Sobieh,, S., Shehata, S. (2006). EVALUATION OF SOME RICE MUTANTS UNDER WATER STRESS CONDITIONS.. Journal of Plant Production, 31(6), 3325-3334. doi: 10.21608/jpp.2006.236024
S. EI·S.S. Sobieh,; S. M. Shehata. "EVALUATION OF SOME RICE MUTANTS UNDER WATER STRESS CONDITIONS.". Journal of Plant Production, 31, 6, 2006, 3325-3334. doi: 10.21608/jpp.2006.236024
Sobieh,, S., Shehata, S. (2006). 'EVALUATION OF SOME RICE MUTANTS UNDER WATER STRESS CONDITIONS.', Journal of Plant Production, 31(6), pp. 3325-3334. doi: 10.21608/jpp.2006.236024
Sobieh,, S., Shehata, S. EVALUATION OF SOME RICE MUTANTS UNDER WATER STRESS CONDITIONS.. Journal of Plant Production, 2006; 31(6): 3325-3334. doi: 10.21608/jpp.2006.236024
EVALUATION OF SOME RICE MUTANTS UNDER WATER STRESS CONDITIONS.
1Plant Research Department, Nuclear Research Center, Atomic Energy Authority, Abu Zaabal13759, Egypt.
2Rice Research and Training Center, Sakha, Kafr EI-Sheikh, 33717 Egypt.
Abstract
Two field experiments were carried out during two successive growing seasons (2004 and 2005) in a farm located at Sahafa village. Sharkia Governorate, to evaluate some new rice mutants comparing with the local variety Giza 177 ( sensitive )and exotic rice variety lET 1444 ( tolerant) for drought tolerance and efficient use of irrigation water under three irrigation intervals, i.e., irrigation after 4 ( control ), 6 and 8 days for water stress treatments.
The results showed that:
1- Maximum grain yield and its components were obtained when rice plants were irrigated every 4 days intervals, while increasing irrigation intervals up to 8 days significantly decreased grain yield and its components.
2- Mutants MG 16 and MS 6 were superior in plant height, panicle length, number of grains per panicle, panicle weight and 1000 grain weight, while the maximum values of number of panicle I m2 and straw yield were obtained by lET 1444 variety.
3- The ranking for grain yield (tlfed.) was as follows: MG 16 > 1FT 444 > MS 6 > Giza177.
4- The interaction between irrigation intervals and rice genotypes had no significant effect on yield or any of its attributes.
5- According to stress susceptibility index for different rice genotypes Mut. MG16 was tolerant to drought comparing with the other genotypes.
6- The highest water use efficiency (WUE) was obtained by Mut. MG 16 under sever water stress comparing to the other genotypes.
7- Irrigation of rice plant every 6 days interval saved 2140.74 m3I fed. (24.9 %) comparing with the control treatment.
8- Mut. MG 16 with its highest yield, water use efficiency and lowest values of stress susceptibility index under drought conditions, So, it was consider the most tolerant comparing with the rest of genotypes.
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