Radicle emergence test predicts normal germination percentages of onion seed lots with different cultivars and genotypes

Authors : İbrahim DEMİR, Eren ÖZDEN, Zeynep GÖKDAŞ, Ebrima S NJİE, Mine AYDİN

Pages : 434-442

Doi:10.37908/mkutbd.697450

View : 30 | Download : 10

Publication Date : 2020-12-18

Article Type : Research Paper

Abstract : Aims: To test radicle emergence count in order to predict normal germination percentages of onion lots. Methods and Results: This work was conducted to test the potential for 2 mm radicle emergence insert ignore into journalissuearticles values(RE); to predict normal seed germination percentages of 20 onion seed lots. In the first stages of the study RE counts at 72, 76 and 80 h were highly predictive insert ignore into journalissuearticles values(p<0.001, R2=0.94-0.95); of normal germination after 12 days. In the second stage, the regression formula insert ignore into journalissuearticles values(y=45.9+0.52x); developed for the 80th hour radicle emergence to predict normal germination of 20 seed lots at various aging levels collected from the market. RE counts insert ignore into journalissuearticles values(%); of the 20 lots at 80 h were used to predicted values by using the formula. Actual normal percentages of 20 lots were determined after 12 days of germination testing. Then regression analysis was performed on both values. Results showed that predicted and actual normal germination percentages were highly related to actual normal germination percentages insert ignore into journalissuearticles values(R2=0.95, p<0.001);. Means of the predicted insert ignore into journalissuearticles values(79.6%); and actual insert ignore into journalissuearticles values(80.4%); values were very similar. Results indicated that RE testing has a potential to estimate normal germination percentages of onion seed lots. Conclusions: RE count at 80h was highly related to normal germination percentages after 12 days insert ignore into journalissuearticles values(p<0.001, R2=0.95); in commercial onion seed lots. Significance and Impact of the Study: RE testing can be used in the prediction of normal germination percentages of any commercial onion seed lots within a short period, rather than waiting until the final count insert ignore into journalissuearticles values(12  days); in onion germination tests.
Keywords : germination test, commercial onion seed lots, seed ageing