Exploitation of recombination-enhancing factors for enhancement of breeding efficiency

发现促进减数分裂重组的因素，将提高育种效率。然而，由于同源染色体通常无法区分，因此没有检测它的实验系统。在这项研究中，我们产生了携带两条来自不同物种的外来染色体的小麦品系，并发现两条外来染色体在减数分裂前期相关。此外，我们发现斑马碱在有丝分裂中诱导染色体重排，并轻微影响减数分裂染色体配对。此外，我们还尝试将ph1b基因引入外源染色体附加系。

Breeding efficiency will be increased if the factors promoting meiotic recombination will be discovered. However, because homologous chromosomes cannot be discriminated usually, there are no experimental systems to detect it. In this study, we produced wheat lines carrying two alien chromosomes each of which are derived from different species, and found lines in which two alien chromosomesassociated in the meiotic prophase. In addition, we found that zebularine induced chromosome rearrangements in mitosis and affected slightly the meiotic chromosome pairing. In addition, we tried to introduce ph1b gene to the alien chromosome addition lines.