玉米苗期不同供水条件下穗部性状与产量的相关分析

Correlation Analysis of Grain Yield and Ear Characters of Maize during Seedling Stage with Different Water Supply

本试验在防雨棚中盆栽条件下进行。供试玉米杂交种5个,苗期设置正常供水、轻度干旱胁迫和中度干旱胁迫3个供水处理,拔节期均复水到正常供水水平。籽粒成熟后,对产量和主要穗部性状进行相关分析和通径分析。结果表明:正常供水条件下,百粒重对产量的影响较大;轻度干旱胁迫条件下,粒长和出籽率与产量关系最密切,通径分析表明轴粗对产量的贡献最大;中度干旱胁迫条件下,行粒数对产量的影响较大。

Pot experiment was carried out with 5 maize hybrids under three levels of water supply treatment（ light drought stress, modest drought stress and CK）during seedling stage in a rain shelter. And normal water treatment was recovered in the jointing stage. Correlation and path analysis on main ear characters and grain yield were studied in the harvest stage. The result indicated： Under normal water condition 100-grain weight was dominant in affecting grain yield. Under light water drought stress level the effect on grain yield of kernel length and produced grain percentage were important, path analysis indicated that the most contribution to the grain yield was corncob width. Under modest water drought stress level grains per row was dominant in affecting grain yield.