Transduction of Gall Midge Resistance Gene,Gm6,for Rice using Sanming Dominant Genic Male Sterile Rice as Vector

Transduction of the gall midge resistant gene,Gm6,for rice using the new germplasm resource of Sanming dominant genic male sterile(SMDGMS)rice was studied.Kanwenqingzhan as the donor and SMDGMS rice as the vector,Gm6 was introduced into the rice three-line maintainer line,Yuanfeng B,by successive backcrosses.The result indicated that the pure lines of BSC9246 with Gm6 gene similar to Yuanfeng B in fingerprint and agronomic traits had been selected from the fertile plants of BC5F1.By using Yuanfeng A as the cytoplasmic donor,the three male sterile lines,BSC9247,were bred through successive backcrosses with the heterosis basically identical to Yuanfeng A.This appeared to be an efficient facile method that could not only eliminate the need of the removal of male plants,but also ensure the purity of each generation of the hybrid seeds.