Indian Society of Genetics & Plant Breeding

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MUTAGEN INDUCED POLYGENIC VARIABILITY IN MUNGBEAN (VIGNA RADIATA WILCZEK L.)

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Two varieties of mungbean were treated with three chemical mutagens and gamma
'rays. In M2 and M3 observation on six characters were recorded for overall variance,
interfamily variance and character means. All mutagen doses induced significant
variability. Mean values showed a negative shift for most of the characters in M2.
Plants with desirable attributes were selected from M2 families showing higher CV
and mean values than the highest corresponding values from the respective control
group of families. Selection in M2 was effective as mean values in M3 shifted in
positive directions and in M3 interfamily variances increased over corresponding
M2 treatments. In M3 alongwith the positive shift of mean values, both interfamily
and overall variances were still significantly higher than the respective control values
indicating scope for further selection and improvement of characters governed by
polygens. In Ms yield trial, the selected strains gave yields upto 19.7 q/ha against
control yields of 12.2 q/ha. The study reveals that mutagenesis is a potent tool for
the improvement of polygenic characters, provided large populations are raised and
rigrous selection procedures are followed.
 

Keywords: Mungbean, mutagenesis, polygenes, micromutations.

Info

Year: 1999
Volume: 59
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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