Summary
Genetic analysis of a new weak source of GA-insensitivity derived from Saitama 27 showed that it was controlled by a single gene located on chromosome 4A and allelic to Rht1 and Rht3. the gene was shown to be present in many Italian and Yugoslavian varieties suggesting a selective advantage in some breeding programmes. Varietal comparisons indicated that the gene reduces height by around 11 per cent. This was combined with an increase in spikelet fertility and in the total number of grain developing in the ear. In this initial experiment a reduction in grain size eliminated the advantages of increased grain number. Following development of isogenic lines in a number of varietal backgrounds the true potential of the gene will be determined.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Allan R.E., 1980. Influence of semi-dwarfism and genetic background on stand establishment of wheat. Crop Sci 20: 634–638.
Boggini G., 1978. Uno squardo all'evoluzione varietale del frumento. L'Informatore Agrario XXXIV (44): 3503–3508.
Flintham J.E. & M.D. Gale, 1983. The Tom Thumb dwarfing gene Rht3 in wheat. II. Effects on height, yield and grain quality. Theor and Appl Genet 66: 249–256.
Gale, M.D., 1979. The effects of the Norin 10 dwarfing genes on yield in wheat. Proc Fifth Int Wheat Gen Symp, Indian Soc Gen Plant Breeding, New Delhi: 978–987.
Gale, M.D., 1984. The role and potential of dwarfing genes in wheat. Proc Int Symp on New Gen Approaches to Crop Improvement, Karachi, Pakistan, pp 655–674.
Gale, M.D., 1987. Cereals Research Communication (in preparation).
Gale M.D. & G.A. Marshall, 1973. Insensitivity to gibberellin in dwarf wheats. Annals of Botany 37: 729–735.
Gale M.D. & G.A. Marshall, 1975. The nature and genetic control of gibberellic insensitivity in dwarf wheat grain. Heredity 35: 55–65.
Gale M.D. & S. Youssefian, 1985. Dwarfing genes in wheat. 1. In: G.E. Russell (Ed.), Progress in Plant Breeding, pp 1–35 Butterworths, London.
Izumi N., S. Sawada & T. Sasakuma, 1981. A dominant gene of dwarfism located on chromosome 4D in Triticum aestivum cv. ‘Ai-bain 1’. Wheat Inf Service 53: 21–24.
Law C.N., J.W. Snape & A.J. Worland, 1978. The genetical relationship between height and yield in wheat. Heredity 40: 133–151.
Law, C.N., J.W. Snape & A.J. Worland, 1981. Intraspecific chromosome manipulation. In: The Manipulation of Genetic Systems in Plant Breeding: Royal Society Discussion, 1980, B.292, pp 509–518.
Law C.N. & A.J. Worland, 1985. An effect of temperature on the fertility of wheats containing the dwarfing genes Rht1, Rht2 and Rht3. Annual Rep Plant Breeding Inst 1984: 69–71.
Worland A.J., 1986. Gibberellic acid insensitive dwarfing genes in Southern European wheats. Euphytica 35: 857–866.
Worland A.J. & C.N. Law, 1985. Aneuploids in semi-dwarf wheat varieties. Euphytica 34: 317–327.
Zeven A.C., 1969. Tom Pouce Blanc and Tom Pouce Barbu Rouge, two Triticum aestivum sources of very short straw. Wheat Inf Service 29: 8–9.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Worland, A.J., Petrovic, S. The gibberellic acid insensitive dwarfing gene from the wheat variety Saitama 27. Euphytica 38, 55–63 (1988). https://doi.org/10.1007/BF00024811
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00024811