Comparison of the best seed vigor test for prediction of seedling emergence and grain yield in rapeseed

In order to comparison of the best seed vigor test for predicting of seedling emergence as well as their relationship with grain yield in rapeseed, a study was conducted using 9 rapeseed cultivars (Option500, Excell, PF7045.91, Peace, Cyclone, Quantum, Q2, Golliath and Hyola401). Laboratorial tests such as germination, seed deterioration and seedling growth tests were carried out using completely randomized design and field experiment as randomized complete blocks in Agricultural Science and Natural Resources at Gorgan University in 2004–2005. The results showed that germination velocity (germination test) had the highest relationship with seedling emergence in field and the equation estimated 84% of variation in prediction of seedling emergence using linear regression. The results obtained from variable option in the mode of stepwise procedure showed that only germination velocity at germination test had significant effect in prediction of seedling emergence in field. Thus this factor can be used for prediction of rapeseed seedling emergence in field. The results also showed that the correlation between seed vigor (rapid, uniformity and germination percentage) with grain yield was not significant when optimum plant density was present in the field.