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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Genetic diversity and geographic distribution of Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) genotypes associated with cassava in East Africa
Ecology and Evolution, Volume 2, No. 11, Year 2012
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Description
The genetic variability of whitefly (Bemisia tabaci) species, the vectors of cassava mosaic begomoviruses (CMBs) in cassava growing areas of Kenya, Tanzania, and Uganda, was investigated through comparison of partial sequences of the mitochondria cytochrome oxidase I (mtCOI) DNA in 2010/11. Two distinct species were obtained including sub-Saharan Africa 1 (SSA1), comprising of two sub-clades (I and II), and a South West Indian Ocean Islands (SWIO) species. Among the SSA1, sub-clade I sequences shared a similarity of 97.8-99.7% with the published Uganda 1 genotypes, and diverged by 0.3-2.2%. A pairwise comparison of SSA1 sub-clade II sequences revealed a similarity of 97.2-99.5% with reference southern Africa genotypes, and diverged by 0.5-2.8%. The SSA1 sub-clade I whiteflies were widely distributed in East Africa (EA). In comparison, the SSA1 sub-clade II whiteflies were detected for the first time in the EA region, and occurred predominantly in the coast regions of Kenya, southern and coast Tanzania. They occurred in low abundance in the Lake Victoria Basin of Tanzania and were widespread in all four regions in Uganda. The SWIO species had a sequence similarity of 97.2-97.7% with the published Reunion sequence and diverged by 2.3-2.8%. The SWIO whiteflies occurred in coast Kenya only. The sub-Saharan Africa 2 whitefly species (Ug2) that was associated with the severe CMD pandemic in Uganda was not detected in our study. © 2012 The Authors.
Authors & Co-Authors
Mugerwa, Habibu
Uganda, Kampala
National Crops Resources Research Institute
South Africa, Johannesburg
University of the Witwatersrand
Rey, Marie Emma Christine
South Africa, Johannesburg
University of the Witwatersrand
Alicai, Titus
Uganda, Kampala
National Crops Resources Research Institute
Ateka, Elijah Miinda
Kenya, Nairobi
Kenyatta University
Atuncha, Hellen
Kenya, Nairobi
Kenyatta University
Ndunguru, Joseph Canisius
Tanzania, Dar es Salaam
Mikocheni Agricultural Research Institute
Sseruwagi, Peter
Uganda, Kampala
National Crops Resources Research Institute
Statistics
Citations: 57
Authors: 7
Affiliations: 4
Identifiers
Doi:
10.1002/ece3.379
e-ISSN:
20457758
Research Areas
Genetics And Genomics
Study Locations
Multi-countries
Kenya
Tanzania
Uganda