2015
DOI: 10.1038/srep18250
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Population genetic analysis reveals cryptic sex in the phytopathogenic fungus Alternaria alternata

Abstract: Reproductive mode can impact population genetic dynamics and evolutionary landscape of plant pathogens as well as on disease epidemiology and management. In this study, we monitored the spatial dynamics and mating type idiomorphs in ~700 Alternaria alternata isolates sampled from the main potato production areas in China to infer the mating system of potato early blight. Consistent with the expectation of asexual species, identical genotypes were recovered from different locations separated by hundreds of kilo… Show more

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Cited by 46 publications
(70 citation statements)
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“…These locations were chosen to represent a climatic gradient covering the main potato production areas in the country. The pathogen isolates were previously genotyped with eight pairs of microsatellite markers and the detailed information on collection, isolation, DNA extraction, and microsatellite genotyping of the isolates can be found in these publications (Meng et al., ,b). Briefly, potato leaves with typical early blight symptoms were sampled from plants at 1‐ to 2‐meter intervals and each infected leaf was packed separately in a sealed sandwich bag.…”
Section: Methodsmentioning
confidence: 99%
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“…These locations were chosen to represent a climatic gradient covering the main potato production areas in the country. The pathogen isolates were previously genotyped with eight pairs of microsatellite markers and the detailed information on collection, isolation, DNA extraction, and microsatellite genotyping of the isolates can be found in these publications (Meng et al., ,b). Briefly, potato leaves with typical early blight symptoms were sampled from plants at 1‐ to 2‐meter intervals and each infected leaf was packed separately in a sealed sandwich bag.…”
Section: Methodsmentioning
confidence: 99%
“…To isolate the pathogen, infected leaves were first rinsed briefly with distilled water, surface‐sterilized with 75% alcohol for one minute, and then incubated at 24°C on 1% water–agar medium. After 24 hr, a single conidium was taken from each infected leaf, incubated on potato dextrose agar (PDA, potato 200 g/L, glucose 20 g/L, agar 20 g/L) plates, and then maintained for two weeks in an incubator set to 24°C under a dark condition (Meng et al., 2015a). The resultant isolates were purified three times by repeatedly transferring a single conidium to fresh PDA plates.…”
Section: Methodsmentioning
confidence: 99%
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“…can cause early blight. Those species identified based on morphological and molecular characteristics are A. tomatophila , A. grandis, A. tenuissima, Alternaria interrupta, Alternaria infectoria, Alternaria dumosa, Alternaria arbusti and A. alternate [5][6][7][8][9].…”
Section: Introductionmentioning
confidence: 99%