Genetic insights into the globally invasive and taxonomically problematic tree genus Prosopis
Author
dc.contributor.author
Castillo, María L.
Author
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Schaffner, Urs
Author
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Van Wilgen, Brian W.
Author
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Montaño, Noé Manuel
Author
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Bustamante Araya, Ramiro
Author
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Cosacov, Andrea
Author
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Mathese, Megan J.
Author
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Le Roux, Johannes J.
Admission date
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2021-08-04T22:57:07Z
Available date
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2021-08-04T22:57:07Z
Publication date
dc.date.issued
2020
Cita de ítem
dc.identifier.citation
AoB Plants 2021, Vol. 13, No. 1
es_ES
Identifier
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10.1093/aobpla/plaa069
Identifier
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https://repositorio.uchile.cl/handle/2250/181090
Abstract
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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 nonnative
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 Prosopis 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 in
Eastern Africa. Polyploidy may explain the successful invasion of P. juliflora in Eastern Africa. The polyploid P. 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.
es_ES
Patrocinador
dc.description.sponsorship
Swiss National Science Foundation (SNSF)
Swiss Agency for Development and Cooperation (SDC) 400440_152085
CABI