Development of red giant embryo rice by molecular marker-assisted selection

In this study,we successfully developed a new rice (<i>Oryza Sativa</i> L.) strain of red giant embryo rice "Shangshida No. 10" by hybridizing a normal embryo red rice "Shangshida No. 6" with a giant embryo white rice "Shangshida No. 5" and backcrossing with "Shangshida No. 5",together by molecular marker-assisted selection. There was no significant difference in the weight per plant between "Shangshida No. 5" and "Shangshida No. 10",but the yield of "Shangshida No. 10" was significantly higher than that of "Shangshida No. 5" as shown in field trials,while growth duration of "Shangshida No. 10" was approximately 4~5 days shorter than that of "Shangshida No. 5". In addition,weight ratio of embryo to brown rice of "Shangshida No. 10" was lower than that of "Shangshida No. 5",while there was no significant difference in the volume ratio of embryo to brown rice between "Shangshida No. 10" and "Shangshida No. 5". The successful development of the new rice strain "Shangshida No. 10" has laid a solid foundation for the further market development and application of red giant embryo rice