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Production of Single Cross Maize Hybrids

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

S. R. Dey
Plant Breeding Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701.

S. Begum
Plant Breeding Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701.

K. C. Saha
Plant Breeding Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701.

A. H. Akhi
Plant Breeding Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur-1701.

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

Abstract/ Executive Summary:

Two sets of maize single crosses were made following 8 x 8 and 7 x 7 diallel fashion excluding. reciprocals to generate 28 and 21 F₁'s respectively. The parents were mainly selected based on diversity studies in order to develop high yielding hybrids with desirable characters. The produced two sets of single crosses would be evaluated in the next rabi season.

Keywords: Production, Single cross, Maize, Hybrid

Location: Plant Breeding Division, Bangladesh Agricultural Research Institute

Start Date:

End Date:

Program Area: Variety and Species

Commodity: Maize

Objectives:

To develop high yielding hybrids with desirable characters.

Methodology:

Based on genetic diversity (morphological and molecular), yield and some other important characters 2 sets (8 x 8 and 7 x 7) inbreds were selected for hybridization program. Inbreds of each set were crossed by hand in a diallel fashion excluding reciprocals to produce 28 and 21 F₁s in each set respectively. Seeds of inbred lines of each set were sown in three different dates (14, 17, and 22, August, 2012) for synchronization. Each inbred line was sown in two row plot with 5m long. Spacing was maintained at 100 cm x 20 cm (one plant/hill). Fertilizers were applied @ 120, 80, 80, 20, 5 and 1 kg/ha of N, P₂O₅, K₂O, S, Zn and B respectively. Standard agronomic practices were followed to raise good crop. Undesirable plants from the each line were rouged out before flowering. Crossing was made by hand pollination in desirable plants and lines of each set to fulfill the desired combinations. Ethyl alcohol was used for hand washing during crossing. At flowering time, female and male organ (silk & tassel) of the plants of female and male parents were covered by special silk and tassel bag. At the same time maintenance and seed increase of the inbred parents were done. After maturity crossed cobs will be harvested, dried, shelled and preserved for field trial.

Source of Information: Annual Research Report 2012-13, Plant Breeding Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, September-2013, pp: 95-97.

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The produced 28 F₁s and 21 F₁s seed from two sets of crossing were harvested and processed carefully. After processing the seeds were kept separately and stored for for further evaluation.

Knowledge Management: Report/Proceedings