在水稻(Oryza sativa)品种台中65的组培后代中发现一个花器官发育异常突变体flower organ number6(fon6),其主要表型为:双子房,多柱头,7-8枚雄蕊。遗传分析表明,该突变表型由一对隐性基因控制。以该突变体与籼稻3037杂交的F2代分离群体作为定位群体,利用STS标记将与突变性状相关的基因定位于第6染色体短臂上STS标记PL4和PL5之间约480kb的范围内。该研究结果为进一步的基因克隆及功能研究奠定了基础。 A flower organ number 6 (fon6) mutant was found in tissue culture progeny of Taichung65, a variety of rice (Oryza sativa). Its main phenotypes were: twin ovary, multiple stigma and 7-8 stamens. Genetic analysis shows that the mutant phenotype is controlled by a pair of recessive genes. Using F2 segregating population of indica rice 3037 crossed with this mutant as the locating group, the STS marker was used to locate the mutation-related gene in the range of about 480kb between STS markers PL4 and PL5 on the short arm of chromosome 6. The results laid the foundation for further gene cloning and functional studies.