Abstract: Core germplasm Lüzhenzhan 8 (LZZ) in good quality rice was created by merging of good quality germplasm in late rice (indica) into elite germplasm in early rice (indica). Lühuangzhan, Lüyuanzhan 1 and Lüyuanzhan 7 were bred by further improvement of LZZ via incorporation of germplasm from Australia, japonica and wild rice into local germplasm. The approach to breeding and utilization of core germplasm in good quality rice among ecotypes, varieties from different continents, subspecies and species was discussed.

Key words: breeding, core germplasm

摘要： 通过连续改良将华南晚籼优质稻血缘与早籼优良种质融合，创造出早晚兼用型优质稻核心种质绿珍占8号；进一步利用地理远缘优质稻澳洲袋鼠丝苗和野生稻、粳稻、籼稻新育成种三源92与之优化配组，经定向选择育成优质稻新品种绿黄占、绿源占1号和绿源占7号。讨论了优质稻改良中生态型间、地理远缘、亚种间、种间育种材料血缘渗透和核心种质创建与利用有关问题。

关键词: 育种, 核心种质, 品质, 水稻