One More Evidence about Homoeology between the First and the Fourth Groups of Chromosomes of the Wheat (T. aestivum L.) and Aegilops umbellulata Zhuk.

Ts. STOILOVA
Bulgarian Academy of Sciences, Institute of Genetics “D. Kostoff”, BG-1113 Sofia, Bulgaria

Abstract

STOILOVA, Ts., 2002. One More Evidence about homoeology between the first and the fourth groups of chromosomes of the wheat (T. aestivum L.) and Aegilops umbellulata Zhuk. Bulg. J. Agric. Sci.; 8: 341–344

The homoeology between the chromosomes of the first and the fourth groups in ten wheat lines derived from population of F4BC1 obtained after crossing between T. aestivum cv. Aurora and the wild species Aegilops umbellulata was investigated by analyzing the electrophoretic patterns of the gliadins, glutenins and albumins. Five of the wheat lines expressed qualitative differences in two gliadin monomers belonging to the ω- and γ- gliadins and one LMW glutenin subunit as well as quantitative differences in the albumin patterns compared to cultivar Aurora. The other five of the wheat lines, however, appeared to be indistinguishible from cultivar Aurora. The analysis of the three protein groups revealed preferential variability of a protein monomers and subunits controlling by the chromosomes 1BS (locus Gli B1), 1AS+1DS (locus Gli A1), 1AS (locus Gli B3), 4DL and 4BL that was due to introgressions of genes from the U genome of Ae. umbellulata. The modification in the expression of the proteins which are markers of the first and the fourth group of chromosomes provided an estimate of interspecific homoeologous relationships between the chromosomes 1B, 1A, 1D, 4D and 4B of the wheat and Ae. umbellulata.

Key words: wheat, Aegilops umbellulata, seed storage proteins, homoeologous relationships