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Experimental methods with cotton VI. The determination of staple-length in single plant selections and variety trials

Published online by Cambridge University Press:  27 March 2009

W. L. Fielding
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Summary

1. A study of different methods of staple-length measurement of material from a cotton variety trial, of the comparative accuracy of three persons' measurements and of the number of seeds which it is necessary to measure in order to achieve various degrees of accuracy in the determination of differences in variety trial and single plant material is described.

2. If, in making single plant selections, the breeder is satisfied with a level of significance of P =0·1 when using a sample of only five seeds per plant, he would be justified in discarding material falling one and a half millimetres below the standard of staple-length at which he was aiming.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 38 , Issue 2 , April 1948 , pp. 158 - 162
Copyright
Copyright © Cambridge University Press 1948

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References

REFERENCES

Bailey, M. A. (1930). E.C.G.C. Conference on Cotton Growing Problems, pp. 153, 155Google Scholar
Balls, W. L. (1915). The Development and Properties of Raw Cotton (Black), pl. v.CrossRefGoogle Scholar
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MacDonald, D., Fielding, W. L. & Ruston, D. F. (1939). J. Agric. Sci. 29, 35.CrossRefGoogle Scholar
Turner, A. J. & Underwood, C. (1934). E.C.G.C. Conference on Cotton Growing Problems, p. 290.Google Scholar