You are here: Home
/ Publication Information
Title: Allozyme differentiation of intersterility groups of Heterobasidion annosum isolated from conifers in the western United States
Author: Otrosina, W.J.; Chase, T.E.; Cobb, F.W. Jr.;
Source: Phytopathology 82:540-545.
Publication Series: Miscellaneous Publication
Description: Allozyme analysis was conducted on 64 isolates from basidiocarps of Heterobasidion annosum. The isolates belonged to the "S" and "P" intersterility groups and were collected from five conifer species found in the western United States. Ten allozyme loci distributed among eight enzyme systems were examined. Intersterility groups differed at nine loci. Few alleles were common to both both intersterility groups, and only one locus, MDH-1, was monomorphic. Several loci, including MDH-2, GDH, and PGI, were diagnostic for the S or P intersterility groups, suggesting fixation for alternative or null alleles.Distribution of alleles between intersterility groups indicates an extremely high degree of genetic divergence; Nei's genetic distance was equal to 0.926. Isolates from diseased pine trees had only alleles consistent with those of P group, and isolates from diseased true fir had S group alleles, indicating a complete association among intersterility groups, allozyme profiles, and host species. These data support a hypothesis of genetic isolation between intersterility groups in nature. Allozyme genotypes provide a rapid test for identifying intersterility groups of the fungus in North America.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication. (Please specify exactly
which publication you are requesting and your mailing address.)
XML: View XML
Otrosina, W.J.; Chase, T.E.; Cobb, F.W., Jr. 1992. Allozyme differentiation of intersterility groups of Heterobasidion annosum isolated from conifers in the western United States. Phytopathology 82:540-545.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility