How Is Rice Bred? A Detailed Explanation of Methods and Technical Key Points

In the process of hybrid rice breeding, the sterility of the rice male sterile line is affected by photoperiod-sensitive factors. The male sterile line generally shows sterility under the long daylight of April to September, while it shows fertility under the short daylight of September to April of the following year. Therefore, "two-line hybrid rice breeding" can increase yield by more than 20% compared with "three-line hybrid rice breeding", and it also overcomes the problems of a single source of male sterile cytoplasm and the relatively large limitation in the use of heterosis. The gene compatibility between indica and japonica subspecies is determined by their compatibility substances. Under the same conditions, the gene compatibility of "two-line hybrid rice breeding" and "three-line hybrid rice breeding" is the same. If you would like to learn more about rice breeding, we suggest that you contact the Green Food Research Institute of the Provincial Academy of Agricultural Sciences.