EVALUATION OF SOME RICE MUTANTS UNDER WATER STRESS CONDITIONS.
Sobieh,, S., Shehata, S. (2006). EVALUATION OF SOME RICE MUTANTS UNDER WATER STRESS CONDITIONS.. EKB Journal Management System, 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.". EKB Journal Management System, 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.', EKB Journal Management System, 31(6), pp. 3325-3334. doi: 10.21608/jpp.2006.236024
Sobieh,, S., Shehata, S. EVALUATION OF SOME RICE MUTANTS UNDER WATER STRESS CONDITIONS.. EKB Journal Management System, 2006; 31(6): 3325-3334. doi: 10.21608/jpp.2006.236024

EVALUATION OF SOME RICE MUTANTS UNDER WATER STRESS CONDITIONS.

Journal of Plant Production
Article 5, Volume 31, Issue 6, June 2006, Page 3325-3334  XML PDF (2.66 MB)
Document Type: Original Article
DOI: 10.21608/jpp.2006.236024
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Authors
S. EI·S.S. Sobieh,1; S. M. Shehata2
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 m3 I 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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