الفهرس 
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Abstract
The present study was carried out to evaluate 31 somaclones derived from 4 Egyptian and 2 foreigner bread wheat cultivars (Triticum aestivum L.) at their R8 and R9 generations during 2007- 2011 period in Department of Genetics, Faculty of Agriculture, Minia University, El-Minia, Egypt. The evaluation includes agronomical, cytological and molecular genetic markers.
V. 1. Agronomical traits.
Yield and some yield components were tested i.e. grain yield/plant (g), number of spike/plant, 100-grain weight (g), number of grain/spike, and grain weight/spike (g).
Generally, the obtained results indicated significant differences between parental cultivars and its somaclones for most studied characters. Some somaclones were superior genotypes comparing with their parents and/or other tested genotypes.
S8-17 somaclone had the highest value for all tested agronomic traits (except 100-grain weight) comparing with other 18 S8-derived somaclones and parental cultivate e.g. single plant of S8-17 somaclone produced 68.8 g (in 8th and 9th generation) of grain yield while, Sakha 8 cultivar produced only (65.6 g).
Somaclone S69-4 had the highest value for all yield and yield components (except 100 grain weight) in the 8th and 9th generations comparing with all 4 other somaclones even the parental S69 cultivar, while, S69-3 somaclone give the lowest value for all tested traits.
Among studies 3 somaclones of Spanish wheat Lerma Rojo 64, LR-2 present the highest value for all tested yield and yield components traits even comparing with the parent cultivar LR, in contrast, LR-1 gives the lowest values in both 8th and 9th generations.