作物学报 ›› 2018, Vol. 44 ›› Issue (9): 1301-1310.doi: 10.3724/SP.J.1006.2018.01301
龙海馨(),邱海阳,MuhammadUZAIR,房静静,赵金凤,李学勇()
Hai-Xin LONG(),Hai-Yang QIU,UZAIR Muhammad,Jing-Jing FANG,Jin-Feng ZHAO,Xue-Yong LI()
摘要:
叶片作为植物光合作用的主要器官, 其面积的大小影响着光能利用率和最终产量。为了研究水稻叶片形态建成的分子机制, 利用 60Co-γ射线诱变粳稻品种春江06, 在M2代中得到1份窄叶突变体, 命名为narrow leaf20 (nal20)。该突变体叶片变窄、株高降低、分蘖增多、茎节间缩短、抽穗期提前。本研究重点调查了3片功能叶的形态, 发现突变体叶片宽度减少了50%, 叶片长度变化较小。细胞学观察表明, 叶片变窄主要是由于表皮细胞数目的减少, 而细胞大小变化不大。遗传分析表明, 该突变体表型受1对隐性基因控制。利用具有多态性的InDel分子标记及nal20与Dular配制的F2定位群体, 将该基因定位于第7染色体着丝粒区1.9 Mb范围内。二代测序结果表明, 在该范围内有455 kb的大片段缺失。本研究结果为窄叶基因NAL20的克隆和功能分析奠定了良好基础, 也为水稻株型改良提供了基因资源和育种材料。
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