Search Results - John Colvin
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Species Concepts as Applied to the Whitefly Bemisia tabaci Systematics: How Many Species Are There?
Published 2012-02-01Get full textThe worldwide distribution and extensive genetic diversity of the whitefly, Bemisia tabaci, has long been recognized. However, the levels of separation within B. tabaci and the nomenclature of the various genetic groups have been a subject of debate. Recent phylogenetic analyses indicate that B. tab...
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Next Generation Transcriptome Sequencing and Quantitative Real-Time PCR Technologies for Characterisation of the Bemisia tabaci Asia 1 mtCOI Phylogenetic Clade
Published 2012-02-01Get full textA programme of functional genomics research is underway at the University of Greenwich, UK, to develop and apply genomics technologies to characterise an economically-important but under-researched Bemisia tabaci (Hemiptera: Aleyrodidae), the Asia 1 mtCOI phylogenetic group. A comparison of this put...
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Bemisia tabaci Phylogenetic Groups in India and the Relative Transmission Efficacy of Tomato leaf curl Bangalore virus by an Indigenous and an Exotic Population
Published 2012-02-01Get full textBemisia tabaci adults from various host-plant species were collected from 31 regions across India. 266 B. tabaci samples were first screened by RAPD-PCR to examine molecular variability and to select individuals with different fingerprints. Host-plant and region of collection were then used to selec...
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African Cassava Whitefly, Bemisia tabaci, Resistance in African and South American Cassava Genotypes
Published 2012-02-01Get full textThe whitefly, Bemisia tabaci, is a major pest of cassava, particularly in Africa where it is responsible both for the transmission of plant viruses and, increasingly, for direct damage due to feeding by high populations. To date, there have been no practical solutions to combat this emerging problem...
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Outbreak-driven differences in the microbiome composition and diversity of two cassava whitefly Bemisia tabaci mitotypes SSA1-SG1 and SSA1-SG2
Published 2025-07-01Get full textSince the 1990s, outbreaking populations of the whitefly Bemisia tabaci species complex (Sub-Saharan Africa 1 and 2) have heavily infested cassava in Uganda and eastern Africa. These superabundant SSA1 whiteflies from outbreaking areas carry microbiomes that might influence their fitness. Nonetheles...
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Socio-Economic and Scientific Impact Created by Whitefly-Transmitted, Plant-Virus Disease Resistant Tomato Varieties in Southern India
Published 2012-02-01Get full textResearch carried out to assess the impact of open-pollinated Tomato leaf curl virus (ToLCV)-resistant tomatoes and hybrids on the livelihoods of resource-poor farmers in Southern India is described and discussed. Three high-yielding ToLCV-resistant tomato varieties were developed initially using con...
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