STUDIES ON SOME WHEAT CROSSES UNDER SALINE CONDITIONS | ||||
| Journal of Plant Production | ||||
| Article 4, Volume 29, Issue 10, October 2004, Page 5455-5466 PDF (3.39 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2004.238822 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| A . I. A. Hassan,; S. A. Omar | ||||
| Plant Breeding Unit, Plant Genetic Resources Dept., Desert Research Center (D.R.C), Mataryia, Egypt. | ||||
| Abstract | ||||
| 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. | ||||
| Keywords | ||||
| Bread wheat (Triticum aestivum L.) . Segregating; generation; salinity stress; genotypic correlation; hertability; variability; path coefficient analysis | ||||
|
Statistics Article View: 42 PDF Download: 133 |
||||
