嘉66A是浙江省嘉兴市农科院联合有关单位育成的优质晚粳BT型三系不育系，柱头外露率高，2014年12月通过浙江省农作物品种审定委员会组织的现场技术鉴定。本文主要介绍了嘉66A的选育过程及特征特性。

Jia 66A is a japonica male sterile line with high stigma exsertion rate, fine quality and independent intellectual property rights, which was cultivated by Jiaxing Academy of Agricultural Sciences associated with other units. It was identified by Zhejiang Crop Variety Identification Committee in December 2014. The breeding process and characteristics of Jia 66A were introduced in this article.