| Literature DB >> 1511138 |
D Robertson1, A K Weissinger, R Ackley, S Glover, R R Sederoff.
Abstract
Stable transformation of Norway spruce tissue has been obtained following bombardment of mature somatic embryos with pRT99gus, a plasmid that contains neo coding for NPTII, and gusA, coding for beta-glucuronidase, both fused to the CaMV 35S promoter. At least 8 lines have been stably transformed (over 15 months in culture) following bombardment and selection on kanamycin. Polymerase chain reaction analyses showed a high frequency of cotransformation of the gusA and neo genes. The frequency of coexpression of the selected and unselected markers was 100%. DNA/DNA hybridization of one transformed line provided conclusive evidence of stable integration and showed copy numbers of over 10 plasmid sequences per genome. None of the transformed lines has remained embryogenic.Entities:
Mesh:
Substances:
Year: 1992 PMID: 1511138 DOI: 10.1007/bf00040525
Source DB: PubMed Journal: Plant Mol Biol ISSN: 0167-4412 Impact factor: 4.076