Combining ability worked' out from 5 x 10 (line x tester) data revealed that nonadditive
gene action was more important than additive gene action for capsule number and capsule
size. Year effects were pronounced for both characters. Magnitude of variance for gca X year
interaction was much less than the corresponding magnitude of sca x year interaction for
capsule number. For capsule size, sca x year interaction variance was of less magnitude
than the gca x year interaction variance. Crosses EC 11552 x KP and EC 11571 x Hariana for
capsule number, and EC 11540.x DCG and EC 11556 x KD for capsule size were the best
specific combinations. Single plant selection after inter-se mating in segregating
generations would be the best way to improve these traits. Pedigree method would be a
better approach in the cross EC 11548 x DCG for capsule size where additive gene effects
were more important.
Keywords: Line x tester, combining ability, opium poppy.
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
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