If you need an accessible version of this item please contact JSTOR User Support

Genomic Stability of Two Individuals of Armillaria gallica

Brett Hodnett and James B. Anderson
Mycologia
Vol. 92, No. 5 (Sep. - Oct., 2000), pp. 894-899
DOI: 10.2307/3761585
Stable URL: http://www.jstor.org/stable/3761585
Page Count: 6
  • Download PDF
  • Cite this Item

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If you need an accessible version of this item please contact JSTOR User Support
Genomic Stability of Two Individuals of Armillaria gallica
Preview not available

Abstract

Large genetic individuals, or genets, of Armillaria gallica grow mitotically from a single point of origin to occupy discrete territories that often cover several hectares of forest floor. Since the expansion of these individuals must require a large number of cell divisions, somatic mutations are expected. To test this possibility, 22 isolates of A. gallica were collected from throughout the spatial territory of two individuals and 41 anonymous regions of DNA were screened for variation apparent as single strand conformational polymorphism (SSCP). Although there was abundant heterozygosity within each individual and polymorphism between the two individuals, no variation was detected among isolates within either individual. This lack of variation can be explained in two ways: (i) the mutation rate in A. gallica is substantially lower than that of other DNA based microorganisms, and/or (ii) the expansion of A. gallica individuals requires far fewer cell generations than previously estimated.

Page Thumbnails

  • Thumbnail: Page 
894
    894
  • Thumbnail: Page 
895
    895
  • Thumbnail: Page 
896
    896
  • Thumbnail: Page 
897
    897
  • Thumbnail: Page 
898
    898
  • Thumbnail: Page 
899
    899