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Rice panicle length is a quantitative trait controlled not only by genetic factorsbut also by environment conditions, especially by nitrogen supply level. It issupposed that genes of rice panicle length could be fully expressed under suffi-cient N supply and be restricted by low N stress. Determination of QTL×N-level interaction associated with the rice panicle length would be helpful forrevealing the genetic basis of rice N efficiency at low N level. This study was toidentify QTLs for rice panicle length in a doubled haploid (DH) population un-der two N levels, and to search for evidences on the genetic basis of nitrogen
It issupposed that genes of rice panicle length could be fully represented under suffi-cient N supply and be restricted by low nitrogen stress. Determination of QTL × N-level interaction associated with the rice panicle length would be helpful for regeneration of the genetic basis of rice N efficiency at low N level. This study was to identify the QTLs for rice panicle length in a double haploid (DH) population un-der two N levels, and to search for evidences on the genetic basis of nitrogen