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Characterization of Single Spore Isolates of Agaricus bisporus (Lange) Imbach Using Conventional and Molecular Methods

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Abstract

Strains A-15, S11, S-140, and U3 of Agaricus bisporus (Lange) Imbach, were used as parent strains for raising single spore homokaryotic isolates. Out of total 1,642 single spore isolates, only 36 single spore isolates were homokaryons and exhibited slow mycelial growth rate (≤2.0 mm/day) and appressed colony morphology. All these SSIs failed to produce pinheads in Petri plates even after 65 days of incubation, whereas the strandy slow growing SSIs along with parent strains were able to form the fructification in petriplates after 30 days. Out of 24, six ISSR primers, exhibited scorable bands. In the ISSR fingerprints, single spore isolates, homokaryons, lacked amplification products at multiple loci; they grow slowly and all of them had appressed types of colony morphology. The study revealed losses of ISSR polymorphic patterns in non-fertile homokaryotic single spore isolates compared to the parental control or fertile heterokaryotic single spore isolates.

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Correspondence to Manju Sharma.

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Sharma, M., Suman, B.C. & Gupta, D. Characterization of Single Spore Isolates of Agaricus bisporus (Lange) Imbach Using Conventional and Molecular Methods. Curr Microbiol 69, 474–483 (2014). https://doi.org/10.1007/s00284-014-0608-6

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  • DOI: https://doi.org/10.1007/s00284-014-0608-6

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