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The Physiology of Grain Yield in Wheat in an Irrigated Tropical Environment

Published online by Cambridge University Press:  03 October 2008

H. M. Ishag
Affiliation:
Agricultural Research Corporation, PO Box 126, Wad Medani, Sudan
O. A. A. Ageeb
Affiliation:
Agricultural Research Corporation, PO Box 126, Wad Medani, Sudan

Summary

The potential yield of wheat and the physiological basis of yield limitation in the lowland irrigated tropics was investigated in three cultivars planted at five sowing dates. Maximum grain yields were achieved by cultivars that flowered in January when the weather was coolest. The period from sowing to terminal spikelet initiation was similar for all varieties and all sowing treatments. The period from terminal spikelet initiation to ear emergence was increased when seed was sown in late November or early December rather than in October or early November. Manipulation of the sowing date in relation to the choice of cultivar had a considerable effect on grain yield.

H. M. Ishag and O. A. A. Ageeb: Rendimiento del trigo en las zonas tropicales.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1991

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References

REFERENCES

Davidson, H. R. & Campbell, C. A. (1983). The effect of temperature, moisture and nitrogen on the rate of development of spring wheat as measured by degree days. Canadian Journal of Plant Science 63:833846.CrossRefGoogle Scholar
Finlay, K. W. & Wilkinson, G. N. (1963). The analysis of adaptation in a plant breeding programme. Australian Journal of Agricultural Research 14:742754.CrossRefGoogle Scholar
Fischer, R. A. (1985). Physiological limitations to producing wheat in semi-tropical and tropical environments and possible selection criteria. In: Wheat for More Tropical Environments. Proceedings of International Symposium, CIMMYT, Mexico, 1985, 209230. Mexico: CIMMYT.Google Scholar
Khalifa, M. A. (1970). Effect of sowing date, nitrogen and seed rate on wheat yields in the Sudan Gezira. Experimental Agriculture 6:143149.CrossRefGoogle Scholar
Midmore, D. J. (1976). Growth, development and yield of wheat (Triticum aestisum L.) in the tropics. PhD thesis, University of Reading, England.Google Scholar
Owen, P. C. (1971). Responses of a semi-dwarf wheat to temperatures representing a tropical dry season II. Extreme temperatures. Experimental Agriculture 7:4347.CrossRefGoogle Scholar