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Comparisons of the Performance of Sugar-cane Varieties in Trials and in Agriculture

  • D. I. T. Walker (a1) and N. W. Simmonds (a1)

Summary

Twelve varieties of sugar-cane grown in Barbados, West Indies, during the past 40 years are compared with respect to cane yield performance in trials and in agriculture. Comparisons are based on data-pairs matched for site, season and crop, using both means and variety-on-variety regressions. Conclusions are that: trials greatly over-estimate mean agricultural differences between varieties; variety-on-variety regressions reveal numerous GE effects and account for much variance, but agree poorly as between trials and agriculture and are not useful in improving prediction; in view of the universal use of trials for prediction and decision-making, it is a matter of some practical importance that their validity should be tested in other crops.

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Simmonds, N. W. (1979b). The impact of plant breeding on sugar-cane yields in Barbados. Tropical Agriculture, Trinidad 56:289300.
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Various authors (19361977).The Yields of Sugar Cane in Barbados. Department (later Ministry) of Agriculture, Barbados.

Comparisons of the Performance of Sugar-cane Varieties in Trials and in Agriculture

  • D. I. T. Walker (a1) and N. W. Simmonds (a1)

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