PhD Thesis      [Total: 6 ]

الأنتخاب فى الفول البلدى وتوارث التحمل للهالوك

Tamer El- Marsafawy, 2006


التربية للمحصول والصفات المرتبطة فى الذرة الرفيعة تحت ظروف الإجهاد المائى

Khaled Mahmoud, 2002


Thirty maintainer B-lines and fifty fertility restorer lines (R-lines) were evaluated at Assiut Univ. Exper. Farm and Shandaweel Res. Stn., A.R.C. during the summer seasons of 1998 and 1999 to study there performance under drought stress (three levels of irrigation water; 100, 50 and 30% ET). Six restorers and six A-lines tolerant to drought, and two restorers and two A-susceptible lines were identified after the first season and crossed in 1999 season. The resultant 64 hybrids and its parents along with a check hybrid, Shandaweel-1 were evaluated at the two locations in season 2000 under 100, 50 and 30% ET to identify the high yielding hybrids tolerant to drought stress.
A split-plot in RCBD of two (1998 and 1999 seasons) and three replications (season 2000) was used. Line x tester analysis combined over the three irrigations for each location was performed for season 2000




Tow field experiments were carried out at Sids Agricultural Research Station, Agricultural Research Center during 1996 / 97 and 1997/98 growing seasons to evaluate the two long spike wheat varieties Sids 8 and Sids 10 versus the commercial cultivar Sids 1 .
The three bread wheat genotypes were supplied with 4 N levels (75, 100, 125 and 150 kg / fad.) and were seeded at 3 seeding rates ( 300,350 and 400 seeds / m ² in the first season and 200, 400 and 600 seeds / m ² in the second season. Results showed that.:
• No significant differences were detected in biological yield , grain yield / fad. And harvest index among the three genotypes. However sids 8 outyielded sids 1, and sids 10 in grain yield by 4.8 and 11.9% in the first season, respectively, corresponding to 6.8 and 5.4 % in the second season. The present t results did not show any clear superiority of the long spike genotypes over the commercial cultivar sids 1. the main defect of these genotypes is the few number of spikes / m ² due to their limited tillering capacity.
• Biological yield / fad. significantly increased by increasing N level in 1996 / 97 season , whereas grain yield / fad was not affected.
• LAD from anthesis to ripening increased with increasing seeding rate . On the other hand FLA insignificantly reduced due to increasing seeding rate.

Productivity of some sunflower hybrids by modern systems of irrigation and fertilization under newly reclaimed soil

Esam Osman, 2001


The experiments in this respect were conducted in 1997 and 1998 seasons in El-Ghorieb. Three experiments were carried out in each season representing the systems of irrigation, i.e. surface, sprinkler and drip systems in which every experiment was represented by one system of irrigation. Through each experiment four hybrids, i.e. Pioneer 6480, Vidoc, Phoebus and Bioseed were distributed in the main plots. The spaces within plants, i.e. 20 and 30 cm were in the sub-plots. The results obtained proved that drip irrigation favoured growth traits, yield & yield components, oil percentage, oil yield/feddan, seed moisture percentage, water consumptive use (CU) and water use efficiency (WUE). All the previous traits were affected significantly among the hybrids studied. Spacing of 20 cm within the row produced higher seed yield/feddan. Here the recommended fertigation rate of 30 + 15 + 12.5 kg/feddan for N, P2O5 and K2O, respectively favoured the traits studied

Chemical studies on some genetic resources of wheat, faba bean and peanuts

Eman Mohamed, 1999


The main purpose of this study wasto identify and characterize the various germplasms of wheat, faba bean and peanut using chemical methods. Consequantly, the gross chemical composition, protein fractions, electrophoretic proteins and some isozymes were determine.The gross chemical composition comprised of the following, moisture, crude proteins, lipids, ash, crude fiber, total carbohydrates, soluble sugars, reducing sugars and non-reducing sugars. The protein fractions (albumins, globulins, prolamins and glutelins) were separated dependent upon the proper solvent for each protein fraction (water, salt, alcohol and alkali). The sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS-PAGE) technique was employed to characterize the seed proteins and some isozymes since these components do not affect by the environmental conditions.
The results could be summerized as follow:
1- The data for the gross chemical compositions of various germplasms belonging to wheat, faba bean and peanut can only be used to classify the germplasms of each crop into groups. On the other hand, the data for the gross chemical composition can not be used a basic criterion for germplasm characterization for each crop under study. This finding was achieved because there are overlapping values for a particular chemical composition for the crop germplasms. Some ratios were calculated in order to find a clue for germplasm characterization for each crop such as: carbohydrates/proteins, carbohydrates/ lipids, proteins/ lipids, carbohydrates + proteins/ lipids, carbohydrates + lipids/ proteins and protein + lipids/ proteins. The calculated ratios did not give any indication for germplasms differentiation for the crops under study.
2- Thr crude proteins of various germplasms for each crop were fractionated into 5 fractions, i.e., albumins, globulins, prolamins and glutelins depending upon the solubility in different solvents. Some protein fractions had the same values for certain faba bean germplasms. Therefore, the ratios of globulins / albumins and globulins / prolamins were calculated and the data of these ratios can easily be used to characterize the germplasms belonging to each crop.
3- The seed proteins of various germplasms belonging to faba bean, peanut and wheat were fractionated by SDS-PAGE method. The scanned data of electrophoretic patterns for each protein crop were divided into 3 or 5 distinct regions depending upon the protein molecular weight. It is very difficult to discuss the protein profile for each crop germplasm for varietal differentiation. Hence, the presence or absence of certain bands beside the concentration of each band present in each protein subunit can be used as a criterion of germplasm identification.
4- The bands of four isozymes systems (peroxidase, esterase, glutamate oxaloacetate transferase and 6-phosphogluconate dehydrogenase) were fractionated for the identification of wheat, peanut and faba bean germplasms based on polyacrylamide gel electrophoresis.
Generally speaking, the number of bands, the Rf value of the bands, the absolute concentration of each band and the ratios between certain bands of the isozymes under study can be adequately employed to characterize the various wheat, peanut and faba bean germplasms.

Analysis of diallel cross of some quantitative characters in common wheat (Triticum aestivum L.)

Hassan Ashoush, 1996