All X 9 dlallel rombining ability analysis showed the predominant role of nonadditive type of gene
action in the inheritance of grain yield, ear diameter and 1000.kernel weight. Ear length, kernel
rows per ear and kernels per row indicated equal importance of both additive and nonadditive
genes. Greater importanre of gra x environment (E) interadion, than ofsra x E interadion, was
revealed for ear length and diameter, while only sca x E was important for kernel rows per ear
and 1000·kernel weight. G x E interariion was of no importanre for grain yield and kernels per
row. Two inbreds (P7 and P9) and two crosses (P2 x P8 and P4 x P7) exhibited signifirant and
positive gra and sra efFeds, respedively, for grain yield and some of its attributes.
Keywords: Zea mays, maize, combining ability.
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
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