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嘉优1号(原名嘉优22-9)系浙江省首个跨地区杂交水稻育种、推广联合体(嘉兴市农业科学研究院联合长兴县种子公司、海盐县种子公司、嘉兴市种子公司、绍兴市农业科学研究院和诸暨市种子公司组建)选育而成的BT型三系中熟晚粳杂交水稻新组合。在各级试验和生产示范中表现穗大粒多、结实率高,稻瘟病抗性强、穗期高温耐性好,作单季晚稻、连作晚稻种植均高产稳产,品质优、食味好等特点。2005年2月通过浙江省农作物品种审定委员会审定。适宜在浙江省杭嘉湖、宁绍及邻省苏南、沪郊类似晚粳稻相似生态区推广应用。
Jiayou 1 (formerly Jiayou 22-9) is the first cross-region hybrid rice breeding and extension consortium in Zhejiang Province (Jiaxing Agricultural Research Institute, Changxing County Seed Company, Haiyan Seed Company, Jiaxing Seed Company, Shaoxing City Academy of Agricultural Sciences and the establishment of seed companies in Zhuji City) bred BT medium three lines of late japonica hybrid rice new combinations. At all levels of experiment and production demonstration, there are many features such as spike large grain, high seed setting rate, strong resistance to blast, high temperature tolerance at heading stage, high and stable yield, good quality and good taste in late season rice planting and continuous cropping. February 2005 approved by the Zhejiang Provincial Crop Variety Approval Committee. It is suitable for popularization and application in the similar ecological regions of Late Japonica Rice such as Hangzhou-Jiaxing-Huzhou, Ningshao and neighboring provinces, such as Sunan and Shanghai.