Indian Society of Genetics & Plant Breeding

Diallel cross designs for test versus control comparisons

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Block designs for diallel crosses for comparing a group
of test lines with a control line are suitable when the
experimenters are interested to estimate test vs. control
comparisons with respect to their general combining ability
effects with a smaller variance. In this paper, some families
of small block designs for diallel cross experiments for test
vs. control comparisons have been obtained. Out of these,
some designs are suitable when the experimenter cannot
have blocks of equal size while the others yield designs
with equal block size. As the number of lines increases, the
variance of estimated contrasts pertaining to test vs. test
lines as well as test vs. control lines decreases. Moreover,
test vs. control comparisons are made with less variance
as compared to test vs. test comparisons, in all the cases.

Keywords: Association scheme, partial balance, partially balanced incomplete block design, partial diallel cross

Info

Year: 2013
Volume: 73
Issue: 2
Article DOI: 10.5958/j.0975-6906.73.2.027
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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