Abstract
We have developed an efficient transformation system for red raspberry (Rubus ideaus L.) using Agrobacterium mediated gene transfer. Using this system we have successfully introduced a gene that encodes an enzyme, S-adenosylmethionine hydrolase (SAMase), in raspberry cultivars Meeker (MK), Chilliwack (CH) and Canby (CY). Leaf and petiole expiants were inoculated with disarmed Agrobacterium tumefaciens strain EHA 105 carrying either of two binary vectors, pAG1452 or pAG1552, encoding gene sequences for SAMase under the control of the wound and fruit specific tomato E4 promoter. Primary shoot regenerants on selection medium were chimeral containing both transformed and non-transformed cells. Non-chimeral transgenic clones were developed by iterative culture of petiole, node and leaf explants, on selection medium, from successive generations of shoots derived from the primary regenerants. Percent recovery of transformants was higher with the selection marker gene hygromycin phosphotransferase (hpt), than with neomycin phosphotransferase (nptII). Transformation frequencies of 49.6%, 0.9% and 8.1% were obtained in cultivars Meeker, Chilliwack and Canby respectively from petiole expiants using hygromycin selection. Genomic integration of transgenes was confirmed by Southern hybridization. Transgenic plants from a total of 218 independent transformation events (161 MK, 4 CH, 53 CY) have been successfully established in soil.
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Abbreviations
- ACCO:
-
amincocyclopropane-1-carboxylic acid oxidase
- AS:
-
acetosyringone
- BA:
-
6-benzylaminopurine
- CH:
-
cultivar Chilliwack
- CY:
-
cultivar Canby
- cv:
-
cultivar
- hpt :
-
hygromycin phosphotransferase
- IBA:
-
indolebutyric acid
- MK:
-
cultivar Meeker
- npt II :
-
neomycin phosphotransferase
- SAMase:
-
S-adenosylmethionine hydrolase
- TDZ:
-
Thidiazuron (N-phenyl-N'-l,2,3-thidiazol-5-ylurea)
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Communicated by I. K. Vasil
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Mathews, H., Wagoner, W., Cohen, C. et al. Efficient genetic transformation of red raspberry, Rubus ideaus L.. Plant Cell Reports 14, 471–476 (1995). https://doi.org/10.1007/BF00232777
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DOI: https://doi.org/10.1007/BF00232777