Journal of Taiwan Agricultural Research

Author:Shao-Kuo Liu and Guang-Jauh Shieh*

Abstract:

    A feld experiment was conducted during 2007 to determine combining ability of fresh ear weight and sugar content in F₁ hybrids of super-sweet corn.  Cross were made using four inbred lines of tropi-cal type and fve inbred lines of temperate type to produce 36 F₁ hybrids for testing in the feld to com-pare fresh ear yield (with husk) and sugar content by analysis of a half diallel set.  Results showed that the fresh ear weight with husk was higher in hybrids of tropical type × tropical type and tropical type ×  temperate type than in hybrids of temperate type × temperate type.  There was no signifcant differ-ence (P > 0.05) in sugar content among hybrids of tropical type × tropical type and tropical type × temperate type.  In general, the tropical inbred lines had more positive genes for the fresh ear weight, and the temperate inbred lines generally had more positive genes for sugar content.  Therefore, pro-duction of hybrids by tropical type inbreds and temperate type of inbreds is a promissing strategy for breeding super sweet corn.

Key words:Super sweet corn, Tropical type, Temperate type, Heterotic pattern, Combining ability

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