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本文利用由 98个家系组成的 Nipponbare/ Kasalath/ / Nipponbare回交重组自交系 (backcrossinbred lines,BIL s)作图群体 (BC1 F9)和混合线性模型的 QTL 定位方法 ,联合分析南京、合肥和海南 3个不同地点的水稻抽穗期 QTL 及QTL 与环境互作。检测到 8个抽穗期 QTL,分别位于第 1、 2、 3、 4、 6、 7、 8染色体上 ,其中 ,第 3染色体上有 2个QTL。单个 QTL 的加性效应大小范围为 1.46天～ 4.5 8天 ,对性状的贡献率在 1.49%～ 12 .2 %之间 ,加性效应总的贡献率为 34 .13%。有 6个 QTL 与环境存在显著互作 ,单个 QTL 与环境互作效应的贡献率在 2 .18%～ 15 .84%之间 ,互作效应总的贡献率为 41.11% ,大于加性效应的总贡献率。位于第 4、 6和 7染色体的 3个 QTL 在 3个不同地点均与环境存在显著互作 ,并且 ,在南京和合肥的互作效应均使抽穗期延长 ,在海南的互作都使抽穗期缩短 ,表现感光性特征。对抽穗期 QTL 检测的稳定性进行了分析
In this study, QTL mapping methods of Nipponbare / Kasalath / Nipponbare backcross inbred lines (BILs) mapping population consisting of 98 pedigrees were used to map population (BC1 F9) and mixed linear models. QTLs and QTLs at rice heading stage interacted with the environment in three different locations. Eight QTLs for heading date were detected on chromosomes 1, 2, 3, 4, 6, 7 and 8, respectively. Among them, two QTLs were found on chromosome 3. The additive effect range of single QTL ranged from 1.46 days to 4.58 days, with the contribution rate of traits ranging from 1.49% to 12.2%, and the total contribution rate of additive effect was 34.13%. Six QTLs interacted significantly with the environment. The contribution rates of individual QTLs to environment interaction ranged from 2.18% to 15.84%, and the overall contribution rate of interaction effects was 41.11%, which was greater than the additive effect The total contribution rate. The three QTLs located on chromosomes 4, 6 and 7 all interacted significantly with the environment in three different locations, and the interaction effect in Nanjing and Hefei both prolonged the heading time. In Hainan, the interaction resulted in the heading stage Shorten the performance of the photosensitive characteristics. The stability of QTL detection at heading stage was analyzed