Abstract

This work aimed to find out patterns of virulence variability of a Phoma tracheiphila population of 51 isolates, to determine geographic distribution of Mal Secco disease in citrus orchards of six Mediterranean countries and also to establish correlation between geographic distribution and pathotypic distance of P. tr population structure over our sampling spatial scale. Based on unweighted pair-group method with arithmetic averaging clustering and mean disease rating scores, three distinct virulence groups were identified. The 51 isolates were classified into 20 pathotypes. Extensive virulence variability was detected in 51 isolates of P. tr causing MSD of citrus in the Mediterranean basin. Regression plot between pairwise virulence and geographical distance showed that virulence is independent of the geographical origin and that isolates collected from the same country have different degrees of virulence. The lack of significant correlation between virulence and geographic structure confirmed the absence of isolation-by-distance pattern, suggesting non-regular and non-gradual dispersal of the pathogen over this spatial scale.

Autore Pugliese

• Ippolito Antonio

Tutti gli autori

• IPPOLITO A.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2014

ISSN

0929-1873

ISBN

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Numero di citazioni Wos

1

Ultimo Aggiornamento Citazioni

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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