Genetical analysis of diallel crosses in maize (Zea mays L.) over Two years [electronic resource].

Includes references.

This work was undertaken during three successive seasons to evaluate combining ability and heterosis for 8 inbred lines of maize. A half dialleI crosses among 8 new developed inbred lines (If maize (Zea mays L.) were evaluated for nine quantitative characters. Year mean squares were significant for all traits except for ear length. Hybrid mean squares were significant for all traits in the two growing seasons as well as the combined data. Significant hybrids by years mean squares were detected for all studied characters except for no. of kernels/row and shelling %. Mean squares associated with general and specific combining ability in combined data were significant for all traits. Also. high G.C.A.lS.C.A ratios which largely exceeded the unity were obtained for ear length, ear diameter, "no. of rows/ear. tOO-kernel weight and grain yield/plant in combined analysis. Significant interactions mean square between years and general combining ability was detected for all traits except for ear height, ear diameter and grain yield/plant. Whereas, significant interaction mean squares between years and S.c.A. were obtained for plant and ear heights, ear diameter, 110. of rows/ear and grain yield/plant.

Summary in Arabic.

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