Evaluation of processing tomato seed quality using different vigor tests
Germination and vigor tests are essential components of seed quality control in seed companies. Vigor tests, though not required to meet the legislation, have been used by seed companies to evaluate the physiological quality of seed lots. In order to verify the efficiency of different vigor tests aimed to evaluate the physiological seed quality, two seed lots from three processing tomato cultivars ('Tospodoro', 'Viradoro' and 'Nemadoro'), from Embrapa Vegetables' breeding program were used in this study. The following tests were performed: germination, first count, accelerated ageing with the use of saturated NaCl solution, cold, seedling emergence, germination rate, loss of potassium, high and fresh and dry weight of transplants. The cold test and accelerated ageing led to a higher differentiation on seed vigor of seed lots from different cultivars. Pearson's (r) test of simple correlation coefficient also showed a highly positive correlation between the cold test, accelerated ageing and seedling emergence. The results from transplant production were not efficient to separate seed lot vigor. The results suggest the use of cold test and accelerated ageing test (72 h, 41°C) to assess the vigor of processing tomato seeds.
Silva, P.P., Freitas, R.A. and Nascimento, W.M. (2019). Evaluation of processing tomato seed quality using different vigor tests. Acta Hortic. 1249, 175-180
seed quality, tomato, vigor tests