الفهرس 
1. INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
In present study tissue culture was used as powerful technology to predict heterosis and combining ability in different wheat genotypes. Heterosis and combining ability studies were performed for number of spikelets per spike, spike length, spike weight, spike density, number of grains per spike, grain yield per plant, 1000-grain weight, callus growth rate, callus induction ability, relative growth rate, callus fresh weight, callus dry weight and callus water content traits in a half-diallel cross involving six Egyptian bread wheat genotypes and its 15 F1 hybrids. Mean squares of genotypes were found to be significant for most agronomic and tissue culture studied traits. Both general and specific combining ability (GCA and SCA) variances were found to be significant for most agronomic and studied tissue culture traits. The GCA/SCA ratios were found to be more than unity for most agronomic and tissue culture traits. Cultivar Gemmiza 9 was considered to be good general combiner for most traits. Information generated from this study can be useful to predict hybrid for selecting parents and hybrid development to maximize the grain yield and its components in wheat.