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Tag Archives: Weevil resistance

Efficient regeneration and transformation systems for improving resistance to weevils in Ugandan sweetpotato cultivars

Sweetpotato is cultivated worldwide as a valuable source of food. Weevils cause 60-100% loss of productivity. The present study aims at genetically transforming selected Ugandan sweetpotato cultivars with genes that confer resistance to weevils. A tissue culture method is being optimised to be coupled with Agrobacterium transformation technique for regeneration …

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Enhancing sweetpotato resistance to African weevils (Cylas puncticollis and Cylas brunneus) through transgenic breeding

Sweetpotato production is greatly constrained by two weevil species; Cylas puncticollis and C. brunneus that cause yield losses of up to 80%. The use of resistant sweetpotato cultivars is the most sustainable strategy to control the weevils. However, little success has been realized in developing resistant cultivars. Genetic engineering is …

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Weevil resistant sweetpotato through biotechnology

With the aim of “feeding the people, not the weevils” this project is combining conventional breeding and biotechnology to combat the pernicious and devastating consequences of sweetpotato weevil. Results to date include the identification of three insecticidal proteins and the introduction of putative resistance genes into sweetpotato varieties. The resistance …

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Expression of Soybean Proteinase Inhibitor in Sweetpotato

Transformation of sweetpotato (Ipomoea batatas) with serine-type proteinase inhibitors (Pls) offer a new strategy for developing host resistance against sweetpotato weevil (Cyclas spp.), the major threat to sweetpotato worldwide. This paper describes the Agrobacterium-mediated transformation of sweetpotato with a soybean kunitz trypsin inhibitor (SKTI-4) cDNA clone and the analysis of recombinant …

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