subject: Himfr Reports Breakthrough Of Hybrid Wheat Breeding [print this page] Chinese scientists in hybrid wheat breeding, thereby facilitating their important results, from Northwest University and Shaanxi Province to complete the national scientific and technological project "YS-type temperature sensitive male sterile lines of wheat and genetic characteristics of creation," the results recently adopted in Shaanxi Yangling Shaanxi Provincial Science and Technology Department of the results of identification. Liu Dajun academicians and other experts agreed that the Institute was founded in YS-based Thermo sterility and stability, to adapt to the ecological conditions of China's major wheat producing areas, the utilization of heterosis in wheat opened up a new way.
Research and utilization of wheat heterosis over the past focused on male sterility three-line system of exploitation and utilization system of chemical hybridizing agent, but the production of hybrid wheat to the process, use of male sterility three-line production of hybrid wheat seed breeding system kind of system there unexpected technical obstacles. As the wheat crop is a small plant, production groups, large and small spacing, pollination using male sterile line breeding to maintain the CMS line seed, easily create and maintain a sterile hybrid system, CMS adopted after having been mixed with the maintainer line solution to the complex field. In addition, maintaining the same line with the sterile plant height, outcrossing is poor, low seed production is also a problem Breeding male sterile lines. Therefore, the high cost of sterile seed production, and Purity difficulties, restricted the application of three-line hybrid wheat expansion of the scale. The chemical hybridizing agent in hybrid wheat breeding in the existence of high cost, spraying techniques not easily mastered by farmers and environmental security. Northwest A & F University, led by Professor He Beiru scientific research group, beginning in 1990 on wheat photo (thermo)-sensitive male sterile two-line system to study, after 13 years of efforts, finally in the wild wheat chromosomes found a Temperature Sensitive Male infertility genes, invented this Wenmin Ji easy to import wheat because of the method. The method in March this year, the national patent, and wheat bred to adapt to the ecological conditions of the Huang-Huai YS Temperature Sensitive Male Sterile Line of Wheat. This method can be modified into any wheat-based Thermo YS. It is understood, YS Wheat Thermo has a good temperature-sensitive characteristics, fertility conversion and day length was not significantly correlated; in fertile environment, the seed setting rate and significantly correlated with relative humidity. Years of testing showed that the wheat production area showed complete male sterility safety sowing up to 60 days; fertility transition temperature and application of security at home and abroad were significantly higher than other temperature sensitive male sterile lines of wheat. Discussion group in China Yangling, Shijiazhuang, Yuanmou, Guiyang, mutual aid, according to Ann and Wuwei seven different latitudes results show that the planting locations, YS type of wheat in the Huang-Huai Thermo winter wheat areas, the Yunnan-Guizhou winter wheat region, Northwest Spring District, northeast after the normal planting spring wheat areas showed stable male sterility, while the winter wheat areas in the Huang-Huai and the Yunnan-Guizhou Spring, Summer Seeding can be sterility, suitable conditions, the seed setting rate of up to 40% to 70%. Pei, such as scientific research team, led by use of temperature sensitive male sterile materials also bred wheat production areas suitable for cultivation of hybrid wheat advantage of the new combination of strong 5.
The project of Science and Technology, National Natural Science Foundation, the Ministry of Agriculture, Ministry of Education and the support of Shaanxi Province.
by: himfr
welcome to Insurances.net (https://www.insurances.net)
