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Production of Pop Corn Test Crosses for Evaluation of Inbred Lines in Early Generation (set Ii)

M. Amiruzzaman
Plant Breeding Division, Bangladesh Agricultural Research Institute Joydebpur, Gazipur-1701.

M.N. Amin
Plant Breeding Division, Bangladesh Agricultural Research Institute Joydebpur, Gazipur-1701.

Abstract/ Executive Summary:

Pop corn test crosses were made through lines (40 S₁ line) x testers (2) mating system. Forty S₁ lines of popular hybrid Pop corn Burst were crossed with two testers Thai pop corn and Khoibhutta in order to preliminary selection of superior inbred lines in early generation testing. Total 80 pop corn test crosses were made and seeds were preserved for next year test cross evaluation.

Keywords: Evaluation, Inbred lines, Pop corn

Location: BARI, Joydebpur

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Maize

Objectives:

To find out heterotic patterns and heterotic partners of pop corn inbred lines.

Methodology:

The experiment was consisted of 40 S₁ lines of popular pop corn hybrid Pop corn Burst and 2 testers as Thai pop com and Khoibhutta. Seeds of the 40 S₁ lines were sown on November 16, 2009 at BARI, Joydebpur. For synchronization of flowering two testers were sown on 16 and 21 November, 2009. Each inbred line was sown in one row plot with 5m long and each tester was sown in 5 rows plot with 5m long. Spacing was maintained at 75cm x 20cm (one plant/hill). After every 2 rows l.5 m spacing was maintained for easy movement. Fertilizers were applied @ 120, 80, 80, 20 and 5 kg/ha of N, P₂O₅, K₂O, S and Zn, respectively. Standard agronomic practices were followed to raise good crop. Undesirable plants from the lines were rouged out before flowering. Selected plants of each line were crossed with each tester to produce enough F₁ seed. Test crosses were made by hand. Ethyl alcohol was used for hand washing during crossing. At the same time maintenance of the pop corn lines and pop corn testers through selfing were also done.

Source of Information: Annual Research Report 2009-2010, Maize and Barley Improvement Program, July 2010, pp: 34-35

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Eighty test crosses were produced through crossing of 40 S₁ lines x 2 testers. After harvesting, a final selection was done, and seeds stored for test cross evaluation for the next season. The amount of seed produced from different pop corn test crosses are presented. Some important parameters on different statistical aspects are also presented.

Knowledge Management: Report/Proceedings