Indian Society of Genetics & Plant Breeding

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A STUDY OF COMPONENTS OF GENETIC VARIATION AND GENOTYPE X ENVIRONMENT INTERACTION IN SELFED WHEAT TRIPLE TEST-CROSS FAMILIES

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Ninety progenies produced bycrossing 30 wheat varieties/lines with three testers in a triple
test-cross fashion were seIfed and grown together with parents to detect various
components of genetic variation and interaction of these components with sowing date for
seven metric traits. The testers were adequate for days to heading, grain number, 1000-grain
weight and grain yield per plant. Epistasis was observed for plant height, tiller number and
spike length in both sowings. The nonfixable epistasis was more important and sensitive
to environment than fixable epistasis. Generally, the additive component was equally or
more important than the dominance component. Both the components were equally
sensitive to the change in environment. In all cases, dominance was directional.
 

Keywords: Genetic variation, genotype x environment interaction, triple test-eross, wheat.

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Year: 1995
Volume: 55
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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