K优402是四川省农科院水稻高粱研究所用粳质籼核新资源不育系K17A与湖南省安江农技育成的早熟恢复系402配组育成的杂交早稻新组合，1996年4月已通过四川省品种审定委员会审定。温州市于1994年引进观察，1995、1996两年参加市杂交早稻区域试验，并进行生产示范，1996年全市共示 K You 402 was a new early-maturing hybrid rice combination developed by Sichuan Academy of Agricultural Sciences Rice Sorghum Institute with indica nuclear line K17A of japonica indica and 402 lines of early maturing restorer developed by Anjiang Agricultural Science and Technology Academy of Sichuan Academy of Agricultural Sciences. It passed in April 1996 Sichuan Province Variety Approval Committee validation. Wenzhou City in 1994 to observe the introduction, 1995,1996 two years to participate in hybrid rice early rice regional trials, and production demonstration, the city in 1996 were