Abstract:
:A set of Diaporthe helianthi isolates collected in different geographic areas was studied in order to examine whether different genetic biotypes could be responsible for epidemiological differences shown by sunflower stem canker. D. helianthi causes serious losses in France and in former Yugoslavia, while the pathogen is only sporadically recorded in Italy in spite of conducive pedoclimatic conditions. Variability of a D. helianthi coding genomic region, evaluated by means of polymerase chain reaction (PCR), Southern blot hybridisation and restriction fragments length polymorphism (RFLP), showed a conserved homogeneous pattern shared by French and Yugoslavian isolates compared with the heterogeneous pattern of Italian isolates. These results are consistent with other investigations (IGS and ITS region variability) performed on the same set of isolates, allowing a correlation between D. helianthi biotypes, their geographic origin and sunflower stem canker epidemiology.
journal_name
Mycopathologiajournal_title
Mycopathologiaauthors
Vergara M,Cristani C,Regis C,Vannacci Gdoi
10.1023/b:myco.0000038448.60051.6bkeywords:
subject
Has Abstractpub_date
2004-07-01 00:00:00pages
123-30issue
1eissn
0301-486Xissn
1573-0832journal_volume
158pub_type
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