Indian Society of Genetics & Plant Breeding

Identification of the improved genotypes with 2NS/2AS translocation through molecular markers for imparting resistance to multiple biotic stresses in wheat

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Alien introgression is one of the techniques to impart stress tolerance if a broad spectrum resistance source is not available in cultivars.
Several introgressions have been utilized in wheat improvement, which has provided multiple stress tolerance in high-yielding varieties.
The 2NS/2AS translocation introgressed from
Aegilops ventricosa providing resistance to multiple biotic stresses has gained attention
after being found to carry resistance to wheat blast. The introgression was already known to carry resistance to leaf rust (
Lr37), Stem
rust (
Sr38), and yellow rust (Yr17), along with resistance to several other biotic stresses. The presence of several resistance genes in an
introgression size of 32–33 mb makes it a preferred choice to utilize in the breeding program. Therefore, the present study was conducted
to identify the superior genotypes carrying 2NS/2AS translocation. The twelve superior genotypes
viz., HD2967, HD3043, HD3059,
HD3171, HD3249, HD3293, HD3334, HD3349, HD3368, HI1605, HI1653 and HI1654 have been identifed to carry this introgression with
superior agronomic traits. The lines are already released or in the advanced stage of testing and hence can be utilized in hybridization
programs to transfer resistance to multiple stresses in new varieties.

Keywords: 2NS/2AS translocation, multiple biotic stresses, wheat, resistance


Year: 2021
Volume: 81
Issue: 4
Article DOI: 10.31742/IJGPB.81.4.4
Print ISSN: 0019-5200
Online ISSN: 0975-6906



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