A family of endosperm globulins encoded by genes located in group 1 chromosomes of wheat and related species

Summary A new group of proteins soluble in salt solutions and organic solvents (70% ethanol and chloroform-methanol mixtures), but not in water, has been isolated from wheat and rye endosperm. The molecular weights (23–26 kDa) and amino acid compositions of the different fractions characterized suggest a high degree of homology among the major components of the fractions in wheat and rye. Compensating nulli-tetrasomic and ditelosomic lines of hexaploid wheat have been analysed by two-dimensional electrophoresis and genes for these proteins have been assigned to the short arms of chromosomes 1 A, 1 B and 1 D. A similar analysis of Triticum aestivum/Secale cereale and T. aestivum/Agropyron elongatum addition and substitution lines has shown that genes for the corresponding globulins are located in the short arms of group 1 chromosomes of these species.