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Study on morphology, pathogenicity and genetic diversity of Wilsonomyces carpophilus isolates, the causal agent of shot hole of stone fruit trees based on RAPD-PCR in Iran

Shot hole disease is one of the most important diseases of stone fruit trees in Iran. The disease is wide spread among orchards of Prunus spp. During spring and summer of 2007, 80 monoconidial isolates of the pathogen were recovered from infected leaves, fruits and twigs of different Prunus spp. in...

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Published in:Archiv für Phytopathologie und Pflanzenschutz 2012-10, Vol.45 (17), p.2076-2086
Main Authors: Ahmadpour, Abdollah, Ghosta, Youbert, Javan-Nikkhah, Mohammad, Ghazanfari, Keyvan, Fatahi, Reza
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description Shot hole disease is one of the most important diseases of stone fruit trees in Iran. The disease is wide spread among orchards of Prunus spp. During spring and summer of 2007, 80 monoconidial isolates of the pathogen were recovered from infected leaves, fruits and twigs of different Prunus spp. in West Azerbaijan, Tehran, Ghazvin and Razavi Khorasan provinces of Iran and were studied taxonomically. Based on morphological and physiological characteristics and growth optimal temperature, all isolates were identified as Wilsonomyces carpophilus. Seedlings of stone fruits (apricot, almond, peach, nectarine, plum, sweet cherry and sour cherry) were used for pathogenicity tests. All seedlings were susceptible to the fungal isolates and showed disease symptoms on twigs, leaves, buds and petioles. Genetic diversity of 28 selected fungal isolates was investigated based on DNA fingerprinting by random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR), using four random primers. Based on cluster analysis of the PCR results from the four primers, 10 fingerprinting groups (clonal lineages) and 27 haplotypes were identified. Clonal lineages “C”, “D” and “E”, each with six haplotypes formed the biggest clonal lineages, but other clonal lineages (“B”, “F”, “G”, “H”, “I” and “J”) included only one isolate. No correlation was detected among clonal lineages with the location of selected isolates and their host species. A correlation was found between the substrate (fruit, twig or leaf) and clonal lineages, particularly in “C” clonal lineage. The results showed that the fungus population had high genetic diversity which is distributed among the different areas of Iran.
doi_str_mv 10.1080/03235408.2012.721072
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The disease is wide spread among orchards of Prunus spp. During spring and summer of 2007, 80 monoconidial isolates of the pathogen were recovered from infected leaves, fruits and twigs of different Prunus spp. in West Azerbaijan, Tehran, Ghazvin and Razavi Khorasan provinces of Iran and were studied taxonomically. Based on morphological and physiological characteristics and growth optimal temperature, all isolates were identified as Wilsonomyces carpophilus. Seedlings of stone fruits (apricot, almond, peach, nectarine, plum, sweet cherry and sour cherry) were used for pathogenicity tests. All seedlings were susceptible to the fungal isolates and showed disease symptoms on twigs, leaves, buds and petioles. Genetic diversity of 28 selected fungal isolates was investigated based on DNA fingerprinting by random amplified polymorphic DNA-polymerase chain reaction (RAPD-PCR), using four random primers. Based on cluster analysis of the PCR results from the four primers, 10 fingerprinting groups (clonal lineages) and 27 haplotypes were identified. Clonal lineages “C”, “D” and “E”, each with six haplotypes formed the biggest clonal lineages, but other clonal lineages (“B”, “F”, “G”, “H”, “I” and “J”) included only one isolate. No correlation was detected among clonal lineages with the location of selected isolates and their host species. A correlation was found between the substrate (fruit, twig or leaf) and clonal lineages, particularly in “C” clonal lineage. The results showed that the fungus population had high genetic diversity which is distributed among the different areas of Iran.</abstract><cop>Abingdon</cop><pub>Taylor &amp; Francis</pub><doi>10.1080/03235408.2012.721072</doi><tpages>11</tpages></addata></record>
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subjects almonds
apricots
branches
Buds
Carpophilus
cluster analysis
Disease
DNA fingerprinting
fruit trees
Fruits
fungi
Genetic diversity
genetic variation
Haplotypes
morphological characteristics
nectarines
orchards
pathogenicity
pathogens
peaches
petioles
plums
population genetic
Prunus avium
Prunus cerasus
Prunus species
random amplified polymorphic DNA technique
seedlings
spring
Stigmina carpophila
summer
temperature
Thyrostroma carpophilum
title Study on morphology, pathogenicity and genetic diversity of Wilsonomyces carpophilus isolates, the causal agent of shot hole of stone fruit trees based on RAPD-PCR in Iran
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