الفهرس 
Chapter 1 : Introduction and Review of LiteratureOnly 14 pages are availabe for public view
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Abstract
The first main experiment focused on studying and evaluating the genetic parameters in two different sweet-field corn crosses using the generation mean analysis for kernels content of total soluble solids (TSS) and their color. The F1, F2, BC1P1 and BC1P2 were produced from cross No 1 (Country Gentleman ”P1” X the yellow field corn inbred 2605-1288Y”P2”) and cross No 2 (white field corn inbred 82 ”P1” X Golden Bantam ”P2”). The sweet corn cultivars showed the highest TSS contents compared with the field corn inbreds. However, the F1 means in both crosses were higher than mid parent’s values, but did not exceed those of their high parent suggesting the existence of the partial dominance. Furthermore, values of A, B and C of the scaling test were significant confirming the existence of non-allelic gene interaction. At the same time, broad and narrow sense heritability values were higher in cross No 1 than that of cross No 2 and this increase the possibility of selection for high TSS contents in the studied materials. Additive and dominance gene effects of the TSS values were significant and their values had similar or opposite signs In conclusion, sweet-field corn hybrids could be produced successfully under El-Minia growing conditions. Our inbreds could be considered promising parents for heterosis breeding program in sweet corn. Five hybrids could be released after taking the official permission. Also, to fortified sweet-filed corn, special breeding techniques should be followed.