S. N. Mozumder
Senior Scientific Officer
Regional Spices Research Centre, BARI, Gazipur
M. I. Haque
Senior Scientific Officer
Regional Spices Research Centre, BARI, Gazipur
S. Akter
Principal Scientific Officer
Regional Spices Research Centre, BARI, Gazipur
The experiment was conducted at the Regional Spices research Center, BARI during November, 2012 to April 2013 to create variability in existing onion germplasm through poly cross method. Seven onion genotypes were planted in the shape of equilibrium lattice design for 7 treatments with 20 replications and allowed to free cross among each other without any disturbance. All genotypes produced seeds having lots of variations in respect to number of umbels per plant, seeds per umbel as well as seed yield per plant. Exotic large (AC GAZ 001) genotype produced the maximum (12.5 g/plant) seeds while BARI Onion 3 produced minimum (3.44 g/plant) seeds.
IMPROVEMENT, ONION, POLY CROSS, VARIABILITY
Regional Spices Research Centre, BARI, Gazipur
Variety and Species
To develop variability in onion lines/varieties with longer shelf life and better yield potentiality.
The experiment was conducted at the Regional Spices research Center, BARI during Novemeber, 2012 to April 2013 to create variability in existing onion germplasm through poly cross method. To produce polycross seed, bulbs of 7 onion genotypes were planted in the shape of equilibrium lattice design for 7 treatments with 20 replications on 05 December, 2012. The land was fertilized with Cowdung 10 t/ha, Nitrogen 145 kg, Phosphorus 83 kg , Potasium 84 kg, Sulphur 20 kg, Zinc 3 kg and boron 2 kg per hectare. The entire quantity of cowdung, P, S, Zn, B, ¼ N and 1/3 K will be applied at the time of final land preparation. The rest N and K will be applied at 25-30, 50-55 and 70-75 days after planting. To study some agronomical characteristics, the polycross seeds produced from free pollination. Pollination was done by honey bees, some small flies and hand dusting Seeds were harvested at 05 April, 2013 from each plot separately and processed seeds were stored.
Annual Research Report 2012-13, Spice Research Center, BARI, Shibganj, Bogra
12,000/--
Collected onion bulbs were different in size, shape and bulb weight. Bulb color varied from brick red to dark red. All genotypes flowered well and produced seeds. Larger bulbs produced more number of flower stalk as well as umbels per plant compared to tiny bulbs. The maximum 250 g seed produced at the rate of 12.5 g/plant from 20 plants of exotic large (AC GAZ 001) where larger bulbs were planted. BARI Onion 3 gave the minimum 40 seeds from 13 active plants. BARI Onion4 produced comparatively bolder seeds (4.30g/1000) and BARI Onion 3 has smaller (3.44g/1000) seeds.
Report/Proceedings