Indian Society of Genetics & Plant Breeding

Inheritance of Triticum militinae Zhuk. derived leaf rust and stem rust resistance in common wheat

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The rust resistant hexaploid stocks, Selection (Sel.)
T 2600 and Sel. T 216-1 derived from T. aestivum x T.
militinae cross were analysed to study the mode of
inher.itance and to establish the identity of genes
conditioning seedling resistance to the leaf rust pathotype
77-5 and stem rust pathotype 40-1. The genetic analysis
of different filial generations viz., Pl' P2, Fl , F2 and BCl
F
1 of the crosses Agra Local x Sel. T 2600, Lal Bahadur
x Sel. T 2600, Chinese Spring x Sel. T 2600, Agra Local
x Sel. T 216-1, Kalyansona x Sel. T 216-1 and Chinese
Spring x Sel. T 216-1 revealed that the resistance to leaf
rust and stem rust was controlled by a single dominant
gene. The test of allelism indicated that the gene
governing leaf rust resistance in Sel. T 2600 was different
from the known genes Lng, Lr24 and Lr28 and that of
Sel. T 216-1 from Lr9, Lng and Lr28. The gene for leaf
rust resistance in Sel. T 2600 and Sel. T 216-1 was
allelic to Lr9 and Lr24, respectively. The stem rust
resistance present in Sel. T 216-1 was distinctly different
than that of 5124 and 5126 as established through the
test of allelism and the pattern of infection type.
 

Keywords: Triticum militinae, rust resistance, seedling test, inheritance, test of allelism

Info

Year: 2003
Volume: 63
Issue: 1
 Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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