Abstract:

Zheyou 77, a new combination of long-grain indica and japonica hybrid rice, is a medium-maturity three-line indica and japonica hybrid rice co-bred by Crop and Nuclear Technology Utilization Institute of Zhejiang Academy of Agricultural Sciences, Guzhiyu (Huzhou, Zhejiang) Agricultural Technology Co., Ltd., and Hangzhou Seed Industry Group. It was composed of long-grain japonic-based sterile line Zhehang K68A (Zhe75A) as the maternal parent and a wide-compatibility partial indica restorer line Zhehui F27 as the male parent, and passed the Zhejiang provincial variety approval (Zhejiang-approved Rice 2024017) in 2024. Zheyou 77 has the characteristics of high yield, excellent rice quality, good color transformation and wide adaptability, which is suitable for single season late rice planting in Zhejiang Province and surrounding rice areas. In this paper, the breeding, variety characteristics and cultivation techniques of Zheyou 77 were briefly introduced.)

Key words: Zheyou 77, long-grain indica and japonica hybrid rice, breeding, characteristics