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以中优早8号×丰锦籼粳交组合衍生的水稻重组自交系的167个株系及其亲本为材料,在正常施氮和不施氮2种处理下对其每穗总粒数、穗长、单株有效穗、结实率、千粒重和单株产量6个产量相关性状进行比较分析和相关QTL定位,结果表明,在不施氮条件下每穗总粒数、穗长、单株有效穗和单株产量可作为水稻耐低氮材料的筛选指标;在2种氮处理下共定位到11个产量相关性状QTL,表型贡献率为3.84%~22.47%,其中2个QTL在2种氮水平下同时检测到。此外,还定位到2个氮肥农学利用效率QTL,表型贡献率分别为7.54%和6.67%。
167 lines of rice recombinant inbred lines derived from Zhongyouzao 8 × Fengjin indica × Japonica cross and their parents were used as materials to study the effects of two treatments on the total grains per panicle , Panicle length, effective panicle per plant, seed setting rate, 1000-grain weight and yield per plant were compared and the related QTLs were mapped. The results showed that under the condition of no nitrogen application, the total grains per panicle, panicle length, Effective spikes and single plant yield could be used as screening indicators for low nitrogen tolerance of rice. The QTLs for 11 yield-related traits were mapped to 11 yield-related traits under the two nitrogen treatments with a phenotypic contribution rate of 3.84% -22.47%, of which 2 were QTLs Nitrogen levels were detected simultaneously. In addition, two QTLs for agronomic efficiency of nitrogen fertilizer were also mapped, with phenotypic contribution rates of 7.54% and 6.67%, respectively.