Breeding and resistance analysis of restorer line Shuangkangmingzhan resisting to rice blast and rice gall midge

Shuangkangmingzhan has been proven to contain gene Gm6 through detection by molecular marker.It is the progeny of Kangwenqingzhan,which carries Gm6 that repels rice gall midge,crossed with Duoxi 1.It is the restored line against rice blast and rice gall midge resulting from years of natural and spontaneous selection process in multiple locations.The resistance test on Shuangkangmingzhan and its hybrid combinations with rice gall midge showed no significant difference between them.However,a significant difference existed between the restored line Minghui 100 and its hybrid combination Jinyouming100,which had no resistance resource.Shuangkangmingzhan is the restored line with restoring ability to the indica rice CMS line.And Teyoumingzhan is hybridized between Shuangkangmingzhan and Longtepu A.When the two were hybridized the resultant rice strain showed high grain yield and moderate resistance to rice blast.