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Guyou 2173 was developed by crossing the high quality 3-line male sterile Gufeng A with the restorer line, Fuhui 2173. The hybrid rice exhibited the desirable characteristics including population uniformity, good color change during mycelium ripening, high yield, stable yield,ecological adaptabilities and high seed production. It has been certified by Fujian Crop Variety Evaluation Committee(Sanming) in 2011. Fuhui 2173 was a result of crossing Shuhui 527 as the female parent with A227 in Hainan in the spring of 2003. The F1 derived from the combination was applied as the female parent to cross with HK01 in Fuzhou in the fall of this year. And then, its F3 (HR328) and F4 (ER435) were planted in the rice-blast-infected field at Shanghang for cultivars-screening. The selected plant lines were repeatedly cultivated for several generations in Shaxian and Hainan to assure cultivar stability. This paper presents the breeding procedures, hybrid characteristics and seed production of Guyou 2173.
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