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Volume 41, Issue 4

Relationships among spp. Causing Potato Scab † Free

Abstract

The levels of DNA-DNA hybridization among members of the three major groups of spp. that cause potato scab did not exceed 20% for any pair. The majority of the strains which we examined exhibited greater than 70% relatedness to the type strain, although values as low as 21% were obtained. The levels of homology between and nonpathogenic type strains belonging to the Diastatochromogenes group ranged from 10 to 42%, while the reciprocal values obtained with labeled DNAs from ATCC 25435 (T = type strain) and ATCC 14975 ranged from 37 to 74% and from 2 to 24%, respectively. In contrast to , the levels of relatedness between isolates and their type strain were high (83 to 111%). The levels of DNA relatedness within the group were uniformly low. These results are consistent with phenotypic data which indicate that pathogens in the three groups are not related. The genetic diversity of strains referred to as exceeds the genetic diversity found at the species level, and some of these strains appear to be related to phenotypically similar nonpathogens.

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Copyright © 1991 International Union of Microbiological Societies
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1991-10-01
2024-04-20
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Relationships among Streptomyces spp. Causing Potato Scab†
Int J Syst Evol Microbiol 41, 479 (1991); https://doi.org/10.1099/00207713-41-4-479
/content/journal/ijsem/10.1099/00207713-41-4-479
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