization. We performed a genetic analysis on several Prosopis species, and their putative hybrids, including both native and non-native populations, with a special focus on Prosopis invasions in Eastern Africa (Ethiopia, Kenya and Tanzania). We aimed to clarify the taxonomic placement of non-native populations and to infer the introduction histories of Prosopis in Eastern Africa. DNA sequencing data from nuclear and chloroplast markers showed high homology (almost 100%) between most species analysed. Analyses based on seven nuclear microsatellites confirmed weak population genetic structure among Prosopis species. Hybrids and polyploid individuals were recorded in both native and non-native populations. Invasive genotypes of P. juliflora in Kenya and Ethiopia could have a similar native Mexican origin, while Tanzanian genotypes likely are from a different source. Native Peruvian Prosopis pallida genotypes showed high similarity with non-invasive genotypes from Kenya. Levels of introduced genetic diversity, relative to native populations, suggest that multiple introductions of P. juliflora and P. pallida occurred to Eastern Africa. Polyploidy may explain the successful invasion of P. juliflora in Eastern Africa. The polyploid Prosopis juliflora was highly differentiated from the rest of the (diploid) species within the genus. The lack of genetic differentiation between most diploid species in their native ranges supports the notion that hybridization between allopatric species may occur frequently when they are co-introduced into non-native areas. For regulatory purposes, we propose to treat diploid Prosopis taxa from the Americas as a single taxonomic unit in non-native ranges.en_ZA
dc.description.versionPublisher's version
dc.format.extent13 pages : illustrations, mapsen_ZA
dc.identifier.citationCastillo, M.L.; Schaffner, U.; van Wilgen, B.W.; Montaño, N.M.; Bustamante, R.O.; Cosacov, A.; Mathese, M.J.; Le Roux, J.J. (2020). Genetic insights into the globally invasive and taxonomically problematic tree genus Prosopis. AoB Plants 13, plaa069, 13 pages. DOI: 10.1093/aobpla/plaa069.
dc.identifier.issn2041-2851 (online)
dc.identifier.urihttp://hdl.handle.net/10019.1/113042
dc.rights.holderAuthors retain copyright
dc.subject.lcshTrees -- Genetic aspectsen_ZA
dc.subject.lcshInvasive alien species -- Geneticsen_ZA
dc.subject.lcshIntroduced organisms -- Biological controlen_ZA
dc.subject.lcshInvasive plants -- Geographical distribution -- Monitoringen_ZA
dc.subject.lcshProsopis juliflora -- Africa, East -- Geographical distributionen_ZA
dc.subject.lcshMesquite -- Ecologyen_ZA
dc.subject.lcshGeneticsen_ZA
dc.titleGenetic insights into the globally invasive and taxonomically problematic tree genus prosopisen_ZA
dc.typeArticleen_ZA
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