Indian Society of Genetics & Plant Breeding


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Two sets of materials were produced involving 22 wheat cultivars to study the genetics of
slow leaf rusting. In Set I, seven generations (two parents, Ft, F2, F3, BCl and BC2) of three
crosses (Kalyan Sona X Pavon, Kalyan Sona x WH 147, and K 68 X Veery'S') were raised
and the data analysed to estimate various genetic parameters and test the adequacy of
models. In Set II, 60 triple test-cross families produced by crossing 20 wheat cultivars with
three testers (Kalyan Sona, Pavon and their Fd were evaluated to detect epistasis and
estimate D and H components of genetic variation. The 6-parameter model explained best
the inheritance of slow leaf rusting in the material of Set I. Partial dominance was indicated
by all the three crosses and the genes causing less disease were dominant over their alleles
causing more disease. Duplicate epistasis was present in all the three crosses. The results
of the two sets were similar except that a case of complete dominance tending towards
overdominance was indicated in Set II.

Keywords: Slow leaf rusting, wheat, genetic parameters.


Year: 1994
Volume: 54
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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