Access

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 Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

The Evolutionary and Taxonomic Implications of RAPD Data on the Genetic Relationships of Mimulus michiganensis (Comb. et stat. nov.: Scrophulariaceae)

Amanda L. Posto and L. Alan Prather
Systematic Botany
Vol. 28, No. 1 (Jan. - Mar., 2003), pp. 172-178
Stable URL: http://www.jstor.org/stable/3093946
Page Count: 7
  • Read Online (Free)
  • Download ($12.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Evolutionary and Taxonomic Implications of RAPD Data on the Genetic Relationships of Mimulus michiganensis (Comb. et stat. nov.: Scrophulariaceae)
Preview not available

Abstract

Genetic relationships of Mimulus michiganensis comb. et stat. nov., formerly known as M. glabratus var. michiganensis, and two related species that have been implicated in its origin, M. glabratus var. jamesii and M. guttatus, were studied using random amplified polymorphic DNA (RAPD) markers. Genetic similarities were calculated based on the RAPD data using Jaccard's coefficient and used to construct a UPGMA phenogram. All individuals of M. michiganensis were highly similar to each other and formed a distinct cluster in the phenogram. This cluster was nested among the individuals of M. glabratus var. jamesii, and the resulting cluster was, in turn, nested within the individuals of M. guttatus. These findings, in agreement with earlier morphological and crossing studies, support the elevation of the taxon in rank from variety to species; accordingly, the new combination M. michiganensis was established. No evidence was found to support earlier hypotheses of a role of M. guttatus in the origin of M. michiganensis through hybridization with M. glabratus var. jamesii or through direct ancestry via an aneuploidy event. The results are consistent with a close relationship between M. michiganensis and M. glabratus var. jamesii.

Page Thumbnails

  • Thumbnail: Page 
172
    172
  • Thumbnail: Page 
173
    173
  • Thumbnail: Page 
174
    174
  • Thumbnail: Page 
175
    175
  • Thumbnail: Page 
176
    176
  • Thumbnail: Page 
177
    177
  • Thumbnail: Page 
178
    178