1选育思路20世纪90年代初杂交晚粳泗优422的选育成功,使育种家得到这样的启示,即通过粳、爪(籼粳中间型)交可能是进一步提高杂交粳稻优势的重要途径之一。因此,随之又有了六优121、泗优418、9优418、3优18等组合的问世。目前长江中下游推广的常规粳稻均为直立穗品种,丰产性和稳 Breeding ideas The successful breeding of the late hybrid rice Siyou 422 in the early 1990s made it possible for breeders to make the suggestion that crossing Japonica and paw (indica-japonica type) could be an important way to further improve the superiority of japonica hybrid rice one. Therefore, followed by the six excellent 121, Si You 418,9 You 418, You 18 and other combinations come out. At present, the conventional japonica rice popularized in the middle and lower reaches of the Yangtze River are erect panicle varieties with high yield and stability