利用异源双代换系杂交产生染色体易位系

Production of Chromosome Translocation via Crossing Two Different Alien Substitution Lines in Wheat

Translocation lines with useful genes derived from wheat related species are valuable in wheat variety improvement. But it is not easy to produce them. The frequency of translocation line production is usually low in wheat. So far, most of translocation lines have been obtained by spontaneous translocation method. It was once suggested that univalent chromosomes would mis divide, reunion, and form chromosome translocation at meiosis. This theory has been supported by some experiments. We designed a series of experiments to increase univalent number at meiosis to test if univalent chromosome number was related to translocation frequency. Our results showed that crossing two different wheat alien substitution lines could indeed increase the frequency of chromosome translocations.