2005年，浙江省审定通过首个籼粳亚种间强杂种优势品种甬优6号。针对甬优6号存在的生育期偏长、植株高大、稻曲病偏重易发等问题，育种单位创新了育种理念和技术，品种管理部门在技术推广上有针对性地加强试验和示范，促进了浙江省籼粳杂交晚稻品种选育和审定推广，至2015年已审定品种21个，累计推广面积110.17万hm2，其中2015年达21.12万hm2，占全省杂交水稻种植面积的60%以上；开展籼粳杂交晚稻品种选育的科研单位和种业企业增加到14家，并更加关注适应不同推广区域、不同耕作制度的品种选育，同时施肥、用药等技术也更加精准易用。

Yongyou 6, the first strong heterosis of indica-japonica hybrid rice variety, was registered and released for commercial production in Zhejiang Province in 2005. Since then, the new concepts and technologies have been innovating to solve the problems of indica-japonica hybrid rice varieties, such as longer growth period, higher plant height and serious rice false smut. Meanwhile, the demonstration and test were conducted to strengthen the breeding, register and extension for the indica-japonica hybrid rice in Zhejiang Province. By 2015, the twenty-one indica-japonica hybrid rice varieties were registered and 1 101.7 thousands hm2 paddy field was planted. In 2015, the whole area of indica-japonica hybrid rice was up to 211.2 thousands hm2 and occupied sixty percent of total hybrid rice of Zhejiang Province. And now, Zhejiang Province already has fourteen institutes and companies being bred the indica-japonica hybrid rice varieties which adapt different kinds of paddy field, crop rotation, fertilizer application and plant protection.