PERFORMANCE OF SOME RICE GENOTYPES UNDER BOTH SALINITY AND WATER STRESS CONDITIONS IN EGYPT | ||||
| Journal of Plant Production | ||||
| Article 8, Volume 4, Issue 8, August 2013, Page 1235-1255 PDF (1.15 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2013.74084 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| H. M. Hassan; W. M. El-Khoby; A. A. El-Hissewy | ||||
| Rice Research Section, Field Crops Research Institute, ARC, Giza, Egypt. | ||||
| Abstract | ||||
| 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 GZ1368 –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. The results showed that also PCV (phenotypic coefficient of variance) in general was higher than GCV (genotypic coefficient of variation) for various characters. However the difference between GCV and PCV was low for most of the characters studied. This indicates less degree of environmental influence on manifestation of these characters. High heritability coupled with high genetic advance were recorded for number of filled grains per panicle, number of panicles/ plant and grain yield/ plant indicated the major role of additive gene action in the inheritance of these characters and these characters could be improved by selection in early segregating generations. Thus, these characters may serve as an effective selection parameter during breeding program for crop improvement. | ||||
| Keywords | ||||
| super rice; salinity; Water stress; Grain yield; genotypic and phenotypic coefficients of variability; heritability and genetic advance | ||||
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