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Combining Ability Study in Waterlogged Tolerant Maize (zea Mays L.)

M. N. AMIN
Scientific Officer
Plant Breeding Division, Bangladesh Agricultural Research Institute (BARI), Gazipur

M. AMIRUZZAMAN
Principal Scientific Officer
Plant Breeding Division, BARI, Gazipur

A. AHMED
Scientific Officer
Plant Breeding Division, BARI, Gazipur,

M. R. ALI
Chief Scientific Officer
Plant Breeding Division, BARI, Gazipur, Bangladesh.

Abstract/ Executive Summary:

Combining ability was studied for kernel yield and yield components in a 8×8 diallel cross of waterlogged tolerant maize. Significant general and specific combining ability variances were observed for all the characters studied. Additive genetic variance was preponderant in plant height, ear height, ear length, ear diameter, and kernel weight and non-additive gene action was involved in days to silking, number of kernels per ear and kernel yield. The parental lines E-31 and E-79 were found to be the best general combiners for yield. The good combining parents for different traits could be used in hybridization to improve yield and other desirable traits as donor parents for the accumulation of favourable genes. The cross combinations, E 31× E 40, E 31× E 64, E 31× E 79, E 38× E 40, E 58× E 79, E 63× E 79, E 64 × E 79 showing significant and positive sca effects can be used for commercial hybrid variety development after verifying them at different locations.

Keywords: Heterosis, Combining ability, Grain yield, Maize.

Location: Bangladesh Agricultural Research Institute, Gazipur

Start Date: 00-00-2011

End Date: 00-00-2013

Program Area: Variety and Species

Commodity: Maize

Objectives:

The present investigation was undertaken to isolate desirable inbred lines and better combining parents for development of suitable waterlog tolerant maize hybrids.

Methodology:

Eight medium waterlogged tolerant maize inbred lines were mated in a 8×8 diallel fashion excluding the reciprocals during the rabi season in 2011-12. The resulting 28 F_1s and their parents were evaluated along with two checks (BARI Hybrid Maize-9 and 900 M Gold) in a alpha lattice design with three replications at the Bangladesh Agricultural Research Institute, Gazipur in the rabi season of 2012-2013. Each plot consisted of single row of 5 m long. The spacing between rows was 60 cm and plant to plant was 20 cm. One plant per hill was maintained after proper thinning. Observations were recorded on ten randomly selected plants from each plot for plant height, ear height, ear length, ear diameter, number of kernels per ear, and 1000-kernel weight. Days to silking and kernel yield were recorded on whole plot basis and the yield was converted to tons per hectare. Data were analyzed for variance study. General combining ability (GCA) and specific combining ability (SCA) were estimated following Model I, Method II of Griffing (1956).

Source of Information: Bangladesh J. Agril. Res. 39(2): 283-291, June 2014, ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The crosses E 31× E 40, E 31× E 64, E 31× E 79, E 38× E 40, E 58× E 79, E 63× E 79, and E 64 × E 79 showing significant and positive sca effects could be used for commercial hybrid variety development after verifying at different locations.

Knowledge Management: Journal