Five F4 and Fs selected families of five bread wheat crosses were evaluated
at Ras Sudr Research station of Desert Research Center, south- Sinai Governorate in
two growing seasons 2001 I 2002 and 2002 I 2003 winter under salinity of irrigation
water (about 10000 and 11000 ppm around the two seasons respectively. ) .At 80
days after sowing, 10 guarded plants were selected randomly to measure chemical
contents in composite sample leaves of each F4 and Fs families i. e. praline (in fresh
samples), KINa ratio, Mg, Ca and S04 ( in dry sample ). At harvest, fifteen
competitive plants from each plot were selected to record observation on plant height.
NO. of spikes I plant, NO. of grainsl spike, 1000 - grain weight and grain yield I plant,
Simple correlation, genotypic coefficients of variability, hertability and path analysis
were calculated . The obtained results can be summarized as follows: 1- Interrelationships among the studied characters under such saline conditions
varied in magnitude according to the F4 and Fs populations. 2- Correlation between grain yield I plant and each of leaves chemical contents and
yield attributes were positive and significant in most cases correlated to grain yield
Iplant, for improving grain yield under such saline conditions. Heavy grains, high
NO. of grains I spike , high content of praline in fresh leaves and high S04
content in dry leaves considered to be a suitable selection criteria . 3- Hertability values varied among traits and between populations studied therefore,
selection for the yield attributes may be effective for improving grain yield which
had moderate to high ( GCV) values among F4 and Fs selected families .Hence,
the direct selection for improvinq yielding ability was effective and path analysis
must be done to detect the joint effects. 4- The total contribution of each leaves chemical contents showed that praline and
S04 contents were the most shurefull characters of grain yield for the studied
wheat crosses of F4 and Fs families as it contributed by 24.09 and 33.87%
respectively. In general, chemical contents could be arranged over all studied F4
and Fs populations as follows: S04, praline, Mg, K INa and Ca. 5- The main source of grain yield variation was 1000 - grain weight followed by NO. of
grains I spike and Grain yield I plant under saline conditions in three or more F 4
and Fs families . Such highly contributed traits easily measured and gave a
valuable idea for selection to yield improvement under saline conditions.