Genetic evaluation of some biochemical characters of Barley varieties grown under salinity

The main objective of this study was to investigate the genetic system controlling the nucleic acids and the total protein content in barley grown under different concentrations of salinity including the control treatment. The additive genetic variance was more important than dominance genetic variance in the inheritance of DNA content under SI treatment. While additive and dominance types of genetic effects showed an equal importance in the inheritance of RNA content under SO treatment and total protein content under SI treatment. The average degree of dominance was found to be over dominance for DNA content, RNA content and total protein content. The negative and positive alleles were somewhat equally distributed among the parental populations in most cases. The dominant genes are in excess in the parents in case of RNA content under SO treatment and DNA content under SI treatment. The low values of narrow sense heritability in all cases indicated that the traits were greatly influenced by the environmental factors. The variety c.c.89 seems to possess most of the dominant genes for DNA content under SO treatment. California Mariout possess an excess of recessive over dominant genes under S2 treatment for total protein content. While dominance excess recessive under SO treatment for DNA content