Spatial arrangement analysis of wheat and rye genomes in triticale interphase nuclei by gamma-radiation induced chromosomal interchanges

Abstract

Gamma-radiation chromosomal interchanges are induced in the “Cachirulo” hexaploid triticale to analyze the spatial arrangement of wheat and rye genomes in the somatic nuclei. The frequencies of wheat–wheat, wheat–rye and rye–rye dicentric chromosomes observed fit a random distribution. While the centromeres of different genomes may be separate in space, the arms of the wheat and rye chromosomes are, in general, randomly disposed within the nucleus.