Indian Society of Genetics & Plant Breeding

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RELATIVE USEFULNESS OF TRIPLE TEST CROSS METHODS 1<'OR ESTIMATING ADDITIVE AND DOMINANCl IN BREADWHEAT

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Forty-five triple test cross progenies of wheat were produced by crossing 15 true breeding
lines/varieties with three testers and grown in normal and stress environments. The data
on parents and Fts were analysed for days to heading, plant height, tillers/plant, total
biomass, grains/ear, 10llO-grain weight and grain- yield/plant to determine the relative
usefulness of three methods for estimation of additive and dominance components of
genetic variation. The variance of parents (q~) estimated the additive component better
than the two other methods (Iu + I 2i and I u + I 2i + I 3;). The methods 4 q 3+ 9 ~ (Iti + I 2i
-Pi) and 25 (q2 (2 Itl-Pi) pooled with ~ (2 I 2i-Pi)] pro'Vidld better estimates of dominance
component than I tl-L2rmethod in the presence of epistasis. These two methods also gave
similar estimates of dominance component.
 

Keywords: Triticum aestivum, relative usefulness, triple test cross, additive and dominance components.

Info

Year: 1994
Volume: 54
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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