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Yield characters of selected oat varieties in relation to cereal breeding technique1

Published online by Cambridge University Press:  27 March 2009

S. G. Stephens
S. G. Stephens
Affiliation:
Formerly Scottish Society for Research in Plant Breeding, Edinburgh, Now Empire Cotton Growing Corporation, Cotton Research Station, Trinidad, British West Indies
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Extract

1. Results obtained from two seasons' population studies of selected spring oat varieties in Scotland indicated that extent of tillering had little or no effect on yield. These results are in sharp contrast with those obtained by workers with wheat.

2. The yield of individual plants under the conditions of the experiments became adjusted to differences in population density primarily by variation in number of grains per panicle. Spikelet weight tended to be negatively correlated both with population density (external competition) and with number of grains per panicle (intrapanicle competition). These factors tended to neutralize each other.

3. The decrease in size of additional grains in spikelets with more than one grain was balanced by increased weight of the basal grains as compared with the weight of a single grained spikelet. Average grain weight per spikelet therefore tends to remain constant.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 32 , Issue 2 , April 1942 , pp. 217 - 254
Copyright
Copyright © Cambridge University Press 1942

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