Resistance to leaf rust in Pakistani wheat lines
2000
Mirza, J.I. (Crop Diseases Research Inst., PARC, Murree (Pakistan)) | Singh, R.P. | Ahmad, I.
57 Pakistani wheat lines including 49 NUWYT lines (National Uniform What Yield Trial) were analyzed for the identification of leaf rust resistant genes by using twelve Mexican Puccinia recondita tritici pathotypes. Postulation showed the presence of leaf rust resistant genes Lr3, Lr10,Lr16, Lr17, Lr21, Lr23, Lr26, Lr27 plus 31, Lr13 & Lrf. One line Sarsabz was found resistant to all Mexican pathotypes used and had other unidentified genes in addition to Lr16. Most of the Very derived lines had Lr26, which is associated with 1B1R translocation. Lr13, closely associated with Lr23, was also postulated in some lines. The lines were also evaluated for adult plant resistance and area under the disease progress curve (AUDPC) showed varying behavior . AUDPC ranged from 0%, for highly resistant to 100%, for the most susceptible one. Analysis indicated presence of good adult plant resistance in the lines.
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