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Position: Home > Articles > Genetic analysis and molecular mapping of light-sensitive red-root mutant in rice. Rice Science 2009,16 (1) 27-32

Genetic analysis and molecular mapping of light-sensitive red-root mutant in rice.

作者：

Zhang JunZhi;Liu Xiao;Li Chao;Xiao Ke;Dong YanJun

单位：

Laboratory of Plant Genetics and Functional Genes; College of Life and Environmental Sciences; China; Shanghai Normal University; Shanghai 200234

关键词：

chromosomes;cultivars;gene mapping;genes;genetic analysis;genetic distance;light;mutants;mutations;rice;roots;seedlings;simple sequence repeats;Oryza;Oryza sativa

摘要：

The light-sensitive red-root mutant, designated as HG1, was newly observed from an indica rice variety, Nankinkodo, when seedlings were grown with roots exposed to natural light. The root color of the mutant began to turn slight-red when the roots were exposed to the light at the intensity of 29 micro mol/(m².s), then turned dark-red at the light intensity of 180 micro mol/(m².s), suggesting that the root color of the mutant was evidently sensitive to light. Furthermore, genetic analysis showed that the character of light-sensitive red-root of the HG1 mutant was controlled by a single dominant gene, tentatively designated as Lsr. With simple sequence repeat markers, Lsr gene was located between the markers RM252 and RM303 on chromosome 4 with the genetic distances of 9.8 cM and 6.4 cM, respectively. These results could be useful for fine mapping and cloning of Lsr gene in rice.

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Genetic analysis and molecular mapping of light-sensitive red-root mutant in rice.

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