ANALYSIS OF LEAF RUST RESISTANCE IN SOME EGYPTIAN WHEAT VARIETIES

Abstract

Wheat leaf rust (Puccinia recondita f. sp. tritici) is considered one of the most serious disease that limiting the wheat production under favorable . environmental conditions in Egypt.

Until now, use of resistance varieties is the most successful method to control this disease. Therefore, this investigation was carried out to . • identify the leaf rust resistance genes in nine Giza wheat varieties i.e. Giza ' 144, Giza 155, Giza 157, Giza 160, Giza 162, Giza 163, Giza 164, Giza

165 and Giza 167.

The obtained results could be summarized as follows:

1-Seedling leaf rust resistance genes:

• The' obtained results showed that, the resistance in the wheat cultivar; Giza 162 to race SCDFQ was governed by the dominant gene Lr 10.

• While, the resistance in the four wheat cultivars; Giza 162, Giza 164,

Giza 165 and Giza 167 to race MCFLQ was governed by the • dominant geneLr 16.

• Moreover, the wheat cultivars; Giza 157 and Giza 163 have two seedling resistance genes, one of them is Lr 16.

• Also, the results indicated that, the wheat cultivars; Giza 160, Giza

162. and Giza 164 have the adult plant resistance gene; Lr 24 when they tested with the physiologic race SCFPQ.

• While, the wheat cultivar Giza 155 has two genes for resistance one of them is Lr24