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Geographical cline of DNA variation within the F intersterility group of Heterobasidion annosum in Italy
Author(s) -
LA PORTA N.,
CAPRETTI P.,
KAMMIOVIRTA K.,
KARJALAINEN R.,
KORHONEN K.
Publication year - 1997
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1046/j.1365-3059.1997.d01-65.x
Subject(s) - cline (biology) , upgma , heterobasidion annosum , biology , rapd , genetic variation , balkan peninsula , genetic variability , ecology , genotype , genetics , genetic diversity , demography , gene , picea abies , population , sociology
Eighty‐six Heterobasidion annosum isolates, mainly belonging to the F intersterility group and obtained from 32 different geographical localities in Italy, were subjected to genetic analysis by the Random Amplified Polymorphic DNA (RAPD) markers. The similarity between F and S groups was higher than that between F and P. In UPGMA Cluster Analysis, the F isolates originating from the same locality usually grouped in the same cluster. The isolates also showed a tendency to group at the level of larger geographical areas. Within the F group, isolates from the south of the Italian peninsula showed the highest genetic variation and northern isolates from the Alpine regions showed the lowest. This indicates a gradual cline along the peninsula. The genetic variability in the Italian F group is discussed in relation to the past and present distribution of the host species in Italy and Europe.