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Creation of Genetic Variability in Onion

M N A Chowdhury
Senior Scientific Officer
Spices Research Center,BARI, Shibganj, Bogra

, R Ara
Senior Scientific Officer
Spices Research Center,BARI, Shibganj, Bogra

M S Alam
Senior Scientific Officer
Spices Research Center,BARI, Shibganj, Bogra

M M Hossain
Scientific Officer
Spices Research Center,BARI, Shibganj, Bogra

B Sarkar
Scientific Officer
Spices Research Center,BARI, Shibganj, Bogra

Abstract/ Executive Summary:

The experiment was conducted at Spices Research Centre, Shibganj, Bogra during rabi season (2012-2013) to create the genetic variability in onion for future breeding program. The F1 bulbs (viz. BP-5x BP1,BP-5xBP-2, BP-5xBP-3, BP-5xBP-4, BP-3xBP-1, BP-3x BP-2, BP-3xBP-4, BP-3x BP-5BP-2xBP-1, BP-2x BP-3, BP-2xBP-4, BP-2x BP-5) were used in this study. Good seed settings were observed in all the crosses. Matured F₂seeds were harvested and stored in refrigerator for further study.

Keywords: CREATION, GENETIC, ONION, VARIABILITY.

Location: Spices Research Center,BARI, Shibganj, Bogra

Start Date: 01-11-2012

End Date: 30-04-2013

Program Area: Variety and Species

Commodity: Onion

Objectives:

To develop genetic variability in onion for future breeding program.

Methodology:

The experiment was conducted at Spices Research Centre, Shibganj, Bogra during rabi season (2012 -2013) to create genetic variability in onion. The crossing materials were BARI Onion-1 & 4 (winter type) and 2, 3 & 5 (summer type). BARI Onion-1 & 4 has good keeping quality but low yield compare to summer onion. BARI Onion-2, 3 & 5 is high yielding variety but keeping quality very low than winter onion. The crossed F₁ bulbs (viz. BP-5x BP1,BP-5xBP-2, BP-5xBP-3, BP-5xBP-4, BP-3xBP-1, BP-3x BP-2, BP-xBP-4, BP-x BP-5BP-2xBP-1, BP-2x BP-3, BP-2xBP-4, BP-2x BP-5) were used. The crops were planted on 20 November 2012 and seeds were harvested on 28 April 2013. The plot size was 1 m x 1 m having plant spacing of 25 cm x 20 cm. Onion was fertilized with recommended dose of cow dung 10 t/ha, N115, P54, K75, S20, Zn3 and B2 Kg/ha. Weeding was done at 25, 50, 75 & 100 days after planting. Irrigation was applied at 20, 40, 60, 80 & 100 days after planting. Fungicide (Ruvral @ 2.5 g/l) was sprayed at 15 days interval starting from 60 day after planting. Insecticide (Admare @ 0.5 ml/l) was sprayed at 15 days interval starting from 90 day after planting. Artificial pollination was done by insect within the net. At maturity, the mature seeds were harvested. Data were collected on total amount of seed from different crossing materials and germination percentage.

Source of Information: Annual Research Report 2012-13, Spice Research Center, BARI, Shibganj, Bogra

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

In the study, it was noted that bulb of all crosses showed good seed settings. At maturity, seeds were harvested, processed and kept in refrigerator for further study. Crossing of BARI Onion-2 with BARI Onion- 5 resulted the highest yield (62.80g) and germination percentage (85). Similarly crossing of BARI Onion-5 with BARI Onion- 1 also produced higher seed yield (59.70g) and germination percentage (80).

Knowledge Management: Report/Proceedings