The lightsensitive redroot mutant, designated as HG1, was newly observed in an indica rice variety, Nankinkodo, when the roots were exposed to natural light under hydroculture conditions. The root color of the mutant began to turn slightred when the roots were exposed to the light at the intensity of 29 μmol/（m2·s）, and turned darkred at 180 μmol/（m2· s）, which suggested that the root color of the mutant was very sensitive to light. Furthermore, genetic analyses showed that the character of lightsensitive redroot in the HG1 mutant was controlled by a single dominant gene, tentatively designated as Lsr. With the SSR markers, Lsr gene was mapped between RM252 and RM303 on chromosome 4 with the genetic distances of 9.8 cM and 6.4 cM, respectively. The results obtained from the study could be useful for fine mapping and cloning of Lsr gene in rice.
ZHANG Junzhi,LIU Xiao,LI Chao et al. Genetic Analysis and Molecular Mapping of LightSensitive RedRoot Mutant in Rice (Oryza sativa)[J]. , 2008, 22(6): 578-578～582 .
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