嘉优中科3号是浙江省嘉兴市农业科学研究院联合中国科学院遗传与发育生物学研究所等单位，采用自主选育的柱头外露率高的优质粳稻三系不育系嘉66A作母本、穗大粒多的广亲和籼稻恢复系中科嘉恢1293为父本配制而成的三系杂交水稻新组合，2016年通过浙江省农作物品种审定。本文介绍了嘉优中科3号的选育过程、特征特性、栽培技术及制种要点。

Jiayouzhongke 3 is a new three-line hybrid rice combination, derived from the high stigma exsertion rate, fine quality japonica male sterile line Jia 66A and the wide-compatibility indica restorer line zhongkejiahui 1293 with big panicles, more grains, bred by Jiaxing Academy of Agricultural Sciences in Zhejiang Province in collaboration with the Institute of Genetics and Developmental Biology, Chinese Academy of Sciences. It was registered and released by the Zhejiang Provincial Crop Variety Approval Committee in 2016. This article described the breeding process, characteristics, cultivation techniques and seed production techniques of Jiayouzhongke 3.