A green-revertible albino leaf mutant was found in an indica rice variety, Yixiang B, in the field. A stably inherited mutant with green-revertible albino leaf was obtained after five successive generations of self-crossing, and temporarily named as gra. The leaf color of gra was albino before 4th leaf stage, and then gradually turned green. As the content of chlorophyll in leaves increased from 4-week-old to 12-week-old seedlings, the ratio of mutant/wild chlorophyll content in rice leaves rose from 34.5 ％ to 99.4 ％. Genetic analysis of F2 populations showed that the mutation was controlled by a single recessive nuclear gene. The gene was finely mapped between the SSR markers RM25522 and RM25535, with genetic distances of 0.05 cM to each marker, respectively, and a physical distance of 136 kb.%在水稻品种宜香B中发现了一个白化转绿叶突变体,经过多代自交获得了稳定的白化转绿叶色突变体.该突变体在4叶期前叶色为黄绿色,之后逐渐变绿,从苗龄4周到12周,突变体/野生型叶绿素含量比值从34.5%逐渐升高到99.4%.遗传分析表明该突变受1对隐性核基因控制,暂命名为gra.利用微卫星标记将gra初步定位于第10染色体标记RM596和RM5620之间,进一步利用极端个体定位法把gra精细定位于标记RM25522和RM25535之间.gra基因距RM25522和RM25535标记的遗传距离均为0.05 cM, 其物理距离约为136 kb.
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