الفهرس 
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Abstract
All the interactions among the three factors studied had highly significant effect on all criterion of yield and its components mentioned above which mean the dependent effect for each one of them on these traits in both seasons.
Finally could be concluded that, days to heading of the materials under study was ranged between 76.21 day for K17A and 106.16 day for IR69625A , while , the leaves number was ranged between 13.51 leaves for K17A and 17.38 leaves for IR69625A, moreover , the accumulated temperature was ranged between 1938.68oc for K17A and 2650.08 oc for IR69625A.
As will as , to get good synchronization of flowering should by develop hybrid combinations comparing to, IR69625A / Giza 178R for example, G46A / Giza 178M-4R and K17A / Giza179R on the basis of their total duration and accumulated temperature.