Hybrid rice refers to the selection of two rice varieties with certain genetic differences, whose excellent characters can complement each other to produce the first generation hybrid with heterosis, that is, hybrid rice. Generally, hybrid rice only refers to the first generation hybrid formed by crossing two sterile lines and restorer lines with the same genetic background.
The large-scale popularization of hybrid rice mainly uses rice male sterile lines as genetic tools. China is the first country in the world to successfully develop and popularize hybrid rice. Hybrid rice has high heterozygosity, separated offspring and seed production every year. Corresponding to hybrid rice is conventional rice.
Related introduction:
The hybrid rice invented by China has developed rapidly in China, and has been widely used in Vietnam, Indonesia, the Philippines and the United States abroad, and has achieved remarkable yield-increasing effects.
On June 7th, 20021year, 65438+1October, the National Hybrid Rice Engineering Technology Center (Hunan Hybrid Rice Research Center) carried out the key research on yield measurement and acceptance of 202 1 mu yield 1500 kg in southern rice areas, and the average yield per mu of late rice was 936./kloc-.
In addition, the average yield per mu of early rice measured before was 667.5438+0 kg, and the double-season yield of hybrid rice developed by Yuan Longping, the father of hybrid rice, was 1603.9 kg, which successfully broke the target of 1500 kg per mu and set a new historical record.