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CONSPECIFICITY OF SOME CHAROPHYTES(1).

V W Proctor1, C C de Donterberg1, A T Hotchkiss1

  • 1Department of Biology, Texas Technological College, Lubbock, Texas 79409Nhiseo Argentine) de Ciencias Naturales, Buenos Aires. ArgentinaDepartment of Biology, University of Louisville, Louisville, Kentucky 40208Department of Biology, University of Osaka, Osaka, Japan.

Journal of Phycology
|April 12, 2016
PubMed
Summary
This summary is machine-generated.

Experimental crosses suggest three taxa, Chara buckellii, Nitellopsis bulbillifera, and Chara longifolia, are biologically the same species. Chara longifolia and Chara hornemannii remain distinct species with no evidence of gene flow.

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Area of Science:

  • Botany
  • Algology
  • Plant Taxonomy

Background:

  • The species Chara buckellii, Nitellopsis bulbillifera, and Chara longifolia have distinct type localities.
  • Previous taxonomic classifications have treated these as separate entities.

Purpose of the Study:

  • To investigate the biological conspecificity of Chara buckellii, Nitellopsis bulbillifera, and Chara longifolia.
  • To clarify the species boundary between Chara longifolia and Chara hornemannii.

Main Methods:

  • Successful experimental crosses were conducted between plant clones from British Columbia (type locality of C. buckellii) and Argentina (type locality of N. bulbillifera).
  • Crosses were also performed with additional clones from Texas, New Mexico, and Wyoming, identified as C. longifolia.
  • Field observations and experimental crosses were used to assess gene flow between C. longifolia and C. hornemannii.

Main Results:

  • Plants from the type localities of C. buckellii and N. bulbillifera were successfully crossed.
  • All three taxa (C. buckellii, N. bulbillifera, and C. longifolia) demonstrated successful interbreeding, suggesting they are biologically conspecific.
  • No evidence of gene flow was found between C. longifolia and C. hornemannii in either field observations or experimental crosses.

Conclusions:

  • Chara buckellii, Nitellopsis bulbillifera, and Chara longifolia should be considered the same biological species.
  • Chara longifolia and Chara hornemannii represent distinct species that do not interbreed.