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Articles by Abebech Desalegn Ayalew
Total Records ( 1 ) for Abebech Desalegn Ayalew
  Abebech Desalegn Ayalew , Mesfin Kebede Gessese and Gobeze Loha Yada
  Background and Objective: Stem rust is a devastating disease of bread wheat and durum wheat in the major wheat-growing regions of the world. Particularly, the stem rust race identified as Ug99 and its mutants initially emerged in Uganda in 1999 had crossed borders of neighboring countries in Africa, Middle East and Asia has become a major threat to the world wheat industry. Therefore, the present study was conducted in the greenhouse and field to assess sources of durable resistance to stem rust. Materials and Methods: Fifteen durum wheat genotypes and a susceptible cultivar ‘Morocco’ were evaluated in the greenhouse and field at Debre Zeit Agricultural Research Center, Ethiopia, in order to detect the presence of effective stem rust resistance genes. A mixture of three dominant races of Puccinia graminis f. sp. tritici (TKTTF, TTKSK and JRCQC) was used for inoculation. The field experiment was conducted using Random Complete Block (RCB) design with three replications at two different locations. Results: Phenotyping of the genotypes at seedling stage in the greenhouse showed four genotypes (Ginchi, Quami, DW-#3 and DW-#11) that carried effective All Stage Resistance (ASR) genes; however, the rest 11 genotypes showed susceptible reaction. On the other hand, the field assessment of the genotypes for stem rust resistance showed presence of varied levels of field resistance. The combined results from both seedling reaction test and field experiments indicated that the 11 genotypes might possess one or more Adult Plant Resistance (APR) genes to stem rust of wheat. Conclusion: The 11 genotypes that possessed APR genes can be good sources of durable stem rust resistance genes to be incorporated in the Ethiopian durum wheat improvement program.
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