Genetic structure of Italian populations of Pyrenochaeta lycopersici, the causal agent of corky root rot of tomato

• DOI: 10.1111/ppa.12326
• Publication Date: 2014-11-10T10:10:33Z
• Authors: A. Infantino; N. Pucci; M. Aragona; S. de Felice; D. Rau
• Keywords: Lineage (genetic)

Pyrenochaeta lycopersici is the causal agent of corky root rot, which a serious disease worldwide that attacks roots tomato. A total 139 isolates were sampled from eight locations in Italy and Israel assigned to two molecular types (type 1 type 2) based on internal transcribed spacer ( ITS ) sequences. These genotyped using amplified fragment length polymorphisms AFLP s) decipher population structure. Based this structure analysis, three groups P. identified. One group correlated 1, while other 2. amova indicated high genetic divergence F ST = 0·40) between Italian data support view represent significant evolutionary entities, although there might be incomplete lineage sorting present. Some different observed have very similar multilocus profiles, some genotypes intermediate types. This suggests parasexual hybridization has had role shaping . Finally, average among populations within was SC 0·710, P < 10 −5 ), probably due strong drift founder effects combined with restricted migration.