《Table 1–Heading dates (HD) in the rice populations.》

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《Minor-effect QTL for heading date detected in crosses between indica rice cultivar Teqing and near isogenic lines of IR24》

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SD，standard deviation；CV，coefficient of variation.aPlants were grown from May to Sep.at Hangzhou，and from Dec.to Apr.of the next year in the following year at Lingshui.bThe TI population was constructed from crosses between Teqing and near isogenic line

Rice populations were grown in paddy fields at the experiment stations of the China National Rice Research Institute located at either Hangzhou in Zhejiang province or Lingshui in Hainan（Table 1）.During the floral transition period the day length was longer than 13.5 h at Hangzhou and shorter than 12.5 h at Lingshui，corresponding to natural long-day（NLD）and short-day（NSD）conditions，respectively[26].There was no replication of S1plants in the ZC9 and ZC12populations.For other populations the experiments followed a randomized complete block design with two replications.In each replication，one line was grown as a single row of 12 plants.Seedlings at about 25 days post sowing were transplanted at a planting density of 16.7 cm×26.7 cm in all the trials.Field management followed the normal agricultural practices.