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我们用佛山地区部分县种植的已退化的晚籼矮秆品种“平朝9号”,于1973年晚造开始进行花粉培养,当年冬花粉一代植株移植于玻璃温室内,未作遮光处理,主穗及分蘗穗在晚冬及早春条件下通过短日照,第二年5—6月抽穗成熟,得到少量第一代种子。1974年7月25日将第一代种子播于田间,得到第二代花粉植株,8月8日插单株,秧龄14天,插植规格6×6寸。对照为1973年晚造在同一材料中穗选留的种,播种、插植期和其它栽培管理措施与花粉植株相同。花粉植株来自两块不同的愈伤
We used the degraded late indica dwarf variety “Ping DPR 9” planted in some counties of Foshan City to start the pollen culture in the late evening of 1973. When the first generation of winter pollen plants were transplanted into the glass greenhouse, Ear and tiller panicles were short-day in late winter and early spring, and were matured from May to June in the second year to obtain a small amount of first-generation seeds. On July 25, 1974, the first generation of seeds was sowed in the field and the second generation of pollen plants was obtained. On August 8, the individual plants were inserted and the seedling age was 14 days. The planting specifications were 6 × 6 inches. The control was made for spike selection in the same material in the evening of 1973, and sowing, planting and other cultivation management measures were the same as pollen plants. Pollen plants come from two different calluses