Indian Society of Genetics & Plant Breeding

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DETECTION OF EPISTASIS AND ESTIMATION OF COMPONENTS OF GENETIC VARIATION APPLYING MODIFIED TRIPLE TEST CROSS ANALYSIS USING TWO TESTERS IN PEA (PISUM SATlVUM L.)

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Fifteen lines of pea (Pisum sativum L.) were crossed with two testers. Genetic analysis was
carried out to detect epistatis and estimate components of genetic variation for seven
quantitative traits. Epistasis was detected for all thecharacterstudied. Significant estimates
of both additive (D) and dominance (H) components were observed for all the characters,
except for the pod length. Estimates of additive components assessed from the pure line
families (0') for different characters was comparable with the 0 component derived from
sums (Lti + Lzi) of the triple test cross families. The F value was positive and significant for
days to flowering, plant height, pods per plant, seed weight and seed yield per plant
showing isodirectional nature of dominance. Significance of additive component and F
parameter showingincreasing effect on the characterindicate that pedigree selection would
be effective for the improvement of such traits.
 

Keywords: Modified triple test cross, epistatis, additive component, dominance component, pea.

Info

Year: 1997
Volume: 57
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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