水稻(Oryza sativa L.)叶形和叶色直接影响光能利用,最终影响其产量和品质,是水稻重要的农艺性状.通过甲基磺酸乙酯诱变籼稻缙恢10号发现了1个遗传稳定的水稻条纹窄叶突变体,暂命名为nsl1.nsl1在苗期叶片呈浅白色,拔节期后出现平行于叶脉分布的白色条纹,而且其叶片显著窄于野生型缙恢10号.nsl1突变体的白色条纹部位细胞内部叶绿体严重解体,叶绿素含量显著下降.荧光参数F0,Fv/Fm,?PSⅡ,qP和ETR均显著低于野生型,光合效率显著降低.nsl1的叶形叶色及生理的变化最终引起nsl1突变体株型矮小和产量相关性状的明显减小.该条纹窄叶性状受一对单隐性核基因控制,被定位于第3染色体长臂InDel 16与InDel 12之间,物理距离为204 kb,在该区域尚未发现与已报道的叶色或窄叶相类似的基因.本研究为NSL1基因克隆和功能分析奠定了良好基础. Rice (Oryza sativa L.) leaf shape and leaf color directly affect the utilization of light energy, and ultimately affect the yield and quality of rice is an important agronomic trait of rice.With methyl ethyl sulfonate indica rice Jinhui 10 found a Genetically stable rice striped narrow-leaf mutant, tentatively named nsl1.nsl1 at seedling stage leaves were pale white, parallel to the vein after jointing appeared white stripes, and its leaves were significantly narrower than the wild-type Jinhui 10 .nsl1 The chloroplasts in the white streaks of the mutants were severely disintegrated and the content of chlorophyll decreased significantly.The fluorescence parameters F0, Fv / Fm, PSⅡ, qP and ETR were significantly lower than those in the wild type, and the photosynthetic efficiency was significantly decreased. Physiological changes eventually led to the shortening of plant type and yield-related traits in nsl1 mutant.The narrow-leaf trait was controlled by a pair of single recessive nuclear genes and was mapped between InDel 16 and InDel 12 on chromosome 3 , And the physical distance was 204 kb, no similar gene was found in this region as the reported leaf color or narrow leaf.The present study laid a good foundation for the cloning and functional analysis of NSL1 gene.