Effect of seed size on germination and seed vigor of two soybean (glycin max L.) cultivars

ABSTRACT: In order to evaluate the effects of seed size on germination and seed vigor of two soybean cultivars, an experiment was carried out at seed technology laboratory of Islamic Azad University of Tabriz in 2008. This experiment was arranged out as factorial, based on CRD design with four replications. Treatments were three seed sizes (small, medium and large) and two soybean cultivars (Williams and TMS). Results showed that medium seeds had higher germination percentage than that for large and small seed sizes..Highest and lowest amount of root and shoot length, seedling length, and seedling dry weight belonged to medium and small seeds, respectively. But there was not a significant effect of seed size on germination rate.