The coinfection experiments in this study with avirulent
and virulent parasites in the same astrocytic host cell addressed an important question.
Therefore, further research is required in order to understand and identify the protective antigens in virulent and avirulent
isolates of Rs and their role in the immune response against the bacterium, especially for the cellular response.
Type LBB HDG QCL races 1 [4.sup.-]4 [4.sup.-] [X.sup.-] 2 2 [1.sup.+c] [4.sup.-]4 [X.sup.-] 5 3 [1.sup.+] [2.sup.=] [X.sup.-] 5 4 [1.sup.+] [2.sup.=] [X.sup.-] 7 Parents Medea [1.sup.=][X.sup.=] [1.sup.+] [2.sup.-] [1.sup.-] 6 LMPG [4.sup.-]4 4 4 0 Glossy 0;[1.sup.=] [4.sup.-] 4 [2.sup.+] 2 Hugenot (c) Means yellow chlorosis around the pustules.
incognita that are avirulent
and virulent to gene Rk and their probable genotypes.
All 15 virulent isolates and 23 randomly selected avirulent
isolates were used for in vitro antimicrobial drug susceptibility testing and genotyping.
This undoubtedly resulted from the fact that two older races were used in the selection process and LCB is particularly avirulent
Isolate PXO61 of Race 1 is avirulent
to Xa4, whereas PXO86 of Race 2 is virulent to this gene (Vera Cruz and Mew, 1989; Koch and Parlevliet, 1991).
Three-hundred seventy-five [F.sub.2] plants were tested with the KS strain of WCM, which is avirulent
to Cmc1 and to the Ae.
Analysis of the complete genomic sequence of an apparently avirulent
strain of avian hepatitis E virus (avian HEV) identified major genetic differences compared with the prototype pathogenic strain of avian HEV.
triticina isolates tested for virulence to adult plants of the Thatcher line with Lr12 were avirulent
, and all the isolates tested produced smaller and fewer uredinia on adult plants of the Thatcher line with Lr34 compared with Thatcher.
Characterization of virulent and avirulent
chicken Pennsylvania 83 influenza virus: Potential role of defective interfering RNAs in nature.
Biotype G was described as the first greenbug isolate avirulent