Effect of Seeding Rate and Ga3 Application on Hybrid Rice Seed Productivity under Seed Production Plots | ||||
| Alexandria Science Exchange Journal | ||||
| Article 3, Volume 31, APRIL- JUNE - Serial Number 2, April 2010, Page 155-162 PDF (496.57 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/asejaiqjsae.2010.2307 | ||||
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| Authors | ||||
| El-Degwy I.S.* 1; M.I. Abo-Youssef* 2; A.A. Mohamed* 1; M.A. Al-Shenawey* 2 | ||||
| 1Agronomy Department Faculty of Agriculture, Kafrelsheikh University, Egypt. | ||||
| 2Rice Research and Training Center, Sakha, Kafrelsheikh, Egypt | ||||
| Abstract | ||||
| Two field experiments were carried out at the Experimental Farm of Sakha Agricultural Research Station, Kafr El–Sheikh Governorate, Egypt, during the two successive summer seasons of 2007 and 2008.The field experiments were conducted to study the effect of seeding rate and GA3 doses in the hybrid rice seed production plots on growth characters, yield and its components of F1 hybrid rice plants. The material under this study included the parental lines IR 69625 A as (female line) and Giza 182 (restorer line) to produce the seeds of F1 hybrid rice (SK 2058 H). A split-plot design with three replication was used. The main plot was devoted to seeding rate of 20, 24and 28 kg seeds/ha, while the GA3 doses were assigned in the sub plots. Four doses of GA3 (BERLEX) 300, 350, 400 g/ha and a control treatment (spraying with water) in two spraying times. The results showed that, Plant height and flag leaf angle were highly significantly affected by the different doses of GA3 and different seeding rate. The female parent of the hybrid, SK 2058 H, had a wide variation for panicle exsertion. The hybrid seed yield was highly significantly affected by GA3 application. It was increased by using 300g GA3/ha, indicating the positive effect of application. The1000-grain weight was decreased with increasing the doses of GA3 while the application of high doses of GA3 increased the seed set percentage, but reduced the grain filling rate. The grain yield of the IR69625A was highly affected by the seeding rate and GA3 applications. Results also showed that using 20 or 24 kg seeds/ha from IR69625A and GA3 application by the rate of 350 g/ha may be the best combination for hybrid rice seed production. ased with the progress of the storage period. Coratina had the highest linolenic content at the third week while Manzanillo had the highest content after 4 weeks at 5˚C. There was no effect of the storage temperature or period on fruit lipids content but generally, the fruits that were stored at 20˚C contained lower values. | ||||
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