Identifying Resistance to Ethiopian Russian Wheat Aphid (Diuraphis noxia (Mordvilko)) Populations in Introduced Bread Wheat Genetic Resources
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- Russian Wheat Aphid, Bread Wheat, Ethiopia, Biotypic Diversity
- Belay, Tesfay
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- Russian wheat aphid (R.W.A.), Diuraphis noxia (Mordvilko), is a major insect pest of wheat and barley in Ethiopia. Yield losses of 67.7% have been reported on irrigated wheat. Bread wheat genetic resources (125) with promise of resistance to R.W.A. in other parts of the world were screened to northern Ethiopian R.W.A. populations in field experiment for two years. Twenty five wheat lines were resistant while 22 had moderate resistance to northern Ethiopian R.W.A. populations. R.W.A. resistant germplasm in other parts of world became susceptible to Ethiopian R.W.A. population. This might indicate biotypic diversity in the R.W.A. populations and might require full-fledged investigation using R.W.A. differentials. The resistant bread wheat germplasm identified from this study can be further tested for agronomic traits or can be used in breeding programs aimed at developing R.W.A. resistant cultivars for irrigated agriculture.
Full text: IJRAS_169_Final.pdf