Microsatellite Analysis Revealing High Genetic Diversity of the Chestnut Blight Fungus in South Tyrol (Northern Italy)

被引:4
|
作者
Ahmad, Farooq [1 ,2 ]
Baric, Sanja [1 ]
机构
[1] Free Univ Bozen Bolzano, Fac Sci & Technol, Univ Pl 5, I-39100 Bozen Bolzano, Italy
[2] Univ Valladolid, Sustainable Forest Management Res Inst, Avda Madrid, Palencia 34004, Spain
来源
FORESTS | 2022年 / 13卷 / 02期
关键词
simple sequence repeats (SSRs); microsatellite loci; Cryphonectria parasitica; population genetics; fungal plant pathogen; introduction events; sexual reproduction; invasive fungal species; VEGETATIVE COMPATIBILITY TYPES; CRYPHONECTRIA-PARASITICA; POPULATION-STRUCTURE; MATING TYPES; HYPOVIRUS; LOCI; INCOMPATIBILITY; MYCOVIRUSES; VARIABILITY; CLONALITY;
D O I
10.3390/f13020344
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
Cryphonectria parasitica, which causes chestnut blight, is one of the most important pathogens of forest trees. In Europe, mycovirus-mediated biocontrol is the most efficient method to control the disease but can be impeded by the lack of information about the population structure of the fungus within a region. In particular, sexual reproduction and the new introduction of the pathogen can complicate biocontrol strategies. For this reason, this study aimed to determine the population structure of C. parasitica, which causes chestnut blight, in the northern Italian region of South Tyrol, using eleven multilocus microsatellite markers. Fifty-one haplotypes were found across South Tyrol, belonging to three divergent clusters. Recombinant genotypes demonstrated that sexual reproduction occurs across the different clusters. The most dominant genotypes in the region were also the most dominant in neighboring areas, such as Switzerland, northern Italy and France. All of the clusters from South Tyrol were related to the Italian genotype pool and are thought to have been introduced from northern Italian and other European populations due to naturally occurring gene flow or human-mediated introduction. At least three separate introduction events of C. parasitica might have happened in South Tyrol that could be separated by time. This study demonstrated a high genetic diversity of C. parasitica in South Tyrol and helped to shed light on the sexual reproduction and introduction events in the local populations.
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页数:18
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