Performance of some rice genotypes under both salinity and water stress conditions in Egypt [electronic resource].

Includes references.

The present investigation was carried out at Rice Research and Training Center (RRTC), Sakha, Kafr El-Sheikh, Egypt, during summer seasons 2011 and 2012 as a preliminary study to breed for Egyptian super rice varieties. The objectives of the present study ware aimed to comprise 10 local and exotic rice cultivars to be tested under the two stresses, salinity and water stress in order to identify one or more genotypes could be grown under both conditions and/or to be utilized as a donor in the program to establish an Egyptian super rice varieties. Results clearly showed significant and highly significant differences between examined genotypes regarding all studied characters as affected by the different salinity levels and water stress conditions in the two seasons. Under the two conditions all of the investigated characters were decreased significantly by increasing salinity levels except sterility % increased by increasing salinity levels. The results also revealed that GZ 1368 -S-5-4 followed by Giza 179 and Giza 178 were found to be the highest tolerant rice genotypes to salinity levels beside to its significant degree of drought tolerance, these genotypes could be nominated to be grown either under salt effected soil or under water stress conditions and/or used as a donor for those types of stresses in any crossing program towards breeding for Egyptian super rice varieties. On the other hand, although, Sakha 102, Sakha 101 and Giza 182 which exhibited high yielding under_normal conditions, they were found to be highly sensitive rice genotypes under both salinity and water stress conditions.

Summary in Arabic.

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