R.G. Kynast, B. Friebe, and B.S. Gill. A total of 11 disomic and 30 monosomic deficiencies for the chromosomes 1R, 2R, 3R, 4R, 5R, and 6R were identified and analyzed for breakpoint positions and chromosome end healing. Frequent centromere breakage and fusion between wheat and rye chromosomes are evident and are discussed. Gc-induced chromosome breaks occur in postmeiotic divisions of the gametophyte. However, BFB cycles cease before entering meiosis, because of chromosome healing or cell death.
Chromosomes heal by acquisition of new telomeres.
The broken chromosome termini most likely become stabilized by the de novo addition of telomeric DNA repeats and remain stable. This healing process is catalyzed by the telomerase enzyme. Plant and Animal Genome VI Abstracts. Plant cytogenetics at the dawn of the 21st century. B.S. Gill and B. Friebe.