Chinese researchers published a report in the online magazine "Nature" on the 7th that they have made breakthroughs in the genetic basis of high-yielding heterosis in hybrid rice, and related results will help optimize the strategy of designing breeding to meet global food security needs.
Since the 1970s, Chinese breeders have taken the lead in carrying out studies on the utilization of rice heterosis, and have significantly increased rice yield by promoting a series of high-yielding hybrid combinations. The high yield of hybrid rice comes from the effective use of the heterosis of rice. The development of heterosis is a result of the interaction of the parents and is a complex biological phenomenon. However, the genetic mechanism behind this phenomenon has not been fully understood. .
Institute of Plant Physiology and Ecology, Chinese Academy of Sciences Han Bin Research Group of National Gene Research Center, Huang Xuehui Research Group and Yang Shihua Research Group of China National Rice Research Institute, collected 1495 hybrid rice varieties, almost covering most of Chinese hybrid rice Varieties, genomic analysis of 17 representative genetic populations and field yield traits were investigated. The genetic basis of heterosis of hybrid rice was analyzed in detail using a series of new technologies, and the molecular genetic mechanism of rice heterosis was finally analyzed.
They found that the performance of rice heterosis was determined by the identified genetic loci, and genetic loci that control rice heterosis mostly showed incomplete dominance in heterozygous state. A new genotype was produced through cross breeding. As a result of the combination, the hybrid generation can efficiently achieve the ideal combination of various factors such as flowering period, plant type, and yield of rice to form heterosis.
Han Bin, one of the report's correspondents, said in an interview with the Xinhua News Agency reporter that using this research result, researchers are expected to further optimize the hybridization and improvement of rice varieties and achieve efficient selection and mating of parental materials to serve with high cooperation. The creation and improvement of traditional rice materials with the parental materials of force characteristics and the parents' advantages have led to the selection of more high-yield, high-quality and multi-resistance rice genetic resources.
Safety 3Ply Face Mask, Protective Face Mask, Non Woven Surgical Mask, Anti virus Surgical Mask
GUANGZHOU HTD INTERNATIONAL , https://www.maskhtd.com