QTL analysis on stomatal trait of flag leaf in rice.

To understand the genetic mechanism of stoma related traits,an F10population derived from a cross between a tropical japonica rice(Akihikari)and an indica rice(Qishanzhan)was used to analyze QTLs controlling the stoma related traits.Nine QTLs for stoma related traits were detected.Four putative QTLs(qSD-1,qSD-4,qSD-7,qSD-8)controlling stomatal density were located on chromosomes 1,4,7and 8,with the explained variance of 7.2%,8.1%,9.1%and 5.9%,respectively.Two QTLs(qSL-4,qSL-6)for stomatal length were detected on chromosomes 4and 6,with the explained variance of 6.6%and 10.5%,respectively.Three QTLs(qSW-5,qSW-7,qSW-10)for stomatal width were detected on chromosomes 5,7and 10,with the explained variance of 12.4%,9.7%and 5.6%,respectively.All the eight QTLs except qSD-1 were not previously reported.qSD-4 on chromosome 4controlling stomatal density was overlapped with the QTL of photosynthetic rate which was detected before.