两优培九（原名６５００２）系江苏省农科院以培矮６４S为母本、９３１１为父本育成的两系亚种间杂交中熟籼型新组合，是我国第一个投入大面积生产应用的两系杂交稻，１９９９年和２０００年在云南创下单季每６６７m２产量达１１３９kg和１１６８kg的记录。两优培九集高产优质 Liangyoupeiju (formerly 65002) is a new medium-maturing indica hybrid rice combination of two lines subspecies bred by Pei’ai 64S in Jiangsu Academy of Agricultural Sciences and 9311 as its male parent. It is the first plant in China that has been put into large-scale production applications Department of hybrid rice, in 1999 and 2000 in Yunnan hit a single crop per 667m2 production of 1139kg and 1168kg record. Liangyoupeiju set high yield and quality