关键词:水稻; 黄绿叶; 基因定位; 遗传分析 Genetic Analysis and Gene Mapping of a Yellow-green Leaf Mutant in Rice CHU Zhi-Zhan1, GUO Hai-Bin2, LIU Xiao-Lin3, CHEN Yuan-Ling1, LIU Yao-Guang1,* 1 College of Life Sciences, South China Agricultural University / State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangzhou 510642, China
2 Center of Experimental Teaching for Common Basic Course, South China Agricultural University, Guangzhou 510642, China
3 Yichun University, Yichun 336000, China
Fund:This study was supported by the Open Fund Project of State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources (SKL-CUSAb-2013-04), the Science and Technology Program from Education Department of Jiangxi Province (GJJ14707), and the Natural Science Fund of Guangdong Province-the Launch Program for Doctor (2015A030310485) AbstractA yellow-green leaf rice mutant, temporarily named as ygl8951 (yellow-green leaf 8951), was identified from60Co γ- ray radiation mutation in japonica rice variety Nipponbare. The mutant showed albino phenotype from germination to 3-leaf-stage, then turned yellow-green phenotype till apoptosis. The contents of chlorophyll and carotenoid were obviously decreased in ygl8951 compared with the wild type. Electron microscope observation showed that no grana thylakoids but some stroma thylakoids-like structures were found in chloroplast of ygl8951 mutant. The expression levels of some genes involved in photosystem I and photosystem II were dramatically decreased, while the ribosomal and RNA polymerase genes in chloroplast were increased in ygl8951 mutant compared with the wild type. Mapping-based cloning was used to identify the ygl8951 locus using an F2 population from a crossing between the mutant and Huanghuazhan. The result showed that the mutated locus was located in a 191 kb region on chromosome 6, which was assumed to be a new gene controlling leaf color.
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