![]() In Serbia, potato is produced as a field crop in several regions of the country. However, potato is severely affected by early blight every year, causing premature defoliation with a significant impact on tuber yield and potato quality loss of up to 50% annually ( Shtienberg et al., 1990 Van der Waals et al., 2004 Leiminger et al., 2014 Landschoot et al., 2017). Wind and periods of rain favor sporulation and could lead to disease outbreaks ( Van der Waals et al., 2004). The pathogen spreads through infected potato tubers as well as through the various members of the Solanaceae family which may serve as reservoirs of primary inoculum ( Rotem, 1994). Under favorable weather conditions, during warm and wet seasons, it can cause severe yield losses ( Rotem, 1994 Batista et al., 2006). This work opens new perspectives for early blight management, while the distribution of different species on the same host suggests that the etiology of disease could depend on crop organization and the presence of other Alternaria hosts in close proximity to potato plants.Įarly blight is one of the most important fungal diseases of potato and is spread worldwide in all major potato growing areas. protenta at high frequency reveals new insight into the contribution of Alternaria species in early blight disease. Within the groups of large-spored Alternaria present in Serbia, evidence of A. Our findings present a new perspective into the population structure of large-spored Alternaria species associated with early blight disease. Differentiation of species was supported by phylogeny obtained from the DNA sequences of the GAPDH, calmodulin and Rpb2 genes. grandis that were involved in early blight disease on naturally infected potato leaves in Serbia. In addition to Alternaria solani, we detected three more large-spored species identified as A. was studied by analyzing isolates from symptomatic potato leaves during multiyear sampling. We showed that the four species of Alternaria were found in areas with different distributions of the species. covering all potato production areas in Serbia. Here, we analyzed genetic and phenotypic diversity in isolates of Alternaria spp. Previous studies have shown that Alternaria solani is the main early blight pathogen parasitizing potato. Understanding which fungal pathogens are the causal agents of early blight and their distribution on the same host is essential to finding the best strategy for the control of this disease.
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