Indian Society of Genetics & Plant Breeding


Enhancing rust resistance in wheat through marker assisted backcross breeding

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Rusts are among the most devastating fungal diseases of
wheat worldwide causing major yield losses. The most
effective way to control yield losses caused by rusts is by
incorporating genetic resistance in wheat cultivars. In view
of this, marker assisted backcrossing (MABC) was performed
to transfer three highly effective genes, two for leaf rust
resistance (Lr19/Sr25 and Lr24/Sr24) and one for stripe rust
resistance (Yr15) into a wheat cultivar UP 2338. The Avocet/
Yr15 (Yr15) was used as donor for stripe rust and FLW 8
and FLW 21 were the donors for Lr19/Sr25 and Lr24/Sr24,
respectively. Two linked SSR markers, Xgwm273 for Yr15
and Xwmc221 for Lr19/Sr25 and a SCAR marker, SCS1302
for Lr24/Sr24 were used for foreground selection to select
plants carrying respective gene(s). Foreground selection
coupled with background selection identified plants
homozygous for stripe rust and leaf rust resistance and
materials have been advanced up to BC3F3 stage. Findings
of this investigation show the usefulness of marker assisted
selection in precise introgression of the genes for stripe
rust and leaf rust resistance.

Keywords: Wheat, rust, marker assisted backcrossing, foreground selection, background selection


Year: 2018
Volume: 78
Issue: 1
Article DOI: 10.5958/0975-6906.2018.00003.2
Print ISSN: 0019-5200
Online ISSN: 0975-6906


Jai Prakash Jaiswal info_circle
Saurabh Badoni info_circle

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