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Patterns of yield production in two semi-dwarf and two conventional height European spring wheats

Published online by Cambridge University Press:  27 March 2009

W. J. Angus  and
G. C. M. Sage
W. J. Angus
Affiliation:
Plant Breeding Institute, Marts Lane, Trumpington, Cambridge CB2 2LQ
G. C. M. Sage
Affiliation:
Plant Breeding Institute, Marts Lane, Trumpington, Cambridge CB2 2LQ
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Summary

Two semi-dwarf and two conventional height European spring wheat varieties were grown at different sowing dates and sowing rates in two dry years. Yield component analysis showed the varieties to fall into three groups. The conventional height varieties were dependent for grain yield on either a high number of ears or a large number of spikelets per ear whereas the semi-dwarfs were dependent on high spikelet fertility.

The semi-dwarfs were consistently higher yielding over a range of environmental conditions than the conventional height varieties. Maintenance of high yield was associated with high spikelet fertility and 1000-grain weight, characters determined late in development. It is suggested that the change to the semi-dwarf plant type has resulted in high yields with greater consistency over a range of environmental conditions particularly when dry.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 95 , Issue 2 , October 1980 , pp. 387 - 393
Copyright
Copyright © Cambridge University Press 1980

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