Tohumculuk Bölümü Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12514/110

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Dose optimization of foliar applied gibberellic acid for newly developed of hybrid rice lines in Egypt
(Fresenius Environmental Bulletin, 2020) Kızılgeçi, Ferhat; Omar, Abd Elhamid Mohamed; Khalifa, Mohammed Abdelmonem; Elhity, Mahmoud Abdelhamid; Yousef, Mahmoud; Öztürk, Ferhat; Islam, M S; EL Sabagh, Ayman
Gibberellic acid (GA3) plays a vital role in boosting hybrid rice yield, however, fresh research needs to be done for its dose optimization especially for newly developed hybrid rice lines. To fill this research gap, an investigation was conducted at the experimental farm of Sakha Agricultural Research Station, Kafrelsheikh, Egypt during two growing seasons of 2017 and 2018. The main objective of this study was to evaluate the impact of GA3 application on hybrid rice lines for boosting seed production. Egyptian hybrid No.l and G46 A/Giza 178 R were the hybrid rice lines, while GA3 in four doses viz. 0, 250, 300 and 350 g/ha were applied. The experimental design was split plot with three replications, where the main plot was devoted to hybrid rice lines, while the subplots had different doses of GA3. The results showed that the best desirable values for the studied characteristics especially for hybrid seed yield (2.5 t/ha) were recorded of the hybrid combination IR69625/Giza 178 followed by G46A/Gizal78 with the highest dose of GA3. It is concluded that foliage application of GA3@ 350 g/ha has the potential to enhance hybrid rice seed production, while hybrid rice line Giza 178 can be recommended for general adoption in the irrigated regions of Egypt.
Growth and physiological traits of five bread wheat (Triticum aestivum L.) genotypes are influenced by different levels of salinity and drought stress
(Fresenius Environmental Bulletin, 2020) Kızılgeçi, Ferhat; Mokhtari, Negar Ebrahim Pour; Hossain, Akbar
Turgor maintenance through osmotic adjustment can play a vital role in plant tolerance to drought and salinity. As per the evidence of the previous study, chemical polyethylene glycol (PEG) can create physiological drought under both salinity and water deficit conditions. Therefore, PEG is used for forcefully create osmotic stress to find out drought and salinity resistant crop cultivars at the early stage. Considering the essential role of PEG, the current observation was undertaken for understanding the effects of drought and salinity stress on several bread wheat genotypes at early developmental stage particularly during the seedling stage. Five bread wheat genotypes including four varieties such as 'Tekirdag', 'Ceyhan 99', 'Dinc', 'Empire Plus' and a line 'DZ17-1' were used as seed material. To find out the genotypes which are tolerant to drought and salinity, all wheat genotypes were evaluated in four different concentration of NaCl for salinity stress (i.e., 0, 4, 8 and 12 dS/m) and four different concentration of PEG 6000 (i.e., 0, -0.2, -0.4, -0.6 MPa) for drought stress. All treatments were organised in a completely randomized design (CRD) and repeated three times. After observation, it is revealed that bread wheat cultivars 'Dinc' and 'Ceyhan 99' were found tolerant of both drought and salinity stress at the seedling stage. The study also noticed that understanding of seedlings growth such as mean germination time (MGT), coleoptile length, seedling height, root length and relative water content (RWC) allow the selection of genotypes tolerance to drought and salinity. The information from the study will be helpful for examination of wheat genotypes which are suitable to cultivate under osmotic stress of both drought and salinity stress condition.

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