Studies on duration of vernalization, size and halving of steckling on phenology of sugar beet

In this research studies the effects of duration of vernalization¡ size and halving of steckling on bolting¡flowering and seed setting of sugar beet were studied by conducting three experiments. First and second experiments were conducted in 28 Dec. and 1st Feb. 2014 in glasshouse. Treatments were stecklings of HM5514¡ two levels of whole and sliced stecklings and four levels of size of stecklings. Experiment was conducted in CRBD. The 3rd experiment was conducted in 28 Dec. and 21 Feb. 2014 in field in split split plot design with 10 replications. Treatments were combination of three paternal HM5514¡ S1-24 and SB26 two levels of whole and sliced stecklings and three levels of size of stecklings. Results of 1st experiment showed that no bolting occurred in even 100 days after stecklings replanting. Bolting occurred in 2ndand 3rd experiments 50 and 29 days after stecklings replanting¡ respectively. In 2nd experiment negative correlation was exist between stecklings size and time to bolting. Where¡ in stecklings with crown diameter 3.13 and 6.24 cm bolting occurred 60 and 50 days after stecklings replanting¡ respectively. In 3rd experiment¡ stecklings with crown diameter 3.4 and 6.3 cm bolting occurred 32 and 29 days after stecklings replanting¡ respectively. So¡ when verbalization requirement were fulfilled¡ there was no correlation between stecklings size and time to bolting. Bolting was postponed by slicing of steckling.