Abstract
Gene sequences encoding gibberellin (GA) biosynthetic and catabolic enzymes were isolated from ‘Himalaya’ barley. These genes account for most of the enzymes required for the core pathway of GA biosynthesis as well as for the first major catabolic enzyme. By means of DNA gel blot analysis, we mapped coding sequences to chromosome arms in barley and wheat using barley-wheat chromosome addition lines, nulli-tetrasomic substitution and ditelosomic lines of wheat. These same sequences were used to identify closely related sequences from rice, which were mapped in silico, thereby allowing their syntenic relationship with map locations in barley and wheat to be investigated. Determination of the chromosome arm locations for GA metabolic genes provides a framework for future studies investigating possible identity between GA metabolic genes and dwarfing genes in barley and wheat.
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Acknowledgements
W.S. and M.E. were supported by Graingene—a joint venture between AWB Limited, CSIRO, GRDC and Syngenta Seeds. We thank Lea Hogie, Judy Radik and Carol Harding for excellent technical assistance.
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Communicated by P. Langridge
Wolfgang Spielmeyer and Marc Ellis have contributed equally to this work.
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Spielmeyer, W., Ellis, M., Robertson, M. et al. Isolation of gibberellin metabolic pathway genes from barley and comparative mapping in barley, wheat and rice. Theor Appl Genet 109, 847–855 (2004). https://doi.org/10.1007/s00122-004-1689-6
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DOI: https://doi.org/10.1007/s00122-004-1689-6