الفهرس 
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Abstract
Ahmad EI-Sayed Atia, Sugar beet (Beta vulgaris, L) seed production and its viability in Egypt. Unpublished master of Science Thesis, Agronomy Department, Fac. of Agric., Ain Shams Univ., 2000.
The present investigation was carried out in faculty of Agriculture
experimental farm, Ain Shams University, Shoubra EI-Khaima-Kaliobia Governorate during the period from 1997 to 1999 to study the effect of vernalization, gibberellic acid (GA3) and root weight on sugar beet flower induction and seed setting under Egyptian conditions and to evaluate the produced seeds as compared with its mother variety H-Poly1. The obtained results showed that only roots which exposed to low temperature (vernalization) successfully produced seeds in both experimental seasons while unvernalized roots failed to produce flower. Both flowering and seed setting percentages were increased with prolonging photo-period in both seasons up to 18h/d. Big vernalized stickling weight (>1000 g) exposed to the longest selected photo-period (18h/d) gave the highest values of flowering plants percentage (86.3% and 91.7%) and total seed yield (260.8 kg /fed and 289.36 kg/fed)) in both seasons respectively, and seed setting (100%) in the second season only. Spraying sugar beet plants with 1000 ppm GA 3 gave the
lowest mean no. of days from replanting to flowering (47.77 and 44.08
days), the highest flowering plants percentage (29.18% and 29.70%) and seed setting percentage (28.02% and 29.47%) in both experimental seasons, respectively. The highest seed setting percentage was obtained from vernalized roots of more than 1OOOg and received 1OOOppm GA 3 in both seasons (64.7 and 62.2%, resp.).The produced seeds were collected from each treatment and were subjected to an evaluation study. Results showed that the highest germination percentage (87.50%) was
obtained from seed produced on vernalized roots of 500-1OOOg and exposed to 14h/d photoperiod as compared by mother variety seed.