Journal of Taiwan Agricultural Research

Author:Shao-Kuo Liu, Guang-Jauh Shieh*, and Fu-Sheng Thseng

Abstract:

    A half set of diallel crosses of three tropical and eleven temperate varieties of maize was studied in this study.  Data of 91 crosses were analyzed by Griffing’s methodⅠand mode Ⅵ.  Fourteen traits, including days to tasseling, days to silking, plant height, ear height, total leaf number, ear leaf length, ear leaf width, leaf area per plant, ear fresh weight, ear length, ear diameter, row number, bite test and sugar content were investigated.  The results were summarized as follows: the plant height, leaf area per plant, total leaf number, ear leaf length and ear leaf width of tropical × tropical crosseshad more than those of temperate × tropical or temperate × temperate crosses, and also temperate × tropical crosses had more than those of temperate × temperate.  The ear fresh weight of the tropical × tropical and tropical × temperate crosses had higher yield than those of temperate × temperate, and non-significant difference was found between crosses of tropical × tropical and temperate × temperate.  There are 16 crossed hybrides of temperate × temperate, and 6 crossed hybrids of temperate × tropical having sugar content over 15 Brixo .  Significant general combining abilities were found in the fresh ear weight and vegetable traits.  The tropical type had positive effect and temperate type had negative effect of combining ability in yield and vegetable traits; but they had opposite result in sugar content.

Key words:Super sweet maize, Tropical, Temperate, Heterotic pattern, General combining ability

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