الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
Two field experiments were conducted at the Experimental Research Center, Faculty of Agriculture Moshtohor, Zagazig University (Benha Branch), Kaluibia Governorate during 1999 and 2000 growing seasons to evaluate ten new maize hybrids and study the association between yield and other related characters. in maize in both seasons.
The tested new hybrids included six single crosses namely, Moshtohor-8 (M 8) x M 199, M 8 x M 200, M 46 x M 210, M 234x M 56, M 183x M 199 and M 8x M201 and four three- way crosses (M 210 x S.C. 10, M 373 x S.C. 10, M 344 x S.C. 10) and M 360 x S.C. 10). The parental inbred lines of these hybrids were developed in the maize breeding program at the Faculty of Agriculture, Moshtohor, Zagazig University (Bertha Branch). The three check varieties used in this investigation were : S.C. 10, T.W.C. 310 and Giza-2 which were developed by the Maize Research Section of the Agricultural Research Center, Giza Egypt. The experimental design was Complete Randomized Block Design with four replications in both seasons. Data recorded on date of silking, plant height (cm), ear height (cm), ear length (cm), ear diameter (mm), number of rows/ ear, number of kernels/ row, 100-kernel weight, shelling percentage, grain yield (g/ plant) and grain yield (kg/ fad). Data were analyzed separately for each season and combined analysis over both seasons according to (Steel and Torrie, 1960). The simple correlation coefficient
matrix between grain yield/ plant and other studied traits was estimated according, to Snedecor and Cochran (1981). Correlation coefficients were used to calculate path coefficients. Path coefficient analysis as suggested by Dewey and Lu (1959) was used to estimate the relative importance of characters contributing to yield. Factor Analysis was used to establish the
dependence relationship between all studied variables (Cattell, 1965).
The obtained results could be summarized as follows : Analysis of variance and mean performance :
1-Significant season mean squares were obtained for ear height, ear length, ear diameter, number of grains/ row, grain yield/ plant and grain yield kg/ fad.
2-Highly significant genotypes mean squares were detected
for all traits in separate season as well as the combined analysis.
3-- Two hybrids namely M 210 x SC 10 were significant earlier
than the other genotypes recording 62.88 and 62.75 days, respectively.
4-Two genotypes namely, M 46 x M 210 (247.1 cm), M 8 x
M 201 (248.0 cm) were significantly shorter than all genotypes under study .
5-Three genotypes had the shortest ear position with significant difference as compared with the three check varieties in both seasons and their combined data.