Abstract
Cassava (Manihot esculenta Crantz) is a useful root crop for food, animal feed and various industrial materials including biofuel. Despite of its importance as an industrial crop, the genetic engineering approaches to manipulate transgenic plant development in cassava are limited. In this study, to develop new cultivar with high level of carotenoids and enhanced tolerance to environmental stresses, sweetpotato IbOr gene involved in accumulation of carotenoids was introduced into an Indonesian IDB high-yielding cassava cultivar under the control of oxidative stress-inducible SWPA2 promoter through Agrobacterium-mediated transformation of friable embryogenic calli. The 19 transgenic lines were successfully generated on the basis of gDNA-PCR and IbOr transcript levels for further characterization in terms of carotenoid contents and environmental stresses. Therefore, IbOr transgenic cassava plants may be developed for enhanced biomass production with high levels of carotenoids on marginal lands.
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