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Interrelationships between stem and ear development in winter wheat: the effects of a Norin 10 dwarfing gene, Gai/Rht2

Published online by Cambridge University Press:  27 March 2009

I. R. Brooking  and
E. J. M. Kirby
I. R. Brooking
Affiliation:
Plant Breeding Institute, Trumpington, Cambridge, CB2 2LQ
E. J. M. Kirby
Affiliation:
Plant Breeding Institute, Trumpington, Cambridge, CB2 2LQ
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Summary

A field and a glasshouse experiment were carried out to assess in winter wheat genotypes the interrelationships between stem and ear development, and to relate these to number of grains and yield. Capelle-Desprez (gai/rht2) and Hobbit ‘s’ (Gai/Rht2) were used together with four F4 lines from the cross between them. Two of the lines were homozygous for gai/rht2 and two lines homozygous for Gai/Rht2. Within each pair of homozygous lines there was a contrast between a tall and a short genotype.

There were no consistent differences in shoot apex morphogenesis between the genotypes, and, in general, similar numbers of spikelets and floret primordia were initiated in all genotypes. This contrasts with the hypothesis that genotypes based on Norin 10 (Gai/Rht2) have a fundamentally different pattern of ear morphogenesis. The main differences between genotypes were in dry-matter partitioning to stem and ear prior to anthesis and these were associated more consistently with the dwarfing gene than with height per se. Gai/Rht2 genotypes partitioned more dry matter to the ear during its development and less to the stem and this was reflected in greater ear weight at anthesis, more fertile florets and grains per spikelet, a higher harvest index and higher grain yield than the gai/rht2 genotypes. Although similar numbers of floret primordia were initiated in all genotypes, assimilate partitioning during development determined the proportion which developed into fertile florets at anthesis.

Information

Type
Research Article
Information
The Journal of Agricultural Science , Volume 97 , Issue 2 , October 1981 , pp. 373 - 381
Copyright
Copyright © Cambridge University Press 1981

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References

Anon. (1969). Tables for the evaluation of daily values of accumulated temperature from daily values of maximum and minimum temperatures. Form 3300, Meteorological Office, London.Google Scholar
Bingham, J. (1972). Physiological objectives in breeding for grain yield in wheat. Proceedings of the 6th Eucarpia Congress, Cambridge 1971, pp. 15–29.Google Scholar
Ephrat, J. (1974). Some ideas about wheat breedng for higher yields after the ‘Green Revolution’ break through. Zeitschrift fur Pflanzenzüchtung 72, 39–45.Google Scholar
Fisher, J. E. (1973). Developmental morphology of the inflorescence in hexaploid wheat cultivars with and without the oultivar Norin 10 in their ancestry. Canadian Journal of Plant Science 53, 7–15.CrossRefGoogle Scholar
Gale, M. D. (1978). The effects of Norin 10 dwarfing genes on yield. Proceedings of the 5th International Genetics Symposium, New Delhi, pp. 978–987.Google Scholar
Gale, M. D. & Marshall, G. A. (1978). A classification of the Norin 10 and Tom Thumb dwarfing genes in hexaploid bread wheat. Proceedings of the 5th International Wheat Genetics Symposium, New Delhi, pp. 995–1001.Google Scholar
Holmes, D. P. (1973). Inflorescence development of semi-dwarf and standard height wheat cultivars in different photo-period and nitrogen treatments. Canadian Journal of Botany 51, 941–956.CrossRefGoogle Scholar
Jain, H. K. & Kulshrestha, V. P. (1976). Dwarfing genes and breeding for yield in bread wheat. Zeitschrift für Pflanzenzüchtung 76, 102–112.Google Scholar
Kirby, E. J. M. (1974). Ear development in spring wheat. Journal of Agricultural Science, Cambridge 82, 437–447.CrossRefGoogle Scholar
Kirby, E. J. M. (1977). The growth of the shoot apex and the apical dome of barley during ear initiation. Annals of Botany 41, 1297–1308.CrossRefGoogle Scholar
Krull, C. F. & Borlaug, N. E. (1970). The utilization of collections in plant breeding and production. In Genetic Resources in Plants (ed. Frankel, O. H. and Bennet, E.), pp. 427–439. Oxford: Blackwell Scientific.Google Scholar
Langer, R. H. M. & HANIP, M. (1973). A study of floret development in wheat (Triticum aestivum L.). Annals of Botany 37, 743–751.CrossRefGoogle Scholar
Law, C. N., Snape, J. W. & Worland, A. J. (1978). The genetical relationship between height and yield in wheat. Heredity 40, 133–151.CrossRefGoogle Scholar
Lupton, F. G. H., Oliver, R. H. & Ruckenbauer, P. (1974). An analysis of the factors determining yields in crosses between semi-dwarf and taller wheat varieties. Journal of Agricultural Science, Cambridge 82, 483–496.CrossRefGoogle Scholar
Patrick, J. W. (1972). Distribution of assimilate during stem elongation in wheat. Australian Journal of Biological Sciences 25, 455–467.CrossRefGoogle Scholar
Pearman, I., Thomas, S. M. & Thorne, G. N. (1978). Effect of nitrogen fertilizer on growth and yield of semi-dwarf and tall varieties of winter wheat. Journal of Agricultural Science, Cambridge 91, 31–45.CrossRefGoogle Scholar
Rawson, H. M. (1970). Spikelet number, its control and relation to yield per ear in wheat. Australian Journal of Biological Sciences 23, 1–15.CrossRefGoogle Scholar
Rawson, H. M. & Bagga, A. K. (1979). Influence of temperature between floral initiation and flag leaf emergence on grain number in wheat. Australian Journal of Plant Physiology 6, 391–400.Google Scholar
Sunderland, N. & Brown, R. (1956). Distribution of growth in the apical region of the shoot of Lupinus albus. Journal of Experimental Botany 7, 126–145.Google Scholar
Syme, J. R. (1969). A comparison of semi-dwarf and standard height wheat varieties at two levels of water supply. Australian Journal of Experimental Agriculture and Animal Husbandry 9, 528–531.CrossRefGoogle Scholar
Syme, J. R. (1970). A high-yielding Mexican semidwarf wheat and the relationship of yield to harvest index and other varietal characteristics. Australian Journal of Experimental Agriculture and Animal Husbandry 10, 350–353.CrossRefGoogle Scholar
Wabdlaw, I. F. (1968). The control and pattern of movement of carbohydrates in plants. Botanical Review 34, 79–105.CrossRefGoogle Scholar