الفهرس 
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Abstract
The objective of this investigation is to study the relationship between different newly wheat genotypes and higher response to use biofertilizers plus reducing amounts of mineral nitrogenous manures. Secondly, the effect of biofertilizer on yield and yield components through half diallelic crosses.
Ten locally developed wheat varieties evaluated during the first
season for their response to different nitrogen fertilization treatments. Six of them were chosen according to the results of the first season for more studies under such conditions and to be crossed in all possible combinations without reciprocals to obtain fifteen diallel crosses.
The results revealed that the six parental varieties can be divided into
two categories, first group have high yielding capacity under treatment C including the varieties Giza 164, Gem.l, Sids7 and Sakha 69 and the sconed group including the varieties Gem.3 and Giza 167 With low
yielding capacity under this treatment.
Data from various studies revealed that inoculation with Cerealin (B.
polymyxa) enhanced growth increase in yield components and quality of
protein in wheat grains. The response to inoculation was affected by cultivar, fertilizer and /or biofertilizers.
Results of general combining ability effects indicated that Giza 164,
Gemmeizal and Sids7 could be good combiners for grain yield /plant under the treatment ofbiofertilization (B and C).
The results of specific combining ability effects were matched with results of heterosis under biofertilization treatments (Band C). In general it is obvious that the behavior of parents in cross combinations under biofertilization agreed with its own performance for all characters.
General and specific combining ability effects were frequently significant among parents and hybrids for the studied characters under biofertilization treatments.
These results indicated that some of the parental varieties could be effectively used as promising progenitors for high expression of the
character under consideration and the specific combinations with high performance could be exploited in hybrid production programs
Key words: Wheat- Biofertilizer- Cerealin - Mineral nitrogen fertilizer
- response - varieties - Heterosis- Diallel cross - Combining ability -
yield and yield attributes of wheat