一个水稻高叶绿素突变体的鉴定与遗传分析

在水稻中花11的辐射诱变库中,筛选到1个深绿色突变体（ZM1120）。该突变体的茎、叶颜色较野生型对照深（绿）;在播种后第60、90天,突变体的叶绿素a含量比野生型分别高16.0%和7.2%,类胡萝卜素含量比野生型分别高23.1%和24.2%,播种后第90天突变体的净光合速率和蒸腾速率比野生型分别高16.3%和11.4...

IDENTIFICATION AND GENETIC ASSAY OF A HIGH-CHLOROPHYLL-CONTENT MUTANT IN RICE

A deep green rice mutant ZM1120 was screened from the γ-rays irradiation mutation library of Zhonghua 11. Compared to the wild-type control, this mutant were darker (greener) in shoots and leaves, and after sowing 60 and 90d, the content of chlorophyll were increased by 16.0% and 7.2%, respectively, and the content of carotenoid also increased by 23.1% and 24.2%, respectively. After sowing 90d the net photosynthetic rate and transpiration rate were increased by 16.3% and 11.4%, respectively. The agronomical traits of this mutant were significantly changed, and the traits of plant height, flag-leaf length, flag-leaf width, tiller number per plant, panicle length and setting rate decreased, but the grain length and 1000-grain weight increased by 7.9% and 2.6%. Genetic analysis revealed that the mutation phenotype was controlled by a single recessive nuclear gene, and further cloning and function assay will be useful for understanding the mechanism of photosynthesis and for rice breeding in future.