الفهرس 
Salinity and salinity toleranceOnly 14 pages are availabe for public view
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Abstract
The present investigation was carried out at the Expe~imeritdF arm of Rice Research and Training Center, Sakha, Kafi El-Sheikh, Egypt, during 2000 and 2001 seasons included two main experiments; i.e., experiment I (Sakha and El-Sirw) and experiment I1 (tap water, 4000 and 6000 ppm in the lysimeter). The first experiment involved six rice varieties; i.e., Gaori, GZ1368-S-5-4, Giza 177, Sakha 101, Sakha 104 and Giza 182, beside their 15 Fl’s crosses. The parents and FlYs were evaluated under two different environmental conditions (Sakha and El-Sirw) and twenty two traits; i.e. six agronomic, seven yield and its components, ~a’, K’, NaK ratio, and salinity index for studied traits and three grain quality characters, were studied. The studied traits were heading date, plant height, panicle length, straw weightlplant, flag leaf area and chlorophyll content as agronomic characters, number of panicleslplant, number of filled grainslpanicle, sterility percentage, panicle weight, 1000-grain weight, grain yield/plant and harvest index as a yield and its components characters; Na’+ content, K content, NaJK ratio salinity index for number of filled grainslpanicle, salinity index for 1000-grain weight and salinity index for grain yieldplant as ~a+K’, , NdK ratio, and salinity index for studied traits; grain shape, hulling percentage and milling percentage as a grain quality characters. This experiment was executed in a R.C.B.D. with three replications and the data were analyzed according to Griffing (1956) method 2 and model 1. The objectives are to study: 1. Heterosis relative to the better parents of the diallel crosses for the characters studied. 2. The magnitude of both general and specific combining abilities with the two conditions. 3. The phenotypic conelation coefficients among different traits.