Journal of Taiwan Agricultural Research

Author:Guang-Jauh Shieh

Abstract:

    A half-diallel crosses were made from 13 maize (Zea mays L.) inbred lines selected from 8 different Tainan-white (TNW) populations.  They were used to investigate the kernel weight and pericarp characters. Results from Hayman's analysis indicated that the additive gene effect and non-additive gene effect (dominance effect) were significant for all the investigated pericarp characters.  The additive effect was larger than the dominance effect for all the pericarp characters.  The h²/H₂ values were ranged from 1.62 to 6.09 for the pericarp characters indicating that the traits were controlled by 2–7 gene groups.  The kernel weight controlled by seven groups of dominant gene, and the dominant gene expressed with increasing kernel weight, and their narrow-sense heritability were 0.45.  The pericarp thickness characters controlled by 2–5 groups of dominant gene, and the dominant gene expressed with decreasing pericarp percentage, and their narrow-sense heritabilities were ranged from 0.67 to 0.76.  The inbred lines of TNW-B and TNW-3 with more dominant genes for the pericarp characters will be selected.

Key words:Maize, Tainan-white, Pericarp thickness, Gene effect

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