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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Uncovering the tracks of a recent and rapid invasion: The case of the fruit fly pest Bactrocera invadens (Diptera: Tephritidae) in Africa
Molecular Ecology, Volume 18, No. 23, Year 2009
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Description
Phytophagous insects of the genus Bactrocera are among the most economically important invasive fruit fly pests. In 2003, an unknown Bactrocera species was found in Kenya. First identified as an 'aberrant form' of the Asian B. dorsalis complex, it was later recognized as a new species, Bactrocera invadens. Within 2 years of its discovery, the species was recorded in several African countries, becoming an important quarantine pest. As this invasive fly was discovered only recently, no data are available on its invasion pattern in Africa. This pilot study attempts to infer from genetic data the dynamic aspects of the African invasion of this pest. Using microsatellite markers, we evaluated the level of genetic diversity and the extent of common ancestry among several African populations collected across the invaded areas. A sample from the Asian Sri Lankan population was analysed to confirm the Asian origin of this pest. Genetic data cast no doubt that Sri Lanka belongs to the native range, but only a small percentage of its genotypes can be found in Africa. African populations display relatively high levels of genetic diversity associated with limited geographical structure and no genetic footprints of bottlenecks. These features are indicative of processes of rapid population growth and expansion with possible multiple introductions. In the span of relatively few years, the African invasion registered the presence of at least two uncorrelated outbreaks, both starting from the East. The results of the analyses support that invasion started in East Africa, where B. invadens was initially isolated. © 2009 Blackwell Publishing Ltd.
Authors & Co-Authors
Khamis, Fathiya Mbarak
Italy, Pavia
Università Degli Studi Di Pavia
Kenya, Nairobi
International Centre of Insect Physiology and Ecology Nairobi
Kenya, Nairobi
Kenyatta University
Karam, Nisrine
Italy, Pavia
Università Degli Studi Di Pavia
Ekesi, Sunday
Kenya, Nairobi
International Centre of Insect Physiology and Ecology Nairobi
de Meyer, Marc
Belgium, Tervuren
Royal Museum for Central Africa
Bonomi, Angelica
Italy, Pavia
Università Degli Studi Di Pavia
Gomulski, Ludvik Marcus
Italy, Pavia
Università Degli Studi Di Pavia
Scolari, Francesca
Italy, Pavia
Università Degli Studi Di Pavia
Gabrieli, Paolo
Italy, Pavia
Università Degli Studi Di Pavia
Siciliano, Paolo
Italy, Pavia
Università Degli Studi Di Pavia
Masiga, Daniel K.
Kenya, Nairobi
International Centre of Insect Physiology and Ecology Nairobi
Kenya, Eucharia Unoma
Kenya, Nairobi
Kenyatta University
Gasperi, Giuliano
Italy, Pavia
Università Degli Studi Di Pavia
Malacrida, Anna Rodolfa
Italy, Pavia
Università Degli Studi Di Pavia
Guglielmino, Carmela Rosalba
Italy, Pavia
Università Degli Studi Di Pavia
Statistics
Citations: 69
Authors: 14
Affiliations: 4
Identifiers
Doi:
10.1111/j.1365-294X.2009.04391.x
ISSN:
09621083
e-ISSN:
1365294X
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study
Study Locations
Multi-countries
Kenya