Indian Society of Genetics & Plant Breeding

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TRANSGRESSION VIS-A-VIS GENETIC DIVERGENCE AND COMBINING ABILITY IN TRIPLE TEST CROSS PROGENY OF WHEAT (TRITICUM AESTIVUM L.)

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Triple test cross (TIC) pro~enies,resulting from matings between 15 divergent lines and 3
testers, were raised in randomized block design under normal (irrigated) and stress
(rainfed) environments. Observations were recorded on tiller number, grains/spike,
1000-grain weight, grain yield/plant, and Mahalanobis' D2 values were computed using
multivariate analysis. Corn·lations between divergence (-{i)2) and progeny means showed
independence of each other in both environments. The frequency as well as the level of
transgression and progeny means were cross-specific and independent of -voi values
among the parents. TIC design permitted a wholistic approach to select potent crosses
based on gene effects, comparative segregational potential and divergence between
parents.
 

Keywords: Triple test cross, wheat, Triticum aestivum, transgression.

Info

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

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