A novel thermo/photoperiod-sensitive genic male-sterile (T/PGMS) rice mutant with green-revertible albino leaf color marker induced by gamma irradiation
2003
Wu, Dianxing | Shen, Shengquan | Cui, Hairui | Xia, Yingwu | Shu, Qingyao
A series of leaf color mutants were induced through treatment with 300 Gy cobalt gamma rays from the indica rice cultivar 'Pei'ai 64S', the best thermo/photoperiod-sensitive genic male-sterile (T/PGMS) line commercially used in two-line hybrid rice production. One elite mutant labeled 'a-18' with a single recessive gene controlling albino marker was found to express albino leaves at the 1-3-leaf stage and reverted back to normal green color before transplanting. Despite weaker seedling growth, the mature mutant plant possessed mostly similar agronomic traits, physicochemical properties, specific combining ability, and T/PGMS characteristics as the original parent. The albino seedlings were easily distinguished from normal green seedlings and their survival rate under field condition was significantly lower than that of hybrid seedlings. These results suggested that the green-revertible albino mutation can be used as a phenotypic marker for monitoring seed purity in hybrid rice production.
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