Indian Society of Genetics & Plant Breeding

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ADDITIVE, DOMINANCE AND EPISTATIC VARIATION FOR YIELD AND ITS COMPONENTS IN LINSEED (LINUM USITATISSIMUM L.)

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Three testers, R-552, Garima and their hybrid R-552 x Garima, were crossed to 15
strains/varieties of linseed to estimate the epistatic, additive and dominance components
of genetic variance. Modified triple test-cross analysis was done for nine metric traits.
Epistasis was evident for all the characters under study except seeds/capsule. The i as well
as j and I type epistasis were significant for most of the traits. Additive (D) component was
important in all cases except capsules/plant, whereas dominance (H) was significant for
seeds/capsule, days to maturity,1000-seed weight, and oil content. All traits showed partial
dominance, and directional element, Fwas nonsignificant for most of the traits, suggesting
ambidirectional nature of dominance.
 

Keywords: Modified triple test-cross, components of genetic variation, linseed.

Info

Year: 1994
Volume: 54
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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