Indian Society of Genetics & Plant Breeding

Chromosomal location of leaf rust and stem rust resistance introgressed from Triticum militinae Zhuk. into common wheat

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The leaf rust and stem rust resistance genes introgressed
from Triticum militinae Zhuk. (2n = 4x = 28, genome,
AAGG) into common wheat were assigned to the specific
chromosomes through aneuploid analysis. Aneuploid
analysis was done using two different and complete sets
at monosomic series in the background of Lal 8ahadur
and Chinese Spring. The rust resistant selection, Sel. T
2600, carrying the resistance introgressed from T. militinae
Zhuk. was crossed with individual monosomic plants and
monosomic plants were identified cytologically. The
genetic analysis of F2 progenies derived from monosomic
F1 plants tested with the most virulent leaf rust pathotype
77-5 and the stem rust pathotype 40-1 at seedling stage
indicated that the crosses Lal 8ahadur 68 mono/Sel.
T 2600 and Chinese Spring 18 mono/Sel. T 2600 as
"critical line" for leaf rust resistance and the cross Chinese
Spring 68 mono/Sel. T 2600 for stem rust resistance
studies. The leaf rust and stem rust resistance of Sel.
T 2600 were assigned to the chromosomes 68 and 18,
respectively, introgressed as two different independent
translocations and under dominant monogenic control.

Keywords: Wheat, Triticum militinae, rust resistance, monosomic analysis, chromosomal location.


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



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