Note on the variation in expression of hypersensitivity toPhytophthora infestansin potato seedlings

• Book ID: 104617468
• Publisher: Springer
• Year: 1958
• Tongue: English
• Weight: 146 KB
• Volume: 7
• Category: Article
• ISSN: 0014-2336
• DOI: 10.1007/bf00037862

✦ Synopsis

When seedlings derived from crosses in which a gene (R) for hypersensitivityresistance is involved, are sprayed with swarmspores of Phytophthora infestans, it is generally not difficult to identify the susceptible and the resistant seedlings . The susceptible seedlings are densely covered with conidiophores, the resistant ones are entirely free . The latter ones are more or less necrotically damaged .

In some cases, however, apart from the clearly susceptible ones, seedlings occur that show heavy necrosis and in addition some mycelial growth . The writer shows that these seedlings nevertheless contain the gene R .