Avr genes have been cloned from a variety of pathogens including fungi, bacteria, viruses and oomycetes.
无毒基因已在多种植物病原物，包括真菌、细菌、病毒和卵菌等中得到克隆。
2
Oomycetes in Ningxia were investigated and classified. It was found that there were 67 species, hosting in 176 plants, respectively, which belonged to 1 phylum, 1 class, 4 families, 10 genera.