两优688是福建省南平市农科所用SE21S与南恢688配制而成的两系杂交稻新组合,2009年通过福建省品种审定(闽审稻2009007),2010年通过国家农作物品种审定(国审稻2010010)。2013年,永安市开始引进种植100亩,获得成功;2014年推广种植2 000亩,每亩产量687~750 kg。通过2年的示范种植,该组合表现产量高、稳产性好、适应性广、再 Liangyou 688 is a new two-line hybrid rice combination made by SE21S and Nanhui 688, which was used by Nanping City, Fujian Province. In 2009, it passed Fujian variety certification (Min-tiantao 2009007), and in 2010, it passed the national crop variety validation Diantan 2010010). In 2013, Yong’an City started to introduce and planted 100 mu of land for its success. In 2014, 2 000 mu of land was planted, yielding 687-750 kg per mu. Through 2 years of demonstration planting, the combination of high yield, good stability, wide adaptability, and then