Evaluation of Wheat Genotypes Against Russian Wheat Aphid, Diuraphis Noxia (RWA) Under Irrigated Condition in Ethiopia

Abstract

Among the many constraints for wheat production, Russian wheat aphids/ RWA cause severe damage by their feeding and by virus transmission. Wheat wild relatives and landraces are potential sources of resistance to aphids. Formerly research result found that RWA populations originated from Chile, Czech Republic and Ethiopia were virulent to Dn4 ,which is the resistance gene most widely deployed in wheat cultivars, however,Dn6 so far persists to be effective. Hence this study designed for the identification of moderately resistance of xxx bread wheat/Triticum aestivum genotypes at kulumsa, South Eastern Ethiopia. The present study conducted during 2021 and 2022 using irrigation water suggested two genotypes( 5010 and 8390) as MR/Moderately resistant candidate compared to wane/check, AS compared to the Moderately susceptible/MS check Balcha, nine as MS/moderately susceptible(204379, 231632, 204379, 230687,5022,231832,235037,234250 and 5694) bread wheat genotypes which are as a candidate as a source of resistance to Russian wheat aphids for future wheat breeding Programme in addition to other protocols to be investigated i.e.; green house, genotyping using known markers, investigating their physio chemical quality parameters.