journal of kerbala university

This experiment conducted by using plastic pots in the Department of Biology – College of Education for Pure Science / University of Kerbala for the growing season 2012 – 2013 usingfactional experiment within a completely
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randomized design (CRD) with three replicates and three factor were five wheat cultivars (IPA99, Al-Iraq, Al-Rashid ,AL- Fateh and Abu-Graib) and three quality of irrigation water (1.8 ,4 and 8 ds.m-1) and two potassium levels (120 and 180 kg K.ha-1) . The aim of this study to determine the best characteristics as selection indices with grain yield in bread wheat .
Result showed that the broad-sense heritability of saline level at 1.8 ds.m-1 was high for each of the sodium concentration in the leaves , the ratio of potassium to sodium, potassium concentration in the grain , the concentration of protein in the grain , spike length , number of spikelets in the spike, number of grains per spike, harvest index and holds the grain yield , while the level of 8 ds.m-1 was the highest values for plant highest , and the weight of the root , the pollen sterility percent, the concentration of sodium in the leaves , the concentration of potassium in the leaves , ratio of potassium to sodium, the concentration of potassium in the straw , spike length , number of grains per spike .
The higher genotypic and phenotypic variation on all levels ofsalinitywere obtained from the

plant height, root length, the weight of the root, the pollen sterility percent , number of grains perspike,1000-grain weightandharvest index, so the chances ofsuccess ofthe selectionwill be the largestofthese traitsto the presence of largest variations.
That highest genotypic and phenotypic correlations are positivelyandsignificantlyin the level ofsaline1.8ds.m-1 werebetweengrain yieldand harvest indexgaving 0.84and0.91respectively, the level ofsaline8ds.m-1hasthe highest genotypic and phenotypic correlations are positivelyandsignificantlybetween grain yieldandgrains perspikewere0.68and0.64respectively.
Conclude fromthis studythat harvest indexin level ofsaline1.8ds.m-1 and thenumber of grains perspikeat thesalinelevel of8ds.m-1 can be adopted as selection indices because they were given the higher genotypic and phenotypic correlation and higher heritability.