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    Heterosis and combining ability of tropical maize populations

    De la Cruz-Lázaro E1, G Castañón-Najera2, NP Brito-Manzano1, A Gómez-Vázquez1, V Robledo-Torres3, AJ Lozano del Río3

    Phyton-International Journal of Experimental Botany, Vol.79, pp. 11-17, 2010, DOI:10.32604/phyton.2010.79.011

    Abstract Estimation of genetic parameters using diallel crosses experiments aids to objective decision making in plant breeding programs. The objectives of this study were to estimate heterosis, the general combining ability (GCA) of eight tropical maize populations, and the specific combining ability (SCA) of 28 crosses. The populations evaluated were: population 21, 22, 23, 25, 32, 43, 49 and the commercial variety VS 536. The Griffing method 2 design was utilized to estimate GCA and SCA effects, on a complete randomized block design with two replications, at two planting dates. The diallel analysis showed significant differences (p≤0.01 and p≤0.05) among planting… More >

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