高直链淀粉型杂交中稻新品种川谷优6684是四川省农科院水稻高粱研究所利用自育恢复系泸恢6684为父本，以四川农业大学水稻研究所选育的三系不育系川谷A为母本配组育成的三系杂交稻新组合，具有稳产性好、熟期适中、抗逆性强、直链淀粉含量高等特点。2013年通过四川省品种审定。

Mid-season hybrid rice Chuanguyou 6684 was a new three-line hybrid rice combination, bred by Sichuan Academy of Agricultural Sciences with Chuangu A as female parent and Luhui 6684 as male parent. It has good and stable yield, proper maturity, strong resistance and high amylose content, and approved by Sichuan Provincial Crop Variety Appraisal Committee in 2013.