Physiological Growth Attributes of Saccharum Clones and their Progenies

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Abstract
Characters obtained by growth analysis techniques were studied in seven sugar-cane clones and their seedling progenies from a ratton crop 139 days after virgin harvest. Significant differences in progeny means for Rwand EAwere mainly accounted for by differences in L. Four select clones had a mean Rw and mean EA which, when adjusted to allow for their superior L, were significantly greater than average (P< 0.05). This illustrated that for selection to be effective from the progenies, segregants with improved L and better leaf-area dependence must be isolated. The estimates obtained of both L and EA were effective in predicting final weight of cane. Variance components indicated especially large ‘male X female’ interaction in progeny means. Some evidence was obtained to suggest that leaf-area ration is a character which could be used in selecting small plots for weight.

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