Euphytica

, Volume 27, Issue 2, pp 629–643

Efficiency of border rows in replicated sugar cane variety trials

  • J. C. Skinner
  • D. M. Hogarth
Article

Summary

Each row was weighed separately in 34 sugar-cane variety trials harvested from 1973 to 1976. The efficiency of weighing only the middle row(s) compared with the whole plot was estimated by calculating coefficients of variation and theoretical gains from selection.

It was not efficient to weigh only the middle row in trials with 3-row plots. Gain from selection for true yield (that is, yield in the absence of competition from other varieties) was reduced by 7% and the coefficient of variation increased by 4%, this representing an increase of about 33% in the variability of the trials.

It was efficient to weigh only the middle two rows of 4-row plots, especially for trials on commercial farms. This gave a 2% increase in gain from selection and the coefficient of variation was increased by only 0.9%. It reduces the weighing time and amount of cane weighed, minimizing the delay to commercial harvesting while trials are being weighed.

On Experiment Stations where land is a limiting factor, the most efficient method is to continue the present practice of planting 3-row plots and weighing the whole plots.

Index words

Saccharum officinarum sugar cane border rows coefficient of variation 

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References

  1. Barnard, A. E. & J. C., Skinner, 1974. A weighing machine for mechanically harvested trials. Int. Soc. Sugar Cane Tech. Sugar Cane Breeders' Newsletter 34: 4–9.Google Scholar
  2. Falconer, D. S., 1960. Introduction to quantitative genetics. London, Oliver & Boyd. p. 192–194.Google Scholar
  3. Hogarth, D. M., 1969. A note on the analysis of variance of variety trials. Int. Soc. Sugar Cane Tech. Sugar Cane Breeders' Newsletter 23: 35–40.Google Scholar
  4. Hogarth, D. M. & J. C. Skinner, 1967. A sampling method for measuring yields of sugar cane in replicated trials. Bur. Sug. Exp. Sta. Q. Tech. Comm. 1967, No. 1Google Scholar
  5. Skinner, J. C., 1961. Sugar cane selection experiments 2. Competition between varieties. Bur. Sug. Exp. Sta. Q. Tech. Comm. 1961, No. 1Google Scholar
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Copyright information

© H. Veenman En Zonen B.V. 1978

Authors and Affiliations

  • J. C. Skinner
    • 1
  • D. M. Hogarth
    • 1
  1. 1.Bureau of Sugar Experiment StationsBrisbaneAustralia

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