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Type: Journal article
Title: Understanding invasion history: Genetic structure and diversity of two globally invasive plants and implications for their management
Author: Prentis, P.
Sigg, D.
Raghu, S.
Dhileepan, K.
Pavasovic, A.
Lowe, A.
Citation: Diversity and Distributions: a journal of conservation biogeography, 2009; 15(5):822-830
Publisher: Blackwell Publishing Ltd.
Issue Date: 2009
ISSN: 1366-9516
Abstract: Resolving the origin of invasive plant species is important for understanding the introduction histories of successful invaders and aiding strategies aimed at their management. This study aimed to infer the number and origin(s) of introduction for the globally invasive species, Macfadyena unguis-cati and Jatropha gossypiifolia using molecular data. Location  Native range: Neotropics; Invaded range: North America, Africa, Europe, Asia, Pacific Islands and Australia. Methods  We used chloroplast microsatellites (cpSSRs) to elucidate the origin(s) of introduced populations and calculated the genetic diversity in native and introduced regions. Results  Strong genetic structure was found within the native range of M. unguis-cati, but no genetic structuring was evident in the native range of J. gossypiifolia. Overall, 27 haplotypes were found in the native range of M. unguis-cati. Only four haplotypes were found in the introduced range, with more than 96% of introduced specimens matching a haplotype from Paraguay. In contrast, 15 haplotypes were found in the introduced range of J. gossypiifolia, with all invasive populations, except New Caledonia, comprising multiple haplotypes. Main conclusions  These data show that two invasive plant species from the same native range have had vastly different introduction histories in their non-native ranges. Invasive populations of M. unguis-cati probably came from a single or few independent introductions, whereas most invasive J. gossypiifolia populations arose from multiple introductions or alternatively from a representative sample of genetic diversity from a panmictic native range. As introduced M. unguis-cati populations are dominated by a single haplotype, locally adapted natural enemies should make the best control agents. However, invasive populations of J. gossypiifolia are genetically diverse and the selection of bio-control agents will be considerably more complex.
Keywords: Biological control
biological invasions
genetic diversity
introduction history
Jatropha gossypiifolia
Macfadyena unguis-cati
Rights: Website © 2009 Ingenta. Article copyright remains with the publisher, society or author(s) as specified within the article
DOI: 10.1111/j.1472-4642.2009.00592.x
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Appears in Collections:Aurora harvest
Earth and Environmental Sciences publications
Environment Institute Leaders publications

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