Founder parents of 260 approved rice cultivars in Heilongjiang Province and pedigree of bred cultivars after 1990s were analyzed. The results showed that founder parents of bred cultivars before 1990s were Shishoubaimao, Nonglin11, Xiayi, cultivars bred or derivative from them accounted for 83.3％ in the same period cultivars. The core founder parent was Shishoubaimao, cultivars bred or derivative from it, which accounted for 44.1％ in the same period of the total cultivars. Founder parents of bred cultivars after 1990s were Tengxi138, Shangyu397, Fushiguang, cultivars bred or derivative from them which accounted for 62.0％ in the same period cultivars. The core founder parent was Tengxi138, cultivars bred or derivative from it which accounted for 24.7％ in the same period of the total cultivars.%分析了黑龙江省审定的260个水稻品种的骨干亲本和20世纪90年代后育成品种的系谱.结果表明,20世纪90年代前育成品种的骨干亲本是石狩白毛、农林11号、虾夷,由它们育成或衍生品种占同期育成品种的83.3%,其中骨干核心亲本是石狩白毛,由它直接育成或衍生的品种数占同期育成品种总数的44.1%:20世纪90年代后育成品种的骨干亲本是藤系138、上育397、富士光,由它们育成或衍生品种占同期育成品种的62.0%.其中骨干核心亲本是藤系138,由它直接育成和衍生的品种数占同期育成品种总数的24.7%.
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