Indian Society of Genetics & Plant Breeding

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GENOTYPE X ENVIRONMENT INTERACTION IN RELATION TO COMBINING ABILITY IN INDIAN MUSTARD

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Combining ability effects and variances were estimated sperately and over four
environments (two dates of sowing in two years) from a half-diallel cross involving nine
parents. Although both gca and sea variances were important, nonadditive variance was of
greater importance than additive variance controlling number of siliquae on the main
branch, total number of siliquae/plant, and seed yield/plant. Difference among the
environments was significant for all the characters. Both gea x ~nvironment and sca x
environment interaction variances were significant for all the characters studied, while
further partitioning revealed higher magnitude of nonadditive x environment interaction
than additive x environment interaction for all the traits. The varietySita exhibited good
general combining ability for number of siliquae on the secondary branches and total
numberof siliquae/plant in at least two environments and e)Ver environments. Top ranking
crosses selected on the basis of significal!t desirable sea effect involved high, medium and
low general combiners
 

Keywords: Indian mustard, combining ability, gene effects, genotype X environment interaction.

Info

Year: 1997
Volume: 57
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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