Abstract
Several different technical approaches could be taken in the development of a genetic engineering system in higher plants. Our laboratory is planning to construct molecular cloning vehicles in E. coli which can be used in higher plant cells and in regenerated higher plants. By combining isolated transcriptional “promotors” from plant DNA and known bacterial genes, we hope to obtain selectable genetic markers for plant cells. Fragments of rDNA and other repeat sequence DNA from host plants are being isolated as a homologous sequence for recombination with the host genome. The rationale of our plan is outlined herein and our results on the isolation of promoter sequences from a plant DNA virus are summarized.
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