A molecular cytogenetic analysis of chromosome behavior in Lilium ...

Chapter 4fragment have the same length would be rare. In addition, ectopic recombination is mostlynonreciprocal. Secondly, as shown in the results, the allelic homologies/homoeologies werestill available in the pollen mother cells that formed bridges at anaphase I. On the contrary,bridges happened not only between sister chromatids but also nonsister chromatids fromhomoeologous chromosome pairs (Fig. 4.1). Moreover, isochromosomes from centric fissionand fusion have also been found in the backcross progenies of LA lilies. All of these evidenceindicates that the repair of DSBs in bridge & fragment formation is nonhomologous. Thus,NHEJ is proposed to be involved in the repair of DSBs during meiosis of interspecific LAlilies.58