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The barrage phenomenon in Lenzites betulina

The barrage phenomenon in Lenzites betulina

Genetica 18(1/2): 61-73

Results of growing monosporous mycelia of L. betulina on nutrient agar indicate that this sp. is tetrapolar, i.e., its mycelia fall into 4 groups with regard to their reactions when paired. The barrage manifest between certain mycelia is perfectly correlated with their genetic constitution, basidiospores of the formulae AB and 4b or aB and ab always showing mutual aversion to each other. Aversion is also noted between sexually compatible haplo-phytes (Ab X ab or Ab X aB), but the barrage between them is narrow and soon disappears. Evidently the B factor acts independently of the A factor, and barrage develops whenever 2 mycelia differ in the B factor. This is supported by the fact that when mycelia of unrelated strains are paired, a barrage appears followed by diploid mycelium. The gradual disappearance of the barrage phenomenon is explained by a probable decline in vigor of the mycelia under the unnatural conditions of culture. Certain strains differed in the general character of the barrages developed. The barrage effect was also noted in a specimen of Corticium calceum under natural conditions.

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Accession: 025686154

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DOI: 10.1007/bf01507927

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