Marker-assisted pyramiding of leaf rust resistance genes Lr24 and Lr28 in wheat (Triticum aestivum)

Indian Journal of Agricultural Sciences (Impact Factor: 0.14). 03/2011; 81(3):214-218.


A study was undertaken to pyramid two effective leaf rust resistance genes Lr24 and Lr28 in 'PBW 343' wheat Triticum aestivum L. emend. Fiori & Paol.) background, a ruling variety of North Western Plains Zone using marker ssisted selection. 'PBW343' near isogenic lines with Lr24 and Lr28 developed through backcross breeding, were ntercrossed and the marker assisted selection was conducted in the F1 to F4 segregating generations using SCAR arkers S73719 and S421719 linked to Lr24 and Lr28 respectively. Homozygous pyramid lines were developed and valuated in yield trials to assess the effect of these genes on yield parameters. Some of the pyramid lines were observed o have better yield potential than the recipient parent 'PBW 343' and no yield penalty was apparent in these lines. elected lines are being used for combining stripe rust and stem rust resistance genes with leaf rust resistance through marker assisted selection.

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Available from: Sudhir Kumar Gupta
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