The Evaluation of Seed Germination on 12 Soybean Cultivars Under Different Salinity Stress Levels

摘要

In order to study effects of saline water on seed germination of various soybean cultivars, an experiment was conducted using completely randomized design with factorial method and three replications in 2012.The factors were salinity stress levels (A) (0, 30, 60 and 90) mM NaCl, soybean cultivars (B) (Including 12 seed cultivars of II and III maturity groups). Five traits including seed germination, seed vigor, dry weight of radical and, plumule and biologic yield were studied. The results of analysis of variance showed significant differences between cultivars on studied traits at 1 % level of significance. The highest biologic yield belonged to Hy-1 and Steel under 90 mM. It was belong to M9, Clark and Union under 60 mM and belonged to Hy-1, Halcor and Union under 30 mM.The results of comparison means using Duncan’s method showed L17 and Steel not only had the high seed germination and vigor but also they had dry weight of radicles and biologic yield than others. It was identified although Union, Elgine and Williams were in second grade on seed germination and vigor but they had considerable growth and dry weight. Based on display scatter plot with two STI and GMP indices, L17 and Elgine were placed in A region of plot under 30 mM NaCl, while they were in B region under 60 and 90 mM salinity stress. The cultivars such as Union and Hy-1 were in C region of mentioned scatter plot.