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Preliminary studies on hybrid rice seed production technology in Egypt [electronic resource].

By:

Abo Youssef, M. I

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Language: English Summary language: Arabic Description: p.197-204Other title:

دراسات أولية علي تكنولوجيا إنتاج تقاوى الأرز الهجين في مصر [Added title page title]

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Egyptian journal of agricultural research, 2005 v. 83 (5) A, Special issue [electronic resource]:

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In: Egyptian Journal of Agricultural Research 2005.v.83(5)A,SISummary: F1 seed production experiments were conducted at RRTC Farm, Sakha, Kafr EI-Sheikh, Egypt during 2001 and 2002 summer seasons for two promising hybrid rice combinations, viz., IR 69625 A/Giza 182 Rand IR 58025 A/Giza 178 R. Different sowing dates of the male and female parents were applied to get the best flowering synchronization . Three row ratio, 2R:8A, 2R:10A and 2R: 12A in two sowing seasons were applied for both hybrids in split plot design. A 200g dose of GA3 was used and split in two sprays. First spray (80 g GA3) was done when 15-20% of female tillers emerged. The balance of GA3 (120 g/ha) was sprayed when 40% tillers emerged. The results revealed that the best flowering synchronization of the parents was achieved when IR 69625Awas sown 7-9 days earlier than Giza 182 R, and IR 58025 A 12 days earlier than Giza 178 R. The row ratio of 2R:10A gave the highest yield for both hybrids in two seasons. The average seed yield ranged from 2.85 to 3.19 tons/ha for the first hybrid and 2.85to 3.11 tons/ha for the second hybrid under these experiments

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F1 seed production experiments were conducted at RRTC Farm, Sakha, Kafr EI-Sheikh, Egypt during 2001 and 2002 summer seasons for two promising hybrid rice combinations, viz., IR 69625 A/Giza 182 Rand IR 58025 A/Giza 178 R. Different sowing dates of the male and female parents were applied to get the best flowering synchronization . Three row ratio, 2R:8A, 2R:10A and 2R: 12A in two sowing seasons were applied for both hybrids in split plot design. A 200g dose of GA3 was used and split in two sprays. First spray (80 g GA3) was done when 15-20% of female tillers emerged. The balance of GA3 (120 g/ha) was sprayed when 40% tillers emerged. The results revealed that the best flowering synchronization of the parents was achieved when IR 69625Awas sown 7-9 days earlier than Giza 182 R, and IR 58025 A 12 days earlier than Giza 178 R. The row ratio of 2R:10A gave the highest yield for both hybrids in two seasons. The average seed yield ranged from 2.85 to 3.19 tons/ha for the first hybrid and 2.85to 3.11 tons/ha for the second hybrid under these experiments

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