By using the recessive white population made of 182 plants and 397 SSR primers, one pigment key gene was first found tightly linked to the RM212 on chromosome 1, and genetic distance is 9.6cM.

• 构建了F2分离群体，同时对F3的米色进行米色统计，选取F2中182株纯隐性植株(白米株)和397个SSR引物对米色色素基因进行了粗略定位，其中第1染色体上的RM212与目的基因紧密连锁，遗传距离是9.；6cM。