Extensive settlement of the invasive MEAM1 population of Bemisia tabaci (Hemiptera: Aleyrodidae) in the Caribbean and rare detection of indigenous populations
Bemisia tabaci populations belonging to Middle East-Asia Minor one (MEAM1) and Mediterranean (MED) groups (formerly biotype B and Q, respectively) have spread throughout the world. Although the introduction of MEAM1 is documented from several Caribbean islands, it is generally not known whether MED has also been introduced; whether indigenous populations have survived; and if in the afÞrmative, to which group(s) they belonged. Whiteßies were collected from seven islands on various plant species. The prevalence of MEAM1 and non-MEAM1 individuals was assessed using a microsatellite approach validated with sequences of the mitochondrial cytochrome oxidase I (mtCOI) gene. Of the 262 samples tested, 247 exhibited the MEAM1 pattern, whereas none showed the MED pattern. The mtCOI gene was partially sequenced from a sample of individuals exhibiting MEAM1 (n _ 15) and non-MEAM1 patterns (n _ 8) and compared with type sequences. The 15 individuals exhibiting the MEAM1 pattern were conÞrmed to belong to MEAM1. Of the eight individuals representative of the sixnon-MEAM1patterns, two belonged to the indigenousNewWorld (NW) group of B. tabaci (NW), one belonged to a distinct species of Bemisia, and Þve belonged to MEAM1. One individual belonging to NW exhibited 99.9% nucleotide identity with a NWindividual from Puerto Rico. The other was identiÞed as the most divergent individual of the North and Central American genetic cluster.Weconclude that a highly homogenousMEAM1population has extensively settled in the Caribbean and that heterogeneous NW populations were still detectable although severely displaced.
| Main Authors: | , , , , , , , , |
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| Format: | article biblioteca |
| Language: | eng |
| Subjects: | H10 - Ravageurs des plantes, Bemisia tabaci, mauvaise herbe, plante ornementale, plante de culture, http://aims.fao.org/aos/agrovoc/c_30755, http://aims.fao.org/aos/agrovoc/c_8347, http://aims.fao.org/aos/agrovoc/c_5417, http://aims.fao.org/aos/agrovoc/c_1972, http://aims.fao.org/aos/agrovoc/c_2364, http://aims.fao.org/aos/agrovoc/c_3406, http://aims.fao.org/aos/agrovoc/c_7933, http://aims.fao.org/aos/agrovoc/c_4635, http://aims.fao.org/aos/agrovoc/c_1320, http://aims.fao.org/aos/agrovoc/c_1997, http://aims.fao.org/aos/agrovoc/c_3081, |
| Online Access: | http://agritrop.cirad.fr/561600/ http://agritrop.cirad.fr/561600/1/document_561600.pdf |
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