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  1. Vol. 22 No. 6, p. 1179-1184
     
    Received: Nov 30, 1981
    Published: Nov, 1982


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doi:10.2135/cropsci1982.0011183X002200060022x

Phenotypic Stability Analyses of Sugarcane Cultivar Performance Tests1

  1. P.Y.P. Tai2,
  2. E.R. Rice2,
  3. V. Chew3 and
  4. J.D. Miller2

Abstract

Abstract

Estimation of the magnitude of cultivar-environment interaction will provide information for developing more precise methods of selection. Cultivar trials of sugarcane (a complex interspecific hybrid of Saccharum spp.) in Florida were studied for cultivar × environment interaction and evaluated for the phenotypic stability by measuring regression coefficients (b) and mean square deviations from regression (S2d. Stalk weight, Brix, percent sucrose, percent purity, kilogram of sugar per metric ton of cane (S/T), metric tons of cane per hectare (TCH), and metric tons of sugar per hectare (TSH) were studied, with emphasis on Brix, S/T, TCH, and TSH. The variance component estimates for cultivars, cultivars × locations, cultivars × years were significantly different from zero. Linear regression analyses indicate that the current check did not have good stability for TCH and TSH and was not a stable standard for evaluating new selections. This analysis also demonstrated that some selections were superior to the check in TCH and TSH. However, for the three most important characters (S/T, TCH and TSH), none of the 10 selections ranked at the top for mean performance with good stability. This study suggests that stability analysis can provide supplementary information on the performance of new sugarcane selections prior to release for commercial cultivation and increase the efficiency of cultivar development programs.

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