since p>1964, the research on rice male sterility was initiated in China. On July 5th, a strange "natural male sterile plant" was found in Dongting early indica rice field of Anjiang Agricultural School Practice Farm, which was first discovered in China. After artificial pollination, hundreds of seeds of the first generation of male sterile materials were produced.
on November 23, 197, under the guidance of Yuan Longping's idea of "widening the genetic relationship of hybrid breeding materials as much as possible, crossing with a distant wild rice and cultivated rice", Li Bihu and Feng Keshan, assistants, found "wild failure" in Nanhong Farm, Hainan Island, which opened a breakthrough for the three-line matching of indica hybrid rice.
In the spring of p>1971, Hunan Academy of Agricultural Sciences set up a hybrid rice research collaboration group, and Yuan Longping transferred the work of the hybrid rice research collaboration group of Hunan Academy of Agricultural Sciences.
In March, 1972, the State Science and Technology Commission listed hybrid rice as a key scientific research project in China, and organized China to cooperate in tackling key problems. Yuan Longping distributed the materials of "Wild Abortion" to more than 3 scientific research units in more than 1 provinces and cities in China, and carried out tens of thousands of test crosses and backcross transfer experiments with thousands of varieties of "Wild Abortion", which expanded the selection probability and accelerated the process of three-line matching. In 1972, Yuan Longping bred the first sterile line Erjiunan No.1 in China.
in p>1973, the collaboration team found the restorer line through the test crossing, and overcame the supporting difficulties of the "three lines". In October, Yuan Longping published the paper "Progress in Breeding Three Lines by Wild Abortion" at the rice scientific research conference held in Suzhou, officially announcing that the "Three Lines" of indica hybrid rice in China has been matched.
in p>1974, Yuan Longping bred "Nanyou No.2", the first heterosis hybrid combination in China. Trial planting in Anjiang Agricultural School, the yield of 667 square meters is 628 kg. In the following year, 1.33 hectares of late rice was cultivated, and the yield of 667 square meters was 511 kilograms. Conquered the "advantage".
In p>1975, with the support of the Hunan Provincial Party Committee and the provincial government, large-scale seed production was successful, which prepared the seeds for large-scale popularization in the following year, and made the research results enter the stage of large-scale popularization.
In p>1975, Yuan Longping conquered the "Seed Production Pass" and groped for the success of seed production technology.