摘要： 1993～1994年研究了田间生长条件下5个玉米杂交种棒3叶的光合强度（Pa）、比叶重（SLW）、叶氮量（NLA）、叶肉厚度（LT）、气孔密度（SF）、维管束密度（VBF）等光合性状。结果表明：（1）各杂交种棒3叶的Pa高峰均出现在吐丝期，不同杂交种从吐丝期到成熟期的Pa动态变化不同，SLW、NLA的动态变化趋势相似。（2）不同玉米杂交种的Pa、SLW、NLA、LT、SF、VBF表现差异显着。（3）玉米吐丝期棒3叶的SLW、NLA、LT、SF、VBF与Pa均呈显着正相关，对棒3叶Pa的贡献是：NLA>SLW>LT>SF>VBF。（4）Pa、SLW、NLA、MF属于数量性状遗传，SF、VBF属于质量性状遗传。

关键词: 玉米, 棒3叶, 光合性状, 相关性

Abstract: Apparent photosynthetic rate(PR),specific leaf weight (SLW),nitrogen contents of leaf(NCL),leaf thickness(LT),stomatal density (SD) and vascular bundle density(VBD) were determined for three ear leaves of corns that grew in a field in 1993-1994.The results showed:(1)dynamic change of different hybrids varied from silking stage to maturity, the tendency of SLW and NCL was similar;(2)the difference of PR,SLW,NCL,LT,SD and VBD was significant for different hybrids;(3)SLW,NCL,LT,SD and VBD of three ear leaves were positively correlated with PR at silking stage, the contribution of which to three ear leaves was NCL>SLW>LT>SD>VBD;(4)PR,SLW,NCL and LT belonged to quantitative heredity, SD and VBD belonged to qualitative genetics.

Key words: Corn, Three earleaves, Photosynthetic character, Correlation

中图分类号: 

• S513.01