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Advancing S4 to S5 Generation of Field Corn

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.

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

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

Abstract/ Executive Summary:

Forty three S₄ lines from commercial hybrid NK46 and twenty five S₄lines from Nath Samrat were advanced to S₅ generation in order to develop superior inbred line (s). Variation was found among the S₄ lines in each set for the characters studied. Selected S₄ plants were selfed. S₅ seeds from selfed plants were stored for advancing S₆ generation during the next season.

Keywords: Inbred, Field corn, Maize, Varieties

Location: RARS, Hathazari and RARS, Rahmatpur

Start Date: 00-00-2012

End Date: 00-00-2013

Program Area: Variety and Species

Commodity: Maize

Objectives:

To advance S₄ generation to S_5.

Methodology:

The experiment was conducted at two location namely RARS, Hathazari (Set I: NK46) and RARS, Rahmatpur (Set II: Nath Samrat) during rabi, 2012-13. Seeds were sown on 25 November (Set I) and 22 November (Set II), 2012 respectively. Each S₄ material was sown in one row with 5 m long plot. Spacing was 100 x 20 cm (one plant/hill). Fertilizers were applied @ 120, 80, 80, 20, 5 kg/ha of N, P₂O₅, K₂O, S and Zn respectively. Standard agronomic practices including irrigation were done to raise a healthy crop. Plant protection measures were taken as and when necessary. Selected plants were selfed. Selfmg was done by hand. Data on days to tasseling, days to silking, plant height (cm), ear height (cm) and no. of selfed ear harvested were recorded.

Source of Information: Annual Research Report 2012-13, Plant Breeding Division, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur, September-2013, pp: 14-17.

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

157 ears from Set I and 58 ears from Set II were selected and preserved separately for advancing S₅ to S₆ generation in the next year following ear to row method for developing selfed population.

Knowledge Management: Report/Proceedings