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Open Access Taxonomic implications of antheridial variability in forty-five watermold isolates: a statistical analysis

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Morphological variability of sexual features used in watermold identification renders species identifications difficult and calls into question the taxonomic utility of these characters. Herein I have employed chi square statistical analysis to quantify antheridial character state distribution differences between replicate pairs of 38 isolates representing the saprolegniaceous genera Achlya, Saprolegnia, Thraustotheca, and 7 non-sporulating watermolds. Thirty-nine of 45 pairs differed at or below the P=.05 significance level, suggesting that current morphological species concepts are inadequate, at least for Achlya and Saprolegnia.

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Keywords: MORPHOLOGY; OOMYCOTA; SAPROLEGNIACEAE; SYSTEMATICS

Document Type: Research Article

Publication date: 15 October 2010

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