The new technology system of hybrid rice seed production can solve the problem of high cost of seed production
Results broadcast
Science and Technology Daily News (Reporter Zhao Hanbin) Science and Technology Daily reporters learned from Yunnan Agricultural University on February 6 that the school's rice cropping researchers have recently successfully constructed a new system for hybrid rice female sterility seed production, which provides new opportunities for mechanized and efficient seed production. technical solution.
The research results were published online in the international journal Frontiers in Plant Science.
The team of Professor Li Dongxuan and Professor Chen Lijuan from the Rice Crop Research Institute of Yunnan Agricultural University realized the lethal deletion of transgene and female sterility at the seedling stage of rice by expressing the female fertility control gene FST in rice and using bentazon transgenic "transition" deletion technology. The new system of hybrid rice seed production technology of "FM line method" is further constructed, which provides a new system for the realization of mechanized and efficient hybrid rice seed production. new technical solutions.
The research group used the previously discovered and reported natural mutant FST of completely abortive rice female sterility. The establishment and application of a new hybrid rice seed production technology system with "FM line method" provides abundant pollen donor materials.
Subsequently, the research team constructed a FST gene expression element for complementing the female fertility of transgenic rice in the Plant Molecular Breeding Laboratory of the Rice Crop Research Institute of the university, and a functional RNAi that is sensitive and lethal to bentazon herbicide for transgenic screening. The elements were closely linked and introduced into the rice GMS line, and the genetically engineered rice GMS line was successfully created, and the breeding of the non-transgenic GMS seedlings was realized.
In addition, the research group further compared the seed production efficiency of the new system of "FM line method" hybrid rice seed production technology under different mixed planting ratios and different cultivation modes.
The results showed that, compared with the traditional "bar-box" seed production mode, the "FM system method" through the random mixed planting mode significantly improved the seed production efficiency.
This hybrid rice seed production technology innovation system can effectively solve the current bottleneck problems of high cost and low yield in hybrid rice seed production.