Breeding And Popularization Of High-quality And Yield Two-line Hybrid Rice Peiza-629

Peiza629 is combinated with paoto-thermo-senisitive genic male sterile line Peiai64S and restoring line zhongzhonghui -629. The new two-line hybrid rice combination is owned Sanya filiale of china seed company group , and it was certified and registered by Hainan Committee for Crop Variety Registration in November 2005. In this paper,it has described the breeding process of the combination, summarize the producing seed technology and the cultivation technology, analysis the economic benefit of plant Peiza629 , the main findings and conclusions are as follows :1,It is more compatibly for producing Peiza629 seed in Hainan Sanya when arrange the rice heading stage in the end of April to early May; Producing rice seed in the southern of Hainan, the time difference for seed sowing date for the parents are 18 days in spring and 8 days in autumn.2,In the Peiza629 seed producing, usually accord 2:14 in the row-ratio of male Vs female. The female planting pattern of a spacing of 13.3 cm×13.3cm by 2-3 seedling per hole, the male planting pattern of a spacing of 19.8cm x 19.8 cm, then the spacing of parents are 16.5 cm. It was ought to accord "early", "prospective", "thick" third principle When spraying "920".3,In Hainan, it is general arranged sowing period in late December and early January next year when Peiza629 is used for early paddy rice cultivation, then arranged in early or mid May for late paddy rice sowing. The seedling age is 25 days for early paddy rice and 16-18 days for late paddy rice. It is the best culture time for cast transplanting rice when seedling has 3.1-3.5 leaves. There are general planting pattern of a spacing of 16.5cm x (19.8-23.3cm) for early paddy rice cultivation and planting 13.3 cm×16.5cm for late paddy rice, then achieve 250-300 thousand holes per mu. There are two rice seedlings per hole and make basic seedling number achieve 1.3-1.5 million per hectare.4,Zhongzhonghui629 is a high-quality, wide recovery, and with strong highly species recovery restorer line; In present, Peiza629 is the best quality varieties of Peiza series hybrid rice, which is in the first class standards of China rice quality standard. As early as 2004-2005, in the Hainan region test and production test, the average per hm2 yield is 7971.45 kilograms, it has increase 13.46% than the Texianzhan25 CK in rice yield, increase significantly. 5,The "company plus farmer" demonstration project is the pacing factor of successful popularization of Peiza629. Two years in 2005, 2006, the demonstration area of Peiza629 are 20,000 hectare, it was 150 thousand tons of high-quality rice have produced. At the same time, there were 170 hectares of land be used for Peiza629 seed production and total 510,000 kg seed was got, the direct economic benefits achieved 510,000 yuan and the socioeconomic benefit achieved 240 million yuan.