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Genetic Analysis of Some Yield Contributing Characters in Mungbean (vigna Radiata)

S. K. Bhadra
Department of Botany. University of Chittagong. Chittagong

Aparna Dey
Department of Botany. University of Chittagong. Chittagong

Abstract/ Executive Summary:

Genetic analysis of four yield contributing characters viz., days to flowering, plant height, pod bunches/plant and pods/plant was done in a 6 x 6 diallel cross population of mungbean. Genetic diversity among the parental varieties was observed for all characters, Graphical analysis revealed the presence of epistasis for days to flowering, For the other three characters additive dominance model was adequate, In numerical analysis preponderance of dominance variance was noted for pods/plant. Days to flowering and plant height registered only significant amount of dominance variation. On the other hand, both additive and dominance gene actions were equally important in the inheritance of pod bunches/plant. The degree of dominance was in the range of partial dominance for plant height and pod bunches/plant. For the other two characters over dominance was recorded; but for above two traits graphical analysis revealed the presence of partial dominance, Positive and negative alleles were equally frequent for days of flowering and pod bunches/plant. For the other two characters on an average negative alleles were proportionately more, arrow sense heritability was highest in case of plant height (0.49) followed by pods/ plant (0.483), pod bunches/plant (0.416) and days to flowering ( 0.125 ),

Keywords: Genetic, Yield contributing, Mungbean

Location: Botanical Garden of Chittagong University.

Start Date: 00-00-1982

End Date:

Program Area: Variety and Species

Commodity: Mungbean

Objectives:

To using six diverse mungbean varieties for diversity analysis.

Methodology:

Six parents complete diallel analysis was done using the varieties. 'Pusa Baisakhi', 'M-7838', 'UPM-79-1', 'S-8', 'Jawahar-45' and 'PS-46'. The parents and their F₁ hybrids were grown in randomized block design with three replications at the Botanical Garden of Chittagong University during kharif, 1982. A single row of 5m length each constituted the experimental plot. The row spacing was 30 cm and plant to plant distance within row was 10 cm. Observations on four yield contributing characters viz., days to flowering, plant height (cm), pod bunches/plant and pods/plant were recorded on 10 random plants excluding border ones. The data were subjected to Wr, Vr graph analysis and the estimation of genetic parameters.

Source of Information: Bangladesh Journal of Agriculture. Vol: 10 (No-1), pp: 1-8, 1985

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

From the results it is clear that while only the nonadditive gene actions played a significant role in the inheritance of days to flowering and plant height, both additive and nonadditive gene actions are important for pod bunches/plant and pods/plant. Inter-loci interactions (epistasis) played an important role in the inheritance of days to flowering. Components of epistasis were not analyzed and thus its nature remained unknown. Further study in this regard is suggested. The additive part of genetic variance which has been noted in case of pod bunches/plant and pods/plant indicated the possibility of further improvement of these characters through the exploitation of these variances with the use of general breeding procedures of self-pollinated crops. Too rapid fixation of the genes is not however desirable.

Knowledge Management: Journal